# regex.py

import re

# US/Canada phone number
rePhone = re.compile(r'''
    # area code
    \(?(\d{3})\)?
    
    # separator
    \ *

    # prefix
    (\d{3})
    
    # separator
    [ \-]
    
    # suffix
    (\d{4})
    ''', re.VERBOSE)

phoneNumbers = [
    '(800)555-1212',
    '650 555 1234',
    '212-555-9876'
    ]

for num in phoneNumbers:
    print num,
    match = rePhone.match(num)
    if match:
        print "matches!"
    else:
        print "doesn't match"

print



# Name swapping
reName = re.compile(r"(?P<last>[^,]+), +(?P<first>.+)")

nameList = [
    "Smith, Joseph",
    "Clinton, William Jefferson",
    "Bush, George W."
    ]

for name in nameList:
    print name, "=>", reName.sub(r"\g<first> \g<last>", name)