Commafiy: For those comma separated scenarios

commafy.py

# Used for lastname, firstname situations or 
# when using incomplete addresses
# ', '.join() method doesn't account for blank items
# assumes string; else will break on strip method call

def commafy(*args, **kwargs):
    delimiter = kwargs.get('delimiter', ', ')
    return delimiter.join([i for i in args if i.strip()])

# ideal world: whole address
print commafy('11757 Katy Freeway, Suite 930', 'Houston', 'Texas', '77079')

# real world: partial address
print commafy('11757 Katy Freeway, Suite 930', '  ', '', '77079')
print ', '.join(['11757 Katy Freeway, Suite 930', '  ', '', '77079'])

>> 11757 Katy Freeway, Suite 930, Houston, Texas, 77079
>> 11757 Katy Freeway, Suite 930, 77079
>> 11757 Katy Freeway, Suite 930,   , , 77079