Re: [Tutor] Unable to run a simple Hello.py in WinXP
Adam Bark adam.jt...@gmail.com 05/18/2010 01:21 AM To Sivapathasuntha Aruliah/S1/a...@amkor cc tutor@python.org Subject Re: [Tutor] Unable to run a simple Hello.py in WinXP On 17 May 2010 09:05, Sivapathasuntha Aruliah sivapathasuntha.arul...@amkor.com wrote: Hi If possible please run the following two lines after saving it as a py file on WINXP and check whether it runs smooythly. When I run I get error. I use Python 3.1.2 (r312:79149, Mar 21 2010, 00:41:52) [MSC v.1500 32 bit (Intel)] on win32 Type copyright, credits or license() for more information. However when I give the following command on Python shell print(Hello, World!) it neately prints Hello World! #! /usr/bin/env python3 print(Hello, World!) Regards, Siva Hi, are you sure you got your python path correct? Are you running 64bit windows by any chance? Hi Adam I also suspected it could be 64 bit but from IDLE gui which I used it shows the followings which confirms 32 bit? So please if you have WINXP bit32 please try to run and show me what command including paths you used to get a successful run. Python 3.1.2 (r312:79149, Mar 21 2010, 00:41:52) [MSC v.1500 32 bit (Intel)] on win32 Type copyright, credits or license() for more information. image/gif___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Unable to run a simple Hello.py in WinXP
Hi Yashwin When I run the hello.py from it's location by double clicking it shows an error with the pop up window C:\Python31\python.exe is not a valid win32 application. When I give the command from IDLE then it says SyntaxError: invalid syntax Which can be seen from Python Shell. Please analyse. Regards, Siva Test Equipment Engineering Amkor Technology (S) Pte Ltd 1 Kaki Bukit View #03-28 TechView Building Singapore 415941 Tel: (65) 6347 1131 Fax: (65) 6746 4815 Yashwin Kanchan yashwinkanc...@gmail.com 05/18/2010 03:28 AM To Sivapathasuntha Aruliah/S1/a...@amkor cc tutor@python.org Subject Re: [Tutor] Unable to run a simple Hello.py in WinXP Hi Siva This looks more of issue with the python installation on your PC. Could be a bad installation, in which case I would suggest re-installation of python. Also it could be something to do with permission on your PC. Also you say that you were successful in running the script on python shell. Could you please tell us do you mean IDLE or the python command prompt?In either case please tell us how do you to initiate the shell on your machine. Regards Yashwin Kanchan On 17 May 2010 09:05, Sivapathasuntha Aruliah sivapathasuntha.arul...@amkor.com wrote: Hi If possible please run the following two lines after saving it as a py file on WINXP and check whether it runs smooythly. When I run I get error. I use Python 3.1.2 (r312:79149, Mar 21 2010, 00:41:52) [MSC v.1500 32 bit (Intel)] on win32 Type copyright, credits or license() for more information. However when I give the following command on Python shell print(Hello, World!) it neately prints Hello World! #! /usr/bin/env python3 print(Hello, World!) Regards, Siva Test Equipment Engineering Amkor Technology (S) Pte Ltd 1 Kaki Bukit View #03-28 TechView Building Singapore 415941 Tel: (65) 6347 1131 Fax: (65) 6746 4815 ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor image/gifimage/gif___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
[Tutor] Different between pass continue
Hi All, I couldn't understand the difference between pass and continue keywords, could you explain to me? -- Best Regards Muhammad Bashir Al-Noimi My Blog: http://mbnoimi.net ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Different between pass continue
M. Bashir Al-Noimi wrote: Hi All, I couldn't understand the difference between pass and continue keywords, could you explain to me? Taken from the docs at http://docs.python.org/tutorial/controlflow.html The continue statement continues the next iteration of a loop for eg. for line in file: if not line.strip(): # If the line is empty then continue The pass statement does nothing. It can be used when a statement is required syntactically but the program requires no action. For example: while True: pass # Busy-wait for keyboard interrupt (Ctrl+C) -- Kind Regards, Christian Witts ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Different between pass continue
On Tue, 18 May 2010 10:34:16 pm M. Bashir Al-Noimi wrote: Hi All, I couldn't understand the difference between pass and continue keywords, could you explain to me? pass is a do-nothing statement. It literally does nothing. continue is only allowed inside a for-loop or while-loop, and means jump to the start of the loop. It is related to break. Consider the difference between these three loops: for x in (1,2,3): ... print(x) ... pass ... print(x, again) ... 1 1 again 2 2 again 3 3 again for x in (1,2,3): ... print(x) ... continue ... print(x, again) ... 1 2 3 for x in (1,2,3): ... print(x) ... break ... print(x, again) ... 1 -- Steven D'Aprano ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
[Tutor] PYTHON 3.1
Python 3.1.1 (r311:74483, Aug 17 2009, 17:02:12) [MSC v.1500 32 bit (Intel)]
on win32
Type copyright, credits or license() for more information.
