CODEWITHSUNDEEP
pythonlistsubprocess
dross
dross

Reputation: 1759

Reference file during subprocess (Python)

Got list that gets written out to a file:

f=open('/tmp/list.txt','w')

f.write(list)

Contents of f needs to then be used in subprocess

process = subprocess.Popen('oscommand **--file=f**, shell=True, stdout=subprocess.PIPE)

How can contents of f be read in by oscommand ?

Upvotes: 2

Views: 87

Answers (1)

falsetru
falsetru

Reputation: 369094

You need to pass file name to sub-process command, not file object:

f = open('/tmp/list.txt','w')
f.write(list)
f.close()  # Make sure to close the file before call sub-process.
           # Otherwise, file content will not visible to sub-process.

process = subprocess.Popen('oscommand --file={}'.format(f.name),
                           shell=True, stdout=subprocess.PIPE)

Upvotes: 3

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