CODEWITHSUNDEEP
python
daniels
daniels

Reputation: 19233

How to get the stdout and stderr for subprocess.call?

I'm using subprocess.call, and I need to get the output for stdout and stderr. How can I do this?

Notice check_output():

Note Do not use stdout=PIPE or stderr=PIPE with this function. As the pipes are not being read in the current process, the child process may block if it generates enough output to a pipe to fill up the OS pipe buffer.

My call might produce a lot of output, so what would be a safe way to get the output?

Upvotes: 0

Views: 143

Answers (2)

serk
serk

Reputation: 4399

Something like this would work:

f = file('output.txt','w')
g = file('err.txt','w')

p = subprocess.Popen(cmd, shell=True, stdout=f, stderr=g)

f.close()
g.close()

Upvotes: 1

Roland Smith
Roland Smith

Reputation: 43553

Create a file object opened for writing and pass that as sdtout and stderr.

Upvotes: 0

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