Python, Canadian Address RegEx validation -

im trying write python script validates canadian addresses using regex.

for example address valid:

 " 123 4th street, toronto, ontario, m1a 1a1 " 

but 1 not valid:

 " 56 winding way, thunder bay, ontario, d56 4a3" 

i have tried many different combinations keeping rules of canadian postal codes such last 6 alphanumeric bits cannot contain letters (d,f,i,o,q,u,w,z) entries seem come out invalid. , tried " ('^[abceghjklmnprstvxy]{1}\d{1}[a-z]{1} *\d{1}[a-z]{1}\d{1}$') " still invalid

this have far

    import re   postalcode = " 123 4th street, toronto, ontario, m1a 1a1 "  #read first line line = postalcode  #validation statement test=re.compile('^\d{1}[abceghjklmnprstvxy]{1}\d{1}[a-z]{1} *\d{1}[a-z]{1}\d{1}$')   if test.match(line) not none:     print 'match found - valid canadian address: ', line else:     print 'error - no match - invalid canadian address:', line 

canadian postal codes can't contain letters d, f, i, o, q, or u, , cannot start w or z:

this work you:

import re  postalcode = " 123 4th street, toronto, ontario, m1a 1a1 " #read first line line = postalcode  if re.search("[abceghjklmnprstvxy][0-9][abceghjklmnprstvwxyz] ?[0-9][abceghjklmnprstvwxyz][0-9]", line , re.ignorecase | re.dotall):     print 'match found - valid canadian address: ', line else:     print 'error - no match - invalid canadian address:', line 

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wrong - 56 winding way, thunder bay, ontario, d56 4a3 correct - 123 4th street, toronto, ontario, m1a 1a1 

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demo

http://ideone.com/qasrut