print 'hello'
SyntaxError: invalid syntax (pyshell#0, line 1)
print ('hello')
hello
the above print is what i came across having installed python 3.0 and trying
to run the print command.
with previous versions, a print command takes the form
print 'parameter'
and the output is
parameter
but with this new version it seems you need to put in brackets like:
print ('hello')
to get an output like:
hello
please confirm this is a new syntax for print.
thank you.
i will put up morte concerns as they arrive.
thanks.
--
Elegbede Muhammed Oladipupo
OCA
+2348077682428
+2347042171716
www.dudupay.com
Mobile Banking Solutions | Transaction Processing | Enterprise Application
Development
___
Tutor maillist - Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] PYTHON 3.1
On Tue, May 18, 2010 at 8:40 AM, Dipo Elegbede delegb...@dudupay.comwrote:
Python 3.1.1 (r311:74483, Aug 17 2009, 17:02:12) [MSC v.1500 32 bit
(Intel)] on win32
Type copyright, credits or license() for more information.
print 'hello'
SyntaxError: invalid syntax (pyshell#0, line 1)
print ('hello')
hello
the above print is what i came across having installed python 3.0 and
trying to run the print command.
with previous versions, a print command takes the form
print 'parameter'
and the output is
parameter
but with this new version it seems you need to put in brackets like:
print ('hello')
to get an output like:
hello
please confirm this is a new syntax for print.
thank you.
i will put up morte concerns as they arrive.
thanks.
--
Elegbede Muhammed Oladipupo
OCA
+2348077682428
+2347042171716
www.dudupay.com
Mobile Banking Solutions | Transaction Processing | Enterprise Application
Development
___
Tutor maillist - Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor
In python 3K print is a function.
So, print('hello, world') is the correct syntax.
You may find this article helpful:
http://docs.python.org/py3k/whatsnew/3.0.html
___
Tutor maillist - Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] PYTHON 3.1
Dipo Elegbede wrote:
Python 3.1.1 (r311:74483, Aug 17 2009, 17:02:12) [MSC v.1500 32 bit
(Intel)] on win32
Type copyright, credits or license() for more information.
print 'hello'
SyntaxError: invalid syntax (pyshell#0, line 1)
print ('hello')
hello
the above print is what i came across having installed python 3.0 and
trying to run the print command.
with previous versions, a print command takes the form
print 'parameter'
and the output is
parameter
but with this new version it seems you need to put in brackets like:
print ('hello')
to get an output like:
hello
please confirm this is a new syntax for print.
thank you.
i will put up morte concerns as they arrive.
thanks.
--
Elegbede Muhammed Oladipupo
OCA
+2348077682428
+2347042171716
www.dudupay.com http://www.dudupay.com
Mobile Banking Solutions | Transaction Processing | Enterprise
Application Development
___
Tutor maillist - Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor
The Python 3.x series changed the print statement to a print function.
--
Kind Regards,
Christian Witts
___
Tutor maillist - Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] PYTHON 3.1
thanks a lot.
i was almost going to abandon this python again out of frustration. i have
done it before but with you guys around, it would never happen again.
i have a pdf version of python programming for absolute beginners, could
anyone please help me with its accompaning CD content?
thanks as i anticipate responses.
regards.
