[Tutor] Import module function using variable

[Alan Gauld]

On 13/06/18 02:52, Slater, Joseph C. wrote:

> I am trying to import a function in a module by variable name. 

I'd suggest getattr():

>>> import sys
>>> xt = getattr(sys,exit)
>>> xt()

Alternatively, if its a fixed set of options
(and it sound as if it is) set up a dictionary:

funcs = {'exit': sys.exit, size: sys.getsizeof)

xt = funcs('exit')
xt()

Which has the advantage of providing a menu
of friendly function names to the user:

for func in funcs:
   print(func)
fn = input('choose a function from the list above')

And allows you to validate the selection

if fn in funcs.keys():
   f = funcs[fn]
else: print(...)


HTH
-- 
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/
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