Process a perl script within a python script -

i'm trying execute perl script within python script. code below:

command = "/path/to/perl/script/" + "script.pl" input = "< " + "/path/to/file1/" + sys.argv[1] + " >" output = "/path/to/file2/" + sys.argv[1]  subprocess.popen(["perl", command, "/path/to/file1/", input, output]) 

when execute python script, returned:

no info key. 

all path leading perl script files correct.

my perl script executed command:

perl script.pl /path/to/file1/ < input > output 

any advice on appreciate.

the analog of shell command:

#!/usr/bin/env python subprocess import check_call  check_call("perl script.pl /path/to/file1/ < input > output", shell=true) 

is:

#!/usr/bin/env python subprocess import check_call  open('input', 'rb', 0) input_file, \      open('output', 'wb', 0) output_file:     check_call(["perl", "script.pl", "/path/to/file1/"],                stdin=input_file, stdout=output_file) 

to avoid verbose code, use plumbum emulate shell pipeline:

#!/usr/bin/env python plumbum.cmd import perl $ pip install plumbum  ((perl["script.pl", "/path/to/file1"] < "input") > "output")() 

note: code example shell=true runs shell. 2nd , 3rd examples not use shell.