Licheng Fang schrieb: > I wrote a function with a list as its parameter. And the function has > to perform different operations based on the datatypes of the elements. > How can I decide whether an object is, say, a list or a string? > > Thanks. >
To check if an object is of a particular type use isinstance(), to get the type of an object use type(). You can read more about this two function in the built-in functions documentation <http://www.python.org/doc/2.4.2/lib/built-in-funcs.html>. The types module <http://www.python.org/doc/2.4.2/lib/module-types.html> may also help you. Small example: a_list = [1, "two", [3], (4,), {5: 5}] for item in a_list: if isinstance(item, list): print "It's a list" else: print type(item) Bye, Dennis -- http://mail.python.org/mailman/listinfo/python-list
