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1# Copyright 2018 The TensorFlow Authors. All Rights Reserved. 

2# 

3# Licensed under the Apache License, Version 2.0 (the "License"); 

4# you may not use this file except in compliance with the License. 

5# You may obtain a copy of the License at 

6# 

7# http://www.apache.org/licenses/LICENSE-2.0 

8# 

9# Unless required by applicable law or agreed to in writing, software 

10# distributed under the License is distributed on an "AS IS" BASIS, 

11# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 

12# See the License for the specific language governing permissions and 

13# limitations under the License. 

14# ============================================================================== 

15"""This module implements operators that AutoGraph overloads. 

16 

17Note that "operator" is used loosely here, and includes control structures like 

18conditionals and loops, implemented in functional form, using for example 

19closures for the body. 

20""" 

21 

22# Naming conventions: 

23# * operator names match the name usually used for the respective Python 

24# idiom; examples: for_stmt, list_append 

25# * operator arguments match either of: 

26# - the corresponding Python AST attribute (e.g. the condition of an if 

27# statement is called test) if the operator represents an AST construct 

28# - the names used in the Python docs, if the operator is a function (e.g. 

29# list_ and x for append, see 

30# https://docs.python.org/3.7/tutorial/datastructures.html) 

31# 

32# All operators may accept a final argument named "opts", of a type that 

33# subclasses namedtuple and contains any arguments that are only required 

34# for some specializations of the operator. 

35 

36from tensorflow.python.autograph.operators.conditional_expressions import if_exp 

37from tensorflow.python.autograph.operators.control_flow import for_stmt 

38from tensorflow.python.autograph.operators.control_flow import if_stmt 

39from tensorflow.python.autograph.operators.control_flow import while_stmt 

40from tensorflow.python.autograph.operators.data_structures import list_append 

41from tensorflow.python.autograph.operators.data_structures import list_pop 

42from tensorflow.python.autograph.operators.data_structures import list_stack 

43from tensorflow.python.autograph.operators.data_structures import ListPopOpts 

44from tensorflow.python.autograph.operators.data_structures import ListStackOpts 

45from tensorflow.python.autograph.operators.data_structures import new_list 

46from tensorflow.python.autograph.operators.exceptions import assert_stmt 

47from tensorflow.python.autograph.operators.logical import and_ 

48from tensorflow.python.autograph.operators.logical import eq 

49from tensorflow.python.autograph.operators.logical import not_ 

50from tensorflow.python.autograph.operators.logical import not_eq 

51from tensorflow.python.autograph.operators.logical import or_ 

52from tensorflow.python.autograph.operators.py_builtins import float_ 

53from tensorflow.python.autograph.operators.py_builtins import int_ 

54from tensorflow.python.autograph.operators.py_builtins import len_ 

55from tensorflow.python.autograph.operators.py_builtins import print_ 

56from tensorflow.python.autograph.operators.py_builtins import range_ 

57from tensorflow.python.autograph.operators.slices import get_item 

58from tensorflow.python.autograph.operators.slices import GetItemOpts 

59from tensorflow.python.autograph.operators.slices import set_item 

60from tensorflow.python.autograph.operators.variables import ld 

61from tensorflow.python.autograph.operators.variables import ldu 

62from tensorflow.python.autograph.operators.variables import Undefined 

63from tensorflow.python.autograph.operators.variables import UndefinedReturnValue