Python cannot find the file path to write the output

Question

I have the following static method in Python.

import subprocess   

class ProcessUtility:

    @staticmethod
    def execute_command(url):
        process = None
        process = subprocess.check_output(["phantomas " + url  + " --har=test.har"])
        return process

It command basically writes the output to test.har file. I have created the test.har file in the same directory as that of the script and given it read,write and execute permissions.

Upon executing I get the error.

OSError: [Errno 2] No such file or directory

Any ideas why I keep getting this.

+1 for introducing me to subprocerss.check_output(). It's been so long since I've had to check the docs for subprocess that I'd never noticed the new addition for 2.7. — Chinmay Kanchi
– Chinmay Kanchi, Commented Nov 7, 2014 at 6:29

Chinmay Kanchi · Accepted Answer · 2014-11-07 06:25:40Z

2

Most subprocess functions take a list of arguments as opposed to a string, if shell=False (the default). Try

process = subprocess.check_output(['phantomas', url, '--har=test.har'])

answered Nov 7, 2014 at 6:25

Chinmay Kanchi

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1 Comment

Chinmay Kanchi Over a year ago

Note shell=True can lead to unexpected behaviour. Be sure to check the docs for what it implies (essentially, arguments are interpreted as going to the shell, rather than the program).

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