Tim Chase wrote:
> On 2015-11-03 10:25, Peter Otten wrote:
>> >>> How do I make a regular expression that returns true if the end
>> >>> of the line is an asterisk
>> >>
>> >> Why use a regular expression?
>> >>
>> >> if line[-1] == '*':
>> >> yep(line)
>> >> else:
>> >> nope(line)
>>
>> Incidentally the code example has two "problems", too.
>>
>> - What about the empty string?
>
> Good catch: .endswith() works better.
>
>> - What about lines with a trailing "\n", i. e. as they are usually
>> delivered when iterating over a file?
>
> Then your string *doesn't* end with a "*", but rather with a
> newline. ;-)
>
> Though according to the OP's specs, the following function would work
> too:
>
> def ends_in_asterisk(s):
> return True
>
> It *does* return True if the line ends in an asterisk (no requirement
> to make the function return False under any other conditions).
If a "line" is defined as a string that ends with a newline
def ends_in_asterisk(line):
return False
would also satisfy the requirement. Lies, damned lies, and specs ;)
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