How to run a Tcl Script in a folder in Python?

Question

I have a Tcl script stored in C:/ How do I run it from Python? (It is not write the Tcl script in python and then run it)

To clarify my question, firstly I have a Tcl-based programme called oommf, which is used for simulation. Here is a short introduction http://math.nist.gov/oommf/

I wrote some scripts by this programme and would like to use python to run a series of simulation and then extract the data to plot some graph. The script in in .mif format, and what I wish to do is

Use python to generate the .mif script, every time with different parameter
Use python to call the Tcl-based programme to run the script
Save the data and use python to extract and plot the graph

The Tcl programme is in .tcl format.

The Tcl programme can also be run in command line. I heard that there was some way to simulate command line in python(in windows environment), but I don't know and if any one knows, it would help much.

(Sorry my prior knowledge for programming is only a bit in C, that's why my question might be ambiguous because I don't know how to describe it more clearly)

Louis · Accepted Answer · 2014-05-28 09:33:35Z

0

Try with subprocess.call

subprocess.call will avoid problems with having to deal with quoting conventions of various shells. It accepts a list, rather than a string, so arguments are more easily delimited. i.e.

import subprocess
subprocess.call(['C:\\Temp\\a b c\\Notepad.exe', 'C:\\test.txt'])

answered May 28, 2014 at 9:33

Louis

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3 Comments

Donal Fellows Over a year ago

You should update your answer to be more closely relevant to the question (i.e., tclsh.exe instead of Notepad.exe, and test.tcl instead of test.txt).

littleHui Over a year ago

Thanks for your advice. I have updated my question and could you help a bit?

Louis Over a year ago

@littleHui : what help do you need ?

Hai Vu · Accepted Answer · 2014-05-29 06:03:44Z

0

Here is a suggestion. Much of it is guessing since I don't know exactly what you want to do.

import subprocess

# 1. Code to generate .mif script, for example: my.mif
with open('my.mif', 'wb') as f:
    f.write('something')

# 2. Launch oommf. I am guessing the command line, based on your 
# description and based on what the location of tclsh in my system
cmd = ['C:/Tcl/bin/tclsh.exe', 'C:/oomf.tcl', 'my.mif']
process = subprocess.Popen(cmd, 
        stdout=subprocess.PIPE, 
        stderr=subprocess.PIPE)
stdout, stderr = process.communicate()

# 3. Now, you can do something with stdout and stderr if needed
# Below is just an example
with open('data.txt', 'wb') as f:
    f.write(stdout)

answered May 29, 2014 at 6:03

Hai Vu

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