On Tue, May 18, 2010 at 2:02 PM, James Reynolds eire1...@gmail.com wrote:
On Tue, May 18, 2010 at 8:40 AM, Dipo Elegbede delegb...@dudupay.comwrote:
Python 3.1.1 (r311:74483, Aug 17 2009, 17:02:12) [MSC v.1500 32 bit
(Intel)] on win32
Type copyright, credits or license() for more information.
print 'hello'
SyntaxError: invalid syntax (pyshell#0, line 1)
print ('hello')
hello
the above print is what i came across having installed python 3.0 and
trying to run the print command.
with previous versions, a print command takes the form
print 'parameter'
and the output is
parameter
but with this new version it seems you need to put in brackets like:
print ('hello')
to get an output like:
hello
please confirm this is a new syntax for print.
thank you.
i will put up morte concerns as they arrive.
thanks.
--
Elegbede Muhammed Oladipupo
OCA
+2348077682428
+2347042171716
www.dudupay.com
Mobile Banking Solutions | Transaction Processing | Enterprise Application
Development
___
Tutor maillist - Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor
In python 3K print is a function.
So, print('hello, world') is the correct syntax.
You may find this article helpful:
http://docs.python.org/py3k/whatsnew/3.0.html
___
Tutor maillist - Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor
--
Elegbede Muhammed Oladipupo
OCA
+2348077682428
+2347042171716
www.dudupay.com
Mobile Banking Solutions | Transaction Processing | Enterprise Application
Development
___
Tutor maillist - Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor
[Tutor] what is wrong with this syntax?
ples help me figure out what is wrong with this syntax?
print('Here are the numbers from 0 to 9')
for i in the range(10):
print(i)
thank you.
i am currently reading a byte of a python.
thanks.
--
Elegbede Muhammed Oladipupo
OCA
+2348077682428
+2347042171716
www.dudupay.com
Mobile Banking Solutions | Transaction Processing | Enterprise Application
Development
___
Tutor maillist - Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] what is wrong with this syntax?
in the header of for loop, you don't need to use the - for i in range(10)
On 5/18/10, Dipo Elegbede delegb...@dudupay.com wrote:
ples help me figure out what is wrong with this syntax?
print('Here are the numbers from 0 to 9')
for i in the range(10):
print(i)
thank you.
i am currently reading a byte of a python.
thanks.
--
Elegbede Muhammed Oladipupo
OCA
+2348077682428
+2347042171716
www.dudupay.com
Mobile Banking Solutions | Transaction Processing | Enterprise Application
Development
___
Tutor maillist - Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] what is wrong with this syntax?
its the the part
print('Here are the numbers from 0 to 9')
# for i in the range(10): #your version
for i in range(10): #try this
print(i)
im still learning myself, so be gentle if im wrong but it worked for me.
Alex
___
Tutor maillist - Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] PYTHON 3.1
(Please don't top-post. Add your comments to the end of the portion you're quoting.) Dipo Elegbede wrote: thanks a lot. i was almost going to abandon this python again out of frustration. i have done it before but with you guys around, it would never happen again. i have a pdf version of python programming for absolute beginners, could anyone please help me with its accompaning CD content? thanks as i anticipate responses. regards. I don't know the version that your CD was written for. If you're going to use a tutorial, it's smart to get a matching version of Python. So if your tutorial is for 2.x, you should get Python 2.6 (or soon, 2.7). Otherwise, you'll be frequently frustrated by the differences. They're not that bad, once you know the language. But while you're learning, try to match your learning materials with your version. DaveA ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] what is wrong with this syntax?
Dipo Elegbede wrote:
ples help me figure out what is wrong with this syntax?
print('Here are the numbers from 0 to 9')
for i in the range(10):
print(i)
Remove the word the
print('Here are the numbers from 0 to 9')
for i in range(10):
print(i)
Cheers,
Vern
thank you.
i am currently reading a byte of a python.
thanks.
