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How can I make one python file to run another?
For example I have two .py files. I want one file to be run, and then have it run the other .py file.
There are more than a few ways. I’ll list them in order of inverted preference (i.e., best first, worst last):
- Treat it like a module:
import file. This is good because it’s secure, fast, and maintainable. Code gets reused as it’s supposed to be done. Most Python libraries run using multiple methods stretched over lots of files. Highly recommended. Note that if your file is called
importshould not include the
.pyextension at the end.
- The infamous (and unsafe) exec command: Insecure, hacky, usually the wrong answer. Avoid where possible.
execfile('file.py')in Python 2
exec(open('file.py').read())in Python 3
- Spawn a shell process:
os.system('python file.py'). Use when desperate.
Get one python file to run another, using python 2.7.3 and Ubuntu 12.10:
Put this in main.py:
#!/usr/bin/python import yoursubfile
Put this in yoursubfile.py
There are 8 ways to answer this question, A more canonical answer is here: How to import other Python files?
I used subprocess.call it’s almost same like subprocess.Popen
from subprocess import call call(["python", "your_file.py"])
- you can run your .py file simply with this code:
import os os.system('python filename.py')
put the file in the same directory of your main python file.
from subprocess import Popen Popen('python filename.py')
You could use this script:
def run(runfile): with open(runfile,"r") as rnf: exec(rnf.read())
You’d treat one of the files as a python module and make the other one import it (just as you import standard python modules). The latter can then refer to objects (including classes and functions) defined in the imported module. The module can also run whatever initialization code it needs. See http://docs.python.org/tutorial/modules.html
It may be called
abc.py from the main script as below:
#!/usr/bin/python import abc
abc.py may be something like this: