Set abseil / Tensorflow flags from python script

test.py

"""Example for passing Tensorflow configuration variables from python script.

Many tensorflow scripts variable are defined with absl, which parses inputs from
command line by default. Here is a way to set the flags in a python script.
"""
from absl import flags

FLAGS = flags.FLAGS

flags.DEFINE_integer('my_version', 0, 'Version number.')
flags.DEFINE_string('filename', None, 'Input file name.', short_name='f')

flags.register_validator('my_version',
                         lambda value: value % 2 == 0,
                         message='--my_version must be divisible by 2')
flags.mark_flag_as_required('filename')

# pass arguments into FLAGS parser
# https://github.com/abseil/abseil-py/blob/62b0407d5e6cd3912d2c7d130cffdf6613018260/absl/flags/_flagvalues.py#L595
FLAGS(['', '--filename=best'])
print(FLAGS.filename)