How do I open a .py file in python from a .py file in pypy?

Question

My program currently consists of 2 .py files.

I run the main part of the code in pypy (which is much faster) and then I open a second file in python that plots my data using matplotlib.pyplot.

I have managed to open the using:

subprocess.Popen(['C:\\python26\\python.exe ','main_plot.py',])

which opens my second file...

import matplotlib.pyplot as pyplot
def plot_function(NUMBER):
    '''some code that uses the argument NUMBER'''
    pyplot.figure()
    ---plot some data---
    pyplot.show()

However, I would like to be able to pass arguments to the plot_function that opens in python. Is that possible?

Rian Rizvi · Accepted Answer · 2012-12-06T19:47:36.697

2

Yes, the Popen constructor takes a list of length n. See the note here. So just add the arguments to main_plot.py to your list:

subprocess.Popen(['C:\\python26\\python.exe ','main_plot.py','-n',1234])

EDIT (to respond to your edit):

You need to modify main_plot.py to accept a command line argument to call your function. This will do it:

import matplotlib.pyplot as pyplot
def plot_function(NUMBER):
    '''some code that uses the argument NUMBER'''
    pyplot.figure()
    ---plot some data---
    pyplot.show()

import argparse
if __name__=="__main__":
    argp=argparse.ArgumentParser("plot my function")
    argp.add_argument("-n","--number",type=int,default=0,required=True,help="some argument NUMBER, change type and default accordingly")
    args=argp.parse_args()
    plot_function(args.number)

edited Dec 06 '12 at 19:47

answered Dec 06 '12 at 19:38

Rian Rizvi

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What I really want to do is pass a number into a function in my plotting file. Is it possible to do this? What is the '-f' used for? – user1696811 Dec 06 '12 at 19:47
Thanks, this does exactly what I needed! (I'm not sure what `dbo=DB()` did though. It gave me an error so I deleted it and the program seems to run fine) – user1696811 Dec 06 '12 at 19:59
on a side note... If I was to try an run the code on Mac OS, do you know how the `C:\\python26\\python.exe` line would be different? – user1696811 Dec 06 '12 at 20:55
1

You will just write python without any path on a Mac because it is preinstalled and on the path. But more generally, you use forward slashes instead of backslashes to refer to files on *NIX system eg /Users/yourloginname/somefile – Rian Rizvi Dec 06 '12 at 21:12

score 0 · Answer 2 · answered Dec 06 '12 at 19:38

0

the easiest way is os.system("main_plot.py arg")

answered Dec 06 '12 at 19:38

Lotzki

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How do I open a .py file in python from a .py file in pypy?

2 Answers2