Question

I’m writing a python code to slipt all informations from a .txt. And i have write a code, but come allways error: ‘NoneType’ object has no attribute ‘groupdict’

code:

import re
readfile = open("test.txt")
try:
all_the_text =readfile.read()
m = re.match("(pdflink=[\w\s/]*)author=([\w\s/]*/n)",unicode(all_the_text),flags=re.UNICODE)
m.groupdict()
print m.groupdict()
finally:
readfile.close()
writefile = open('test5.txt','w')
print >> writefile, m.groupdict()
writefile.close()

Please please help me! Thx!

Answer 1

From the Python documentation:

re.match(pattern, string, flags=0)¶
If zero or more characters at the beginning of string match the regular expression pattern, return a corresponding MatchObject instance. Return None if the string does not match the pattern; note that this is different from a zero-length match


In your code, re.match is returning None and storing that in m. So m is None. You then try to call groupdict from m, and you get the aformentioned error. So you should first check to see if m is None before continuing your processing.