--
Elegbede Muhammed Oladipupo
OCA
+2348077682428
+2347042171716
www.dudupay.com http://www.dudupay.com
Mobile Banking Solutions | Transaction Processing | Enterprise
Application Development
___
Tutor maillist - Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor
--
This time for sure!
-Bullwinkle J. Moose
-
Vern Ceder, Director of Technology
Canterbury School, 3210 Smith Road, Ft Wayne, IN 46804
vce...@canterburyschool.org; 260-436-0746; FAX: 260-436-5137
The Quick Python Book, 2nd Ed - http://bit.ly/bRsWDW
___
Tutor maillist - Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] PYTHON 3.1
I AM CURRENTLY LEARNING WITH PYTHON 3.0 just about now, you are all blowing my minds. this is great. On Tue, May 18, 2010 at 2:49 PM, Dave Angel da...@ieee.org wrote: (Please don't top-post. Add your comments to the end of the portion you're quoting.) Dipo Elegbede wrote: thanks a lot. i was almost going to abandon this python again out of frustration. i have done it before but with you guys around, it would never happen again. i have a pdf version of python programming for absolute beginners, could anyone please help me with its accompaning CD content? thanks as i anticipate responses. regards. I don't know the version that your CD was written for. If you're going to use a tutorial, it's smart to get a matching version of Python. So if your tutorial is for 2.x, you should get Python 2.6 (or soon, 2.7). Otherwise, you'll be frequently frustrated by the differences. They're not that bad, once you know the language. But while you're learning, try to match your learning materials with your version. DaveA -- Elegbede Muhammed Oladipupo OCA +2348077682428 +2347042171716 www.dudupay.com Mobile Banking Solutions | Transaction Processing | Enterprise Application Development ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] PYTHON 3.1
That's a good one Sir, i started out with 2.x series but left it for a while. Coming back now, i'm getting on well just for this few changes but I think with a forum like this, I'd fare well in this pythonic journey. Thanks. On Tue, May 18, 2010 at 2:56 PM, Walter Prins wpr...@gmail.com wrote: IMHO: If you're new to Python and just trying to learn the language, I'd suggest sticking to Python 2.x for now, as the vast majority of Python material out there still use and refer to Python 2.x syntax. IMHO it'll be a lot easier learning and coping with what's changed in Python 3 only once you are already comfortable with Python 2.x syntax, rather than trying to use materials and books referencing 2.x on 3.x and then consequently running into unexpected issues as above, and never being sure whether issues you run into is due to some mistake on your part or a difference between 2.x and 3.x. -- Elegbede Muhammed Oladipupo OCA +2348077682428 +2347042171716 www.dudupay.com Mobile Banking Solutions | Transaction Processing | Enterprise Application Development ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] what is wrong with this syntax?
all worked well.
thanks all.
On Tue, May 18, 2010 at 2:47 PM, alex gunn alex.g...@smallshinyant.comwrote:
its the the part
print('Here are the numbers from 0 to 9')
# for i in the range(10): #your version
for i in range(10): #try this
print(i)
im still learning myself, so be gentle if im wrong but it worked for me.
Alex
--
Elegbede Muhammed Oladipupo
OCA
+2348077682428
+2347042171716
www.dudupay.com
Mobile Banking Solutions | Transaction Processing | Enterprise Application
Development
___
Tutor maillist - Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] what is wrong with this syntax?
On Tue, 18 May 2010 11:36:02 pm Dipo Elegbede wrote:
ples help me figure out what is wrong with this syntax?
print('Here are the numbers from 0 to 9')
for i in the range(10):
print(i)
thank you.
Others have already given you the answer, but more important is for you
to learn *how* to get the answer.
Look at the error message Python prints:
for i in the range(10):
File stdin, line 1
for i in the range(10):
^
SyntaxError: invalid syntax
You get a SyntaxError, which tells you that what you've written makes no
sense to the Python compiler. It also tells you that the error has
nothing to do with either of the print lines.
Unfortunately Python isn't smart enough to recognise that the problem is
with the rather than range(10), but it points you to the correct
line.
--
Steven D'Aprano
___
Tutor maillist - Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] what is wrong with this syntax?
thanks Steven. I'll always be mindful of that.
