Python 2.6+ str.format() and regular expressions

Question

Using str.format() is the new standard for formatting strings in Python 2.6, and Python 3. I\'ve run into an issue when using str.format() with reg

Answer 1

Per the documentation, if you need a literal { or } to survive the formatting opertation, use {{ and }} in the original string.

'^(w{{3}}\.)?([0-9A-Za-z-]+\.){{1}}{domainName}$'.format(domainName = 'delivery.com')