On 11/12/2015 4:34 PM, fl wrote:
I follow a web site on learning Python re. I have read the function
description of re.m, as below.
re.M Makes $ match the end of a line (not just the end of the string) and
makes ^ match the start of any line (not just the start of the string).
But I don't see the reason to put re.M in the example project:
#!/usr/bin/python
import re
line = "Cats are smarter than dogs";
matchObj = re.match( r'dogs', line, re.M|re.I)
if matchObj:
print "match --> matchObj.group() : ", matchObj.group()
else:
print "No match!!"
The tutorial (http://www.tutorialspoint.com/python/python_reg_expressions.htm)
is for a beginner as I. Is there something I don't see in the example?
No. The use of re.M in the examples is doubly irrelevant since there is
no \n in line and no $ in the pattern. Re.I is also not relevant since
there is no case-insensitive matchin. It appears that the author
routinely uses flags=re.M|re.I. For a tutorial, I would have omitted
either omitted them or explained them as routine boilerplate.
--
Terry Jan Reedy
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