By the way, I need someone to briefly explain to me how the while loop works.
a little on break will also do.
thanks.
On 5/18/10, Steven D'Aprano st...@pearwood.info wrote:
On Tue, 18 May 2010 11:36:02 pm Dipo Elegbede wrote:
ples help me figure out what is wrong with this syntax?
print('Here are the numbers from 0 to 9')
for i in the range(10):
print(i)
thank you.
Others have already given you the answer, but more important is for you
to learn *how* to get the answer.
Look at the error message Python prints:
for i in the range(10):
File stdin, line 1
for i in the range(10):
^
SyntaxError: invalid syntax
You get a SyntaxError, which tells you that what you've written makes no
sense to the Python compiler. It also tells you that the error has
nothing to do with either of the print lines.
Unfortunately Python isn't smart enough to recognise that the problem is
with the rather than range(10), but it points you to the correct
line.
--
Steven D'Aprano
___
Tutor maillist - Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor
--
Elegbede Muhammed Oladipupo
OCA
+2348077682428
+2347042171716
www.dudupay.com
Mobile Banking Solutions | Transaction Processing | Enterprise
Application Development
___
Tutor maillist - Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] what is wrong with this syntax?
A LITTLE EXPLANATIONS ON CONTINUE WOULD BE APPRECIATED TOO.
in a recap, i would appreciate any brief explanation on
1. break
2. continue
3. while loop
how they work and application in writing codes.
thank you all.
On 5/18/10, Dipo Elegbede delegb...@dudupay.com wrote:
thanks Steven. I'll always be mindful of that.
By the way, I need someone to briefly explain to me how the while loop
works.
a little on break will also do.
thanks.
On 5/18/10, Steven D'Aprano st...@pearwood.info wrote:
On Tue, 18 May 2010 11:36:02 pm Dipo Elegbede wrote:
ples help me figure out what is wrong with this syntax?
print('Here are the numbers from 0 to 9')
for i in the range(10):
print(i)
thank you.
Others have already given you the answer, but more important is for you
to learn *how* to get the answer.
Look at the error message Python prints:
for i in the range(10):
File stdin, line 1
for i in the range(10):
^
SyntaxError: invalid syntax
You get a SyntaxError, which tells you that what you've written makes no
sense to the Python compiler. It also tells you that the error has
nothing to do with either of the print lines.
Unfortunately Python isn't smart enough to recognise that the problem is
with the rather than range(10), but it points you to the correct
line.
--
Steven D'Aprano
___
Tutor maillist - Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor
--
Elegbede Muhammed Oladipupo
OCA
+2348077682428
+2347042171716
www.dudupay.com
Mobile Banking Solutions | Transaction Processing | Enterprise
Application Development
--
Elegbede Muhammed Oladipupo
OCA
+2348077682428
+2347042171716
www.dudupay.com
Mobile Banking Solutions | Transaction Processing | Enterprise
Application Development
___
Tutor maillist - Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor
[Tutor] Loop basics (was Re: what is wrong with this syntax?)
I'm changing the subject line because this is going into a different topic.
On Tue, May 18, 2010 at 05:39:50PM +0100, Dipo Elegbede wrote:
A LITTLE EXPLANATIONS ON CONTINUE WOULD BE APPRECIATED TOO.
in a recap, i would appreciate any brief explanation on
1. break
2. continue
3. while loop
These are the basic constructs in many languages for repeating a set of
tasks over and over, as long as some condition remains true. Say you had
a function which asks the user a yes or no question and returns True if
they said 'yes' or False if they said 'no'.
You want to play a game as long as they keep saying they're willing to
play, so assuming a function play_game() which does the actual playing,
making Python keep doing this repeatedly would look like this:
while ask_yes_or_no('Do you want to play a game?'):
play_game()
If you get into the loop and decide you want to bail out early rather
than waiting for the condition to become False on its own, you can
just put a break statement inside the loop. As soon as Python encounters
that break, it will stop the loop.
while ask_yes_or_no('Do you want to play a game?'):
print 'Okay, that will be fun.'
if not ask_yes_or_no('Are you sure, though?'):
break
play_game()
continue is like break in that it upsets the normal flow of the loop
body, but whereas break stops the loop completely, continue abandons
only THIS run through the loop, jumps immediately back to the top,
and continues from there, testing the condition to see if another trip
through the loop is allowed at this point.
