running a command line containing Pipes and displaying result to STDOUT

Question

How would one call a shell command from Python which contains a pipe and capture the output?

Suppose the command was something like:

cat file.log |          


        

Answer 1

This:

import subprocess
p = subprocess.Popen("cat file.log | tail -1", shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE, stdin=subprocess.PIPE)
#for shell=False use absolute paths
p_stdout = p.stdout.read()
p_stderr = p.stderr.read()
print p_stdout

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Or this should work:

import os
result = os.system("cat file.log | tail -1")