[Tutor] Additional help
ramit.prasad at jpmorgan.com
Wed Feb 13 21:17:02 CET 2013
Ahmet Can KEPENEK wrote:
> I used regular expression module of python. I checked binary and denary numbers. If input is invalid i
> ask again. I edited your code. Code is below follow as .
> if re.match("^[0-1]*$", binary):
> if re.match("^[0-9]*$", denary2):
Both of these will fail for empty strings (or '\n').
I will quote Steven D'Aprano's often quoted quotation regarding
regular expressions. (Say that 5 times fast :) )
Some people, when confronted with a problem, think "I know,
I'll use regular expressions." Now they have two problems.
-- Jamie Zawinski
I think it would be more accurate (and easier) to convert to
int and see if the conversion works.
int(binary, 2) # binary = base 2
int(denary2, 10) # denary = base 10
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