For example, you might write the ask_yes_or_no function like this:
def ask_yes_or_no(prompt):
while True:
answer = raw_input(prompt)
if answer == 'both':
print 'Now that's just silly, try again.'
continue
if answer == 'yes':
return True
if answer == 'no':
return False
print 'Please answer yes or no.'
___
Tutor maillist - Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] PYTHON 3.1
On Tue, 18 May 2010 14:53:45 +0100 Dipo Elegbede delegb...@dudupay.com wrote: I AM CURRENTLY LEARNING WITH PYTHON 3.0 just about now, you are all blowing my minds. this is great. Please don't write your replies on top. Write them instead just after the part(s) of the message you're replying to; and delete the rest. By doing so, you help keeping the flow of the discussion; else, everything gets messed up after 2-3 replies. Denis vit esse estrany ☣ spir.wikidot.com ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] PYTHON 3.1
Dipo Elegbede delegb...@dudupay.com wrote please confirm this is a new syntax for print. thank you. i will put up morte concerns as they arrive. Please read the Whats New in Python v3 documents first. Version 3 of Python is a major change in the language with many big changes. Do not just try stuff and send it here every time something breaks. Read the documents first so you know what to expect. -- Alan Gauld Author of the Learn to Program web site http://www.alan-g.me.uk ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Loop basics (was Re: what is wrong with this syntax?)
thanks Steve, this response came handy.
I would have to take this home and read. if i encounter difficulties,
I'd get back to the house.
I'm grateful.
If I get more explanations though, it would be great.
Regards,
On 5/18/10, Steve Willoughby st...@alchemy.com wrote:
I'm changing the subject line because this is going into a different topic.
On Tue, May 18, 2010 at 05:39:50PM +0100, Dipo Elegbede wrote:
A LITTLE EXPLANATIONS ON CONTINUE WOULD BE APPRECIATED TOO.
in a recap, i would appreciate any brief explanation on
1. break
2. continue
3. while loop
These are the basic constructs in many languages for repeating a set of
tasks over and over, as long as some condition remains true. Say you had
a function which asks the user a yes or no question and returns True if
they said 'yes' or False if they said 'no'.
You want to play a game as long as they keep saying they're willing to
play, so assuming a function play_game() which does the actual playing,
making Python keep doing this repeatedly would look like this:
while ask_yes_or_no('Do you want to play a game?'):
play_game()
If you get into the loop and decide you want to bail out early rather
than waiting for the condition to become False on its own, you can
just put a break statement inside the loop. As soon as Python encounters
that break, it will stop the loop.
while ask_yes_or_no('Do you want to play a game?'):
print 'Okay, that will be fun.'
if not ask_yes_or_no('Are you sure, though?'):
break
play_game()
continue is like break in that it upsets the normal flow of the loop
body, but whereas break stops the loop completely, continue abandons
only THIS run through the loop, jumps immediately back to the top,
and continues from there, testing the condition to see if another trip
through the loop is allowed at this point.
For example, you might write the ask_yes_or_no function like this:
def ask_yes_or_no(prompt):
while True:
answer = raw_input(prompt)
if answer == 'both':
print 'Now that's just silly, try again.'
continue
if answer == 'yes':
return True
if answer == 'no':
return False
print 'Please answer yes or no.'
--
Elegbede Muhammed Oladipupo
OCA
+2348077682428
+2347042171716
www.dudupay.com
Mobile Banking Solutions | Transaction Processing | Enterprise
Application Development
___
Tutor maillist - Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] what is wrong with this syntax?
