Re: [Tutor] How to import modules using the input() command

Thu, 15 Nov 2007 07:57:56 -0800

Mihai Iacob wrote: 
Hello,

I was wondering if there is a way to import modules
using the input() command. If i try to do it directly
it gives me an error:

  
input()
        
import time
The input function takes a character string and attempts to interpret it as a Python _expression_. import is a statement, not an _expression_.

Traceback (most recent call last):
  File "<pyshell#168>", line 1, in <module>
    input()
  File "<string>", line 1
    import time
         ^
SyntaxError: invalid syntax
  


Is there another way in which i can import modules
with the input() command?
Yes:

modname = raw_input()
exec "import " + modname

That can be a security risk, in that a use could enter "time; import os; os.rmdir('some_valuable_directory')"
You could prescan modname for semicolons to reduce the risk.

Safer is:

modname = raw_input()
globals()[modname] = __import__(modname)

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