This is a pretty regular scenario so I’ve written an “ignore_exception” decorator that works for all kinds of functions which throw exceptions instead of failing gracefully:
def ignore_exception(IgnoreException=Exception,DefaultVal=None):
""" Decorator for ignoring exception from a function
e.g. @ignore_exception(DivideByZero)
e.g.2. ignore_exception(DivideByZero)(Divide)(2/0)
"""
def dec(function):
def _dec(*args, **kwargs):
try:
return function(*args, **kwargs)
except IgnoreException:
return DefaultVal
return _dec
return dec
Usage in your case:
sint = ignore_exception(ValueError)(int)
print sint("Hello World") # prints none
print sint("1340") # prints 1340