Mercurial > repos > shellac > guppy_basecaller

comparison env/lib/python3.7/site-packages/networkx/utils/contextmanagers.py @ 2:6af9afd405e9 draft

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"planemo upload commit 0a63dd5f4d38a1f6944587f52a8cd79874177fc1"
author shellac
date Thu, 14 May 2020 14:56:58 -0400
parents 26e78fe6e8c4
children
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1:75ca89e9b81c 2:6af9afd405e9
1
2 from contextlib import contextmanager
3
4 __all__ = [
5 'reversed',
6 ]
7
8
9 @contextmanager
10 def reversed(G):
11 """A context manager for temporarily reversing a directed graph in place.
12
13 This is a no-op for undirected graphs.
14
15 Parameters
16 ----------
17 G : graph
18 A NetworkX graph.
19 """
20 directed = G.is_directed()
21 if directed:
22 G._pred, G._succ = G._succ, G._pred
23 G._adj = G._succ
24
25 try:
26 yield
27 finally:
28 if directed:
29 # Reverse the reverse.
30 G._pred, G._succ = G._succ, G._pred
31 G._adj = G._succ