wording assert function difficulty in python

Question

I wrote a code and the only problem I have is the assert function syntax. For the function great(s,b), b has to be in range (2,37) and s has to be a string. At the same time I need to assert that s contain only digits 0-9, letters a-z, and the . (dot).

def great(s,b):
       assert b in range(2,37) and type(s)==str

score 0 · Answer 1 · edited May 23 '17 at 12:19

0

To check whether b is integer in range from 2 to 37 inclusively:

assert isinstance(b, int) and 2 <= b <= 37

s being a string (for python 3)

assert isinstance(s, str)

For checking against fixed number of symbols, one can use regular expression:

import re
allowed_re = re.compile('^[0-9a-z.]*$')
assert allowed_re.match(s)

edited May 23 '17 at 12:19

Community

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answered Nov 21 '13 at 20:23

alko

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i dont understand the last part. what is re? isnt there an easier way? – user2751595 Nov 21 '13 at 20:29
@user2751595 yes, there are others, I just don't have py3 at hand and can't check exact syntax of `translate` for example. – alko Nov 21 '13 at 20:30

score -1 · Answer 2 · answered Nov 21 '13 at 20:23

-1

the error info needed, assertion link, http://www.tutorialspoint.com/python/assertions_in_python.htm

def great(s,b):
        assert ((b in range(2,37)) and (type(s)==str)), "error happens"

answered Nov 21 '13 at 20:23

JQian

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No, this is not correct. Please read the [docs](http://docs.python.org/3.2/reference/simple_stmts.html). – Steinar Lima Nov 21 '13 at 20:31

wording assert function difficulty in python

2 Answers2