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"""Implementation of the flags interface."""
import tensorflow.python.platform
import argparse
_global_parser = argparse.ArgumentParser()
class _FlagValues(object):
def __init__(self):
"""Global container and accessor for flags and their values."""
self.__dict__['__flags'] = {}
self.__dict__['__parsed'] = False
def _parse_flags(self):
result = _global_parser.parse_args()
for flag_name, val in vars(result).items():
self.__dict__['__flags'][flag_name] = val
self.__dict__['__parsed'] = True
def __getattr__(self, name):
"""Retrieves the 'value' attribute of the flag --name."""
if not self.__dict__['__parsed']:
self._parse_flags()
if name not in self.__dict__['__flags']:
raise AttributeError(name)
return self.__dict__['__flags'][name]
def __setattr__(self, name, value):
"""Sets the 'value' attribute of the flag --name."""
if not self.__dict__['__parsed']:
self._parse_flags()
self.__dict__['__flags'][name] = value
def _define_helper(flag_name, default_value, docstring, flagtype):
"""Registers 'flag_name' with 'default_value' and 'docstring'."""
_global_parser.add_argument("--" + flag_name,
default=default_value,
help=docstring,
type=flagtype)
# Provides the global object that can be used to access flags.
FLAGS = _FlagValues()
def DEFINE_string(flag_name, default_value, docstring):
"""Defines a flag of type 'string'.
Args:
flag_name: The name of the flag as a string.
default_value: The default value the flag should take as a string.
docstring: A helpful message explaining the use of the flag.
"""
_define_helper(flag_name, default_value, docstring, str)
def DEFINE_integer(flag_name, default_value, docstring):
"""Defines a flag of type 'int'.
Args:
flag_name: The name of the flag as a string.
default_value: The default value the flag should take as an int.
docstring: A helpful message explaining the use of the flag.
"""
_define_helper(flag_name, default_value, docstring, int)
def DEFINE_boolean(flag_name, default_value, docstring):
"""Defines a flag of type 'boolean'.
Args:
flag_name: The name of the flag as a string.
default_value: The default value the flag should take as a boolean.
docstring: A helpful message explaining the use of the flag.
"""
_define_helper(flag_name, default_value, docstring, bool)
_global_parser.add_argument('--no' + flag_name,
action='store_false',
dest=flag_name)
def DEFINE_float(flag_name, default_value, docstring):
"""Defines a flag of type 'float'.
Args:
flag_name: The name of the flag as a string.
default_value: The default value the flag should take as a float.
docstring: A helpful message explaining the use of the flag.
"""
_define_helper(flag_name, default_value, docstring, float)
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