Regex: Perl to Python
Fillmore
fillmore_remove at hotmail.com
Sun Mar 6 23:38:23 EST 2016
Hi, I'm trying to move away from Perl and go to Python.
Regex seems to bethe hardest challenge so far.
Perl:
while (<HEADERFILE>) {
if (/(\d+)\t(.+)$/) {
print $1." - ". $2."\n";
}
}
into python
pattern = re.compile(r"(\d+)\t(.+)$")
with open(fields_Indexfile,mode="rt",encoding='utf-8') as headerfile:
for line in headerfile:
#sys.stdout.write(line)
m = pattern.match(line)
print(m.group(0))
headerfile.close()
but I must be getting something fundamentally wrong because:
Traceback (most recent call last):
File "./slicer.py", line 30, in <module>
print(m.group(0))
AttributeError: 'NoneType' object has no attribute 'group'
why is 'm' a None?
the input data has this format:
:
3 prop1
4 prop2
5 prop3
Thanks
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