Hi
I am a few months new into python. I have used regexps before in perl
and java but am a little confused with this problem.
I want to parse a number of strings and extract only those that
contain a 4 digit number anywhere inside a string
However the regexp
p = re.compile(r'\d{4}')
Matches even sentences that have longer than 4 numbers inside
strings ..for example it matches "I have 3324234 and more"
I am very confused. Shouldnt the \d{4,} match exactly four digit
numbers so a 5 digit number sentence should not be matched .
Here is my test program output and the test given below
Thanks for your help
Harijay
PyMate r8111 running Python 2.5.1 (/usr/bin/python)
>>> testdigit.py
Matched I have 2004 rupees
Matched I have 3324234 and more
Matched As 3233
Matched 2323423414 is good
Matched 4444 dc sav 2412441 asdf
SKIPPED random1341also and also
SKIPPED
SKIPPED 13
Matched a 1331 saves
SKIPPED and and as dad
SKIPPED A has 13123123
SKIPPED A 13123
SKIPPED 123 adn
Matched 1312 times I have told you
DONE
#!/usr/bin/python
import re
x = [" I have 2004 rupees "," I have 3324234 and more" , " As 3233 " ,
"2323423414 is good","4444 dc sav 2412441 asdf " , "random1341also and
also" ,"","13"," a 1331 saves" ," and and as dad"," A has 13123123","
A 13123","123 adn","1312 times I have told you"]
p = re.compile(r'\d{4} ')
for elem in x:
if re.search(p,elem):
print "Matched " + elem
else:
print "SKIPPED " + elem
print "DONE"
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