On 08/25/2011 05:46 AM, Lisi wrote:
I copied and ran the following script:
multiplier = 12
for j in range(1,13):
print "%d x %d = %d" %(j, multiplier, j*multiplier)
That ran perfectly and gave me the 12 times table.
I then decided that it would be fun to branch out and make teh
script "universal", so I wrote and ran:
print "Which times table do you want?"
multiplier = raw_input ()
for j in range(1,13):
print "%d x %d = %d" %(j, multiplier, j*multiplier)
The j in range section of code is identical, but I now get:
lisi@Tux:~/Python$ python multiplier.py
Which times table do you want?
4
Traceback (most recent call last):
File "multiplier.py", line 8, in<module>
print "%d x %d = %d" %(j, multiplier, j*multiplier)
TypeError: int argument required
lisi@Tux:~/Python$
What extra should I have done because the variable value came from the
keyboard, and why is it different from the first example?
Lisi
If you get an error with that specific a wording, use the system to tell
you what's wrong. Add a print statement immediately before the
offending line, and print thorough information about each of the
variables used. In this case, the obvious candidate is multiplier.
So print repr(multiplier) and type(multiplier) and see if that shows you
anything different from what the error message asked for, or different
from the repr() and type() of your first script.
Now that you know what the type of variable multiplier is, can you guess
how to convert it to the one you need?
DaveA
--
DaveA
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