On Mar 3, 11:44 am, Chris Rebert <c...@rebertia.com> wrote: > On Tue, Mar 3, 2009 at 9:03 AM, Mike Driscoll <kyoso...@gmail.com> wrote: > > - Show quoted text - > > On Mar 3, 10:57 am, Oltmans <rolf.oltm...@gmail.com> wrote: > >> I'm reading from a file that contains text like > > >> ---- > >> 5 > >> google_company > >> apple_fruit > >> pencil_object > >> 4 > >> test_one > >> tst_two > >> ---- > > >> When I read the integer 5 I want to make sure it's an integer. > >> Likewise, for strings, I want to make sure if something is indeed a > >> string. So how do I check types in Python? I want to check following > >> types > > >> 1- integers > >> 2- strings > >> 3- testing types of a particular class > >> 4- decimal/floats > > >> Please excuse my ignorance & enlighten me. I will really appreciate > >> any help. > > >> Thanks, > >> Oltmans > > > I think when you're reading from a file, it will just read each line > > as a string. So you'd probably need to either try casting the line > > into something else and catch it in an exception handler or use eval. > > > The normal way to check types is to use the keyword isinstance or just > > use the "type" keyword. > > isinstance() and type() are callables, *not* keywords; and IMHO, > type() should never be used for typechecking (ironically), since such > checks are always written more clearly using isinstance(). > > Cheers, > Chris > > -- > I have a blog:http://blog.rebertia.com
Yeah, I never use type except in IDLE or for debugging purposes. But IDLE does change their color, so they are builtins, so I thought keywords was a more understandable term for a newb. Mike -- http://mail.python.org/mailman/listinfo/python-list
