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absl flags API raise error, UnrecognizedFlagError: Unknown command line flag 'f'

See original GitHub issue

Describe the current behavior:

import sys
from absl import flags
flags.FLAGS(sys.argv)

throws UnrecognizedFlagError: Unknown command line flag 'f' because the iPython call uses the -f flag. This causes a bug in TensorFlow, see https://github.com/tensorflow/tensorflow/issues/40280.

Describe the expected behavior:

It should not be necessary to write special code for Colab. Hence, Colab should not expose the -f flag to sys.argv.

Link (not screenshot!) to a minimal, public, self-contained notebook that reproduces this issue (click the Share button, then Get Shareable Link):

https://colab.research.google.com/gist/AndreasMadsen/5865dc94dab8380c0f001e38daec5a9d/untitled5.ipynb

Issue Analytics

State:
Created 3 years ago
Comments:7 (2 by maintainers)

Top GitHub Comments

13reactions

phoenix-meadowlarkcommented, Jan 7, 2021

You can get around this by putting this cell before the offending call in your notebook:

import sys
from absl import app

# Addresses `UnrecognizedFlagError: Unknown command line flag 'f'`
sys.argv = sys.argv[:1]

# `app.run` calls `sys.exit`
try:
  app.run(lambda argv: None)
except:
  pass

Source: https://github.com/google-research/bleurt/issues/4#issuecomment-635118502

0reactions

pramamu84commented, Oct 23, 2020

Error message: FATAL Flags parsing error: Unknown command line flag ‘f’ Pass --helpshort or --helpfull to see help on flags.

An exception has occurred, use %tb to see the full traceback.

SystemExit: 1