Coverage for melissa/utility/functools.py: 100%

1#!/usr/bin/python3 

2 

3# Copyright (c) 2022, Institut National de Recherche en Informatique et en Automatique (Inria) 

4# All rights reserved. 

5# 

6# Redistribution and use in source and binary forms, with or without 

7# modification, are permitted provided that the following conditions are met: 

8# 

9# * Redistributions of source code must retain the above copyright notice, this 

10# list of conditions and the following disclaimer. 

11# 

12# * Redistributions in binary form must reproduce the above copyright notice, 

13# this list of conditions and the following disclaimer in the documentation 

14# and/or other materials provided with the distribution. 

15# 

16# * Neither the name of the copyright holder nor the names of its 

17# contributors may be used to endorse or promote products derived from 

18# this software without specific prior written permission. 

19# 

20# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 

21# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 

22# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 

23# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE 

24# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 

25# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 

26# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 

27# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 

28# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 

29# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 

30 

31""" 

32Helper functions for the launcher's functional code. 

33""" 

34 

35from typing import Callable, Iterable, List, Tuple, TypeVar 

36 

37T = TypeVar("T") 

38 

39 

40def partition(predicate: Callable[[T], bool], 

41 xs: Iterable[T]) -> Tuple[List[T], List[T]]: 

42 """Separates an iterable into two parts satisfying a given predicate.""" 

43 trues = [] # type: List[T] 

44 falses = [] # type: List[T] 

45 for x in xs: 

46 if predicate(x): 

47 trues.append(x) 

48 else: 

49 falses.append(x) 

50 return trues, falses