Running a .py file in a loop

问题

I am currently trying to run a .py file but in a loop. Just for a test I am using

I = 0
while I<10:
    os.pause(10)
    open(home/Tyler/desktop/test.py)
    I = I + 1

I am sure this is a very simple question but I can't figure this one out. I would also like to add in the very end of this I have to make this run infinitely and let it run for some other things.

回答1:

There are a few reasons why your code isn't working:

1. Incorrect indentation (this may just be how you copied it on to StackOverflow though).
2. Using os without importing it.
3. Not using quotes for a string.
4. Mis-using the open function; open opens a file for reading and/or writing. To execute a file you probably want to use the os.system.

Here's a version that should work:

import os

i = 0
while i < 10:
    os.pause(10)
    os.system("home/Tyler/desktop/test.py")
    i += 1

回答2:

• Python is indentation-sensitive, and your code is missing indentation after the while statement!

• Running the open command will not run the Python script. You can read what it does here in the docs: https://docs.python.org/2/tutorial/inputoutput.html#reading-and-writing-files

• This stack overflow question talks about how to run Python that's stored in another file How can I make one python file run another?

  I recommend wrapping the code you want to run in a function, e.g.

   def foo():
       print 'hello'
  

  and then saving this in foo.py. From your main script, you can then do:

  import foo
  
  i = 0
  while i < 10:
      foo.foo()
      i += 1
  

• If you want to run something in an infinite loop, you need the condition for the while loop to always be true:

  while True:
      # do thing forever
  

• A note on importing: The example I have given will work if the foo.py file is in the same directory as the main Python file. If it is not, then you should have a read here about how to create Python modules http://www.tutorialspoint.com/python/python_modules.htm

来源：https://stackoverflow.com/questions/35998544/running-a-py-file-in-a-loop