Re: tweaking random number

2012-05-09 Thread Peter Otten 
Nikhil Verma wrote:

> Hi All
> 
> I want to generate a random number of 8 digits which involve 3 number and
> 5 digits.
> Like this :-
> 
> def random_number():
> # do something
> 
> random_number()
> "123abcde" # first 3 numbers and 5 letters after the numbers.
> 
> I am able to generate the random number 8 digit like this:-
> 
> def random_number():
> characters = list(string.ascii_lowercase + string.ascii_uppercase\
> + string.digits)
> coll_rand = []
> for i in range(8):
> random.shuffle(characters)
> coll_rand.append(characters[0])
> return ''.join(coll_rand)
> 
> This generates like this "Kkrgt56r"
> 
> Thanks in advance

If you generalize your random_number() function

>>> import random, string
>>> def random_code(n=8, 
chars=string.ascii_lowercase+string.ascii_uppercase+string.digits):
... return "".join(random.choice(chars) for _ in range(n))
... 
>>> random_code()
'NgcLhYdR'
>>> random_code()
'j9gafcHh'
>>> random_code(chars="123ABC")
'C311BA31'
>>> random_code(n=4)
'MAsV'

you can use it as a building block quite easily:

>>> def three_five():
... return random_code(3, string.digits) + random_code(5, 
string.ascii_lowercase + string.ascii_uppercase)
... 
>>> three_five()
'656xEWmd'
>>> three_five()
'589XqZcI'
>>> three_five()
'168iOOIM'


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Re: tweaking random number

2012-05-09 Thread Chris Angelico 
On Wed, May 9, 2012 at 5:01 PM, Nikhil Verma  wrote:
> Hi All
>
> I want to generate a random number of 8 digits which involve 3 number and 5
> digits.

(That's 3 digits and 5 letters) Pretty easy. Do you want to
distinguish between uppercase and lowercase letters?

Your current random_number function (btw, I wouldn't call it "number"
as it isn't one) is most of one possible solution. Divide it into two
parts, one part that generates the digits and another part that
generates the letters. Your 'characters' template would thus be
different for the two parts.

There are other solutions, which involve the generation of less random
numbers, but your way will work.

ChrisA
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Re: tweaking random number

2012-05-09 Thread MRAB 

On 09/05/2012 08:01, Nikhil Verma wrote:

Hi All

I want to generate a random number of 8 digits which involve 3 number
and 5 digits.
Like this :-

def random_number():
 # do something

random_number()
"123abcde" # first 3 numbers and 5 letters after the numbers.

I am able to generate the random number 8 digit like this:-

def random_number():
 characters = list(string.ascii_lowercase + string.ascii_uppercase\
 + string.digits)
 coll_rand = []
 for i in range(8):
 random.shuffle(characters)
 coll_rand.append(characters[0])
 return ''.join(coll_rand)

This generates like this "Kkrgt56r"


Use random.choice to pick a random digit or a random letter.
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tweaking random number

2012-05-09 Thread Nikhil Verma 
Hi All

I want to generate a random number of 8 digits which involve 3 number and 5
digits.
Like this :-

def random_number():
# do something

random_number()
"123abcde" # first 3 numbers and 5 letters after the numbers.

I am able to generate the random number 8 digit like this:-

def random_number():
characters = list(string.ascii_lowercase + string.ascii_uppercase\
+ string.digits)
coll_rand = []
for i in range(8):
random.shuffle(characters)
coll_rand.append(characters[0])
return ''.join(coll_rand)

This generates like this "Kkrgt56r"

Thanks in advance

-- 
Regards
Nikhil Verma
+91-958-273-3156
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