On 5/18/2010 11:23 AM, Steven D'Aprano wrote: Others have already given you the answer, but more important is for you to learn *how* to get the answer. Look at the error message Python prints: for i in the range(10): File stdin, line 1 for i in the range(10): ^ SyntaxError: invalid syntax You get a SyntaxError, which tells you that what you've written makes no sense to the Python compiler. It also tells you that the error has nothing to do with either of the print lines. Unfortunately Python isn't smart enough to recognise that the problem is with the rather than range(10) To be more specific - Python is happy with for i in the . It is expectingeither : or some operator. range is neither - so that is where the error pointer is. Example: the = [1,2,3] for i in the: print(i) for i in the + [4]: print(i) -- Bob Gailer 919-636-4239 Chapel Hill NC ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] PYTHON 3.1
ok On 5/18/10, spir ☣ denis.s...@gmail.com wrote: On Tue, 18 May 2010 14:53:45 +0100 Dipo Elegbede delegb...@dudupay.com wrote: I AM CURRENTLY LEARNING WITH PYTHON 3.0 just about now, you are all blowing my minds. this is great. Please don't write your replies on top. Write them instead just after the part(s) of the message you're replying to; and delete the rest. By doing so, you help keeping the flow of the discussion; else, everything gets messed up after 2-3 replies. Denis vit esse estrany ☣ spir.wikidot.com ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor -- Elegbede Muhammed Oladipupo OCA +2348077682428 +2347042171716 www.dudupay.com Mobile Banking Solutions | Transaction Processing | Enterprise Application Development ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] what is wrong with this syntax?
Dipo Elegbede delegb...@dudupay.com wrote By the way, I need someone to briefly explain to me how the while loop works. a little on break will also do. Your tutorial should do that but you can also look at the Loops section of my tutorial - use the V3 version - for a discussion of while loops. It does not cover break/continue because they are not really necessary to write programs, simply convenience features so I don't cover them till much later. -- Alan Gauld Author of the Learn to Program web site http://www.alan-g.me.uk/ ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] what is wrong with this syntax?
On Wed, 19 May 2010 01:23:55 +1000
Steven D'Aprano st...@pearwood.info wrote:
On Tue, 18 May 2010 11:36:02 pm Dipo Elegbede wrote:
ples help me figure out what is wrong with this syntax?
print('Here are the numbers from 0 to 9')
for i in the range(10):
print(i)
thank you.
Others have already given you the answer, but more important is for you
to learn *how* to get the answer.
Look at the error message Python prints:
for i in the range(10):
File stdin, line 1
for i in the range(10):
^
SyntaxError: invalid syntax
You get a SyntaxError, which tells you that what you've written makes no
sense to the Python compiler. It also tells you that the error has
nothing to do with either of the print lines.
Unfortunately Python isn't smart enough to recognise that the problem is
with the rather than range(10), but it points you to the correct
line.
And logically, if the error is not at the pointed word/line, it will be just
before.
This means that when analysing your code, python passed on the real error
cause, because of a possible ambiguity; but then the rest makes no sense, so it
stops and points where it got blocked, immediately after the error.
In the code above, the could be a name you gave to a list, for instance;
since an expression starting like for i in listName is correct, Python cannot
stop on the... but then the rest of the line makes no more sense for it.
(Fortunately, python 3.2, planned for April 1, 2011, will be informed that
the is an english article. This is possible since there is no ambiguity with
thé (fr), thank to Python's clever diacritic-awareness. Only remains then the
problematic case of a.)
