CODEWITHSUNDEEP
python
Nik I.
Nik I.

Reputation: 187

Executing complex python scripts from within python

I have a python script that has a method that takes in a string that contains another python script. I'd like to execute that script, call a function in it, and then use that function's results in my main script. It currently looks something like this:

def executePythonScript(self, script, param):
        print 'Executing script'
        try:
            code = compile(script, '<string>', 'exec')
            exec code
            response = process(param)
        except Exception as ex:
            print ex
        print 'Response: ' + response
        return response

The "process" function is assumed to exist in the script that gets compiled and executed run-time.

This solution works well for VERY simple scripts, like:

def process():
     return "Hello"

...but I'm having no luck getting more complex scripts to execute. For instance, if my script uses the json package, I get:

global name 'json' is not defined

Additionally, if my process function refers to another function in that same script, I'll get an error there as well:

def process():
  return generateResponse()

def generateResponse():
  return "Hello"

...gives me an error:

global name 'generateResponse' is not defined

Is this an issue of namespacing? How come json (which is a standard python package) does not get recognized? Any advice would be appreciated!

Upvotes: 1

Views: 185

Answers (1)

Casey
Casey

Reputation: 429

import subprocess

subprocess.call(["python","C:/path/to/my/script.py"])

I would recommend against this and just use import.

This is also under the assumption that your PYTHONPATH is set in your environment variables.

Upvotes: 1

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