Input Types

[Jeff Epler]

On Sat, May 15, 2004 at 08:23:51PM +0200, moma wrote:
> You can send functions (int, float) and exceptions as parameters?
> Amazing.

You sure can.

numbers, sequences, dicts, functions, exceptions, classes, modules: all
these things are objects, and you can pass any object you like as a
parameter.  Of course, not all object types *make sense* everywhere!

One "exception" to this rule is thinking that print is a function, and
trying to write
    def send_to(value, action):
            return action(value)

    def f(x): return x*x

>>> send_to(3, f)     # square the argument: works
9
>>> send_to(3, print) # Print the argument: error
  File "<stdin>", line 1
    send_to(3, print)
                   ^
SyntaxError: invalid syntax

because print is a statement, not a function, this isn't really an
exception to the rule at all.

Jeff