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From: Tim Chase <python.list@tim.thechases.com>
Newsgroups: comp.lang.python
Subject: Re: Regular expressions
Date: Tue, 3 Nov 2015 05:50:18 -0600
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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).

-tkc