def ask_yes_no(prompt, default=None):
"""Asks a question and returns a boolean (y/n) answer.
If default is given (one of 'y','n'), it is used if the user input is
empty. Otherwise the question is repeated until an answer is given.
An EOF is treated as the default answer. If there is no default, an
exception is raised to prevent infinite loops.
Valid answers are: y/yes/n/no (match is not case sensitive)."""
if default:
prompt = '%s [%s]' % (prompt, default)
return _ask_yes_no(prompt, default)
def ask_yes_no(prompt,default=None):
"""Asks a question and returns a boolean (y/n) answer.
If default is given (one of 'y','n'), it is used if the user input is
empty. Otherwise the question is repeated until an answer is given.
An EOF is treated as the default answer. If there is no default, an
exception is raised to prevent infinite loops.
Valid answers are: y/yes/n/no (match is not case sensitive)."""
if default:
prompt = '%s [%s]' % (prompt, default)
return _ask_yes_no(prompt, default)