Denis
vit esse estrany ☣
spir.wikidot.com
___
Tutor maillist - Tutor@python.org
To unsubscribe or change subscription options:
http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] [SOLVED] Different between pass continue
Thanks On 18/05/2010 02:20 م, Steven D'Aprano wrote: On Tue, 18 May 2010 10:34:16 pm M. Bashir Al-Noimi wrote: Hi All, I couldn't understand the difference between pass and continue keywords, could you explain to me? pass is a do-nothing statement. It literally does nothing. continue is only allowed inside a for-loop or while-loop, and means jump to the start of the loop. It is related to break. Consider the difference between these three loops: for x in (1,2,3): ... print(x) ... pass ... print(x, again) ... 1 1 again 2 2 again 3 3 again for x in (1,2,3): ... print(x) ... continue ... print(x, again) ... 1 2 3 for x in (1,2,3): ... print(x) ... break ... print(x, again) ... 1 -- Best Regards Muhammad Bashir Al-Noimi My Blog: http://mbnoimi.net ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
[Tutor] Unit testing command-line options from argparse or optparse
Hello all, Does anyone have advice for writing unit tests against variables set by command-line options? I have a program I'd like to run in either debug or live mode, with various settings associated with each. Below is some pseudo-code that shows what I'd like to do: snipped argparse import and options setup mode = p.parse_args() #always set to either --debug or --live if mode.live: recipients = ['jsm...@email.com', 'jane...@email.com'] # set logging to a file elif mode.debug: recipients = ['ad...@admin.com'] # log to stdout The live and debug attributes are set by command-line flags passed to the argparse module. What I'd like to do is write tests that check whether various settings (recipients, logging, etc.) are configured properly based on the command-line options. But if mode is not set until runtime, I clearly can't import it into my suite of unit tests, right? Is there some standard testing approach to this problem (perhaps mocking?) that you all can recommend? I'd greatly appreciate it. Serdar ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] what is wrong with this syntax?
On Wed, 19 May 2010 03:29:46 am spir ☣ wrote: (Fortunately, python 3.2, planned for April 1, 2011, will be informed that the is an english article. This is possible since there is no ambiguity with thé (fr), thank to Python's clever diacritic-awareness. Only remains then the problematic case of a.) I know you are joking, but that's exactly what Apple's Hypertalk programming language did. In Hypertalk, you could write: get the second field put it before the third field go to the last card of the next background or: get second field put it before third field go to last card of next background -- Steven D'Aprano ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Unit testing command-line options from argparse or optparse
Am 18.05.2010 22:49, schrieb Serdar Tumgoren: Hello all, Does anyone have advice for writing unit tests against variables set by command-line options? I have a program I'd like to run in either debug or live mode, with various settings associated with each. Below is some pseudo-code that shows what I'd like to do: snipped argparse import and options setup mode = p.parse_args() #always set to either --debug or --live if mode.live: recipients = ['jsm...@email.com mailto:jsm...@email.com', 'jane...@email.com mailto:jane...@email.com'] # set logging to a file elif mode.debug: recipients = ['ad...@admin.com mailto:ad...@admin.com'] # log to stdout The live and debug attributes are set by command-line flags passed to the argparse module. What I'd like to do is write tests that check whether various settings (recipients, logging, etc.) are configured properly based on the command-line options. But if mode is not set until runtime, I clearly can't import it into my suite of unit tests, right? Is there some standard testing approach to this problem (perhaps mocking?) that you all can recommend? I'd greatly appreciate it. Serdar ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor I just had a look at the optparse documentation ... huuu, quite heavier than I have expected But to your question: You could reorganise your main module. Put all your code which is on module level into a function called main with mode as argurment and add the neat if __name__ == __main__ condition at the end of your module to parse the command line options and call your main function. When you import your module to your test, you have to call the main function manually and can pass a mock for the mode as required. Let's say your main module is called serdars_main_module serdars_main_module.py: -- def main(mode): # all the program logic if mode.live: recipients = ['jsm...@email.com mailto:jsm...@email.com', 'jane...@email.com mailto:jane...@email.com'] # set logging to a file elif mode.debug: recipients = ['ad...@admin.com mailto:ad...@admin.com'] # log to stdout # ... if __name__ == __main__: mode = p.parse_args() #always set to either --debug or --liv main(mode) # Then your test module could look like: serdars_test_module.py: - # import serdars_main_module import unittest class ArgParseMock(object): def __init__(self, live, debug): self.live = live self.debug = debug class TestDebugMode(unittest.TestCase): def test_live_mode(self): mode = ArgParseMock(True, False) # create the mock for the arguments serdars_main_module.main(mode) # call the main logic with the mock # def test_debug_mode(self): mode = ArgParseMock(False, True) # create the mock for the arguments serdars_main_module.main(mode) # call the main logic with the mock # ## Hope that helps, Jan ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
