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#!/usr/bin/env python3
#
# Copyright 2019, The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Helper util libraries for debug printing."""
import sys
DEBUG = False
def debug_print(*args, **kwargs):
"""Prints the args to sys.stderr if the DEBUG is set."""
if DEBUG:
print(*args, **kwargs, file=sys.stderr)
def error_print(*args, **kwargs):
print('[ERROR]:', *args, file=sys.stderr, **kwargs)
def _expand_gen_repr(args):
"""Like repr but any generator-like object has its iterator consumed
and then called repr on."""
new_args_list = []
for i in args:
# detect iterable objects that do not have their own override of __str__
if hasattr(i, '__iter__'):
to_str = getattr(i, '__str__')
if to_str.__objclass__ == object:
# the repr for a generator is just type+address, expand it out instead.
new_args_list.append([_expand_gen_repr([j])[0] for j in i])
continue
# normal case: uses the built-in to-string
new_args_list.append(i)
return new_args_list
def debug_print_gen(*args, **kwargs):
"""Like _debug_print but will turn any iterable args into a list."""
if not DEBUG:
return
new_args_list = _expand_gen_repr(args)
debug_print(*new_args_list, **kwargs)
def debug_print_nd(*args, **kwargs):
"""Like _debug_print but will turn any NamedTuple-type args into a string."""
if not DEBUG:
return
new_args_list = []
for i in args:
if hasattr(i, '_field_types'):
new_args_list.append("%s: %s" % (i.__name__, i._field_types))
else:
new_args_list.append(i)
debug_print(*new_args_list, **kwargs)
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