pyt...@bdurham.com schrieb: > What's the Pythonic way to determine if a string is a number? By > number I mean a valid integer or float. > > I searched the string and cMath libraries for a similar function > without success. I can think of at least 3 or 4 ways to build my > own function. > > Here's what I came up with as a proof-of-concept. Are there > 'better' ways to perform this type of test? > > Thanks, > Malcolm > > <code> > def isnumber( input ): > try: > if '.' in input: > num = float( input ) > else: > num = int( input ) > return True > > except ValueError: > return False
You code doesn't check for several float representations like "1e10", "1E10", "inf" and "nan". Christian -- http://mail.python.org/mailman/listinfo/python-list
