I created this script because i had hard times getting my contacts with phone numbers only from Android to Windows phone. Android exports vCard file together with email contacts, but i don't want them to flood the screen. Neither on Android or Windows i couldn't find any options to filter such contacts. So this small script does a very primitive job and extracts the contacts with phone number into other vcf file.
Hope it's useful for other as well.
Tested to work with vCard version 3.0. Python version 3.4.