CODEWITHSUNDEEP
pythonfilenamesstdin
Pengibaby
Pengibaby

Reputation: 373

Python: get name of file piped to stdin

I have a python program that reads input from stdin (required), and processes lines from stdin:

for lines in stdin:
     #do stuff to lines
     filename = #need file name
     #example print
     print(filename)

However, in this for loop, I also need to get the name of the file that has been piped in to this python program like this:

cat document.txt | pythonFile.py #should print document.txt with the example print

Is there a way to do this?

Upvotes: 0

Views: 562

Answers (1)

ypnos
ypnos

Reputation: 52337

No, this is not possible. As the receiving end of a pipe you have no knowledge where your data stream is coming from. The use of cat further obfuscates it, but even if you would write ./pythonFile.py < document.txt you would have no clue.

Many unix tools accept filenames as argument and - as a special code for 'stdin'. You could design your script the same way, so it can be called like

  • cat document.txt | pythonFile.py - (your script doesn't know the input origin)
  • ./pythonFile.py document.txt (your script does know the file)

Upvotes: 1

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