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annotate planemo/lib/python3.7/site-packages/networkx/readwrite/nx_yaml.py @ 1:56ad4e20f292 draft

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"planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
author guerler
date Fri, 31 Jul 2020 00:32:28 -0400
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1
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1 """
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2 ****
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3 YAML
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4 ****
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5 Read and write NetworkX graphs in YAML format.
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6
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7 "YAML is a data serialization format designed for human readability
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8 and interaction with scripting languages."
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9 See http://www.yaml.org for documentation.
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10
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11 Format
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12 ------
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13 http://pyyaml.org/wiki/PyYAML
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14
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15 """
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16 __author__ = """Aric Hagberg (hagberg@lanl.gov)"""
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17 # Copyright (C) 2004-2019 by
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18 # Aric Hagberg <hagberg@lanl.gov>
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19 # Dan Schult <dschult@colgate.edu>
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20 # Pieter Swart <swart@lanl.gov>
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21 # All rights reserved.
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22 # BSD license.
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23
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24 __all__ = ['read_yaml', 'write_yaml']
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25
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26 import networkx as nx
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27 from networkx.utils import open_file
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28
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29
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30 @open_file(1, mode='w')
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31 def write_yaml(G_to_be_yaml, path_for_yaml_output, **kwds):
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32 """Write graph G in YAML format to path.
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33
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34 YAML is a data serialization format designed for human readability
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35 and interaction with scripting languages [1]_.
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36
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37 Parameters
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38 ----------
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39 G : graph
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40 A NetworkX graph
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41 path : file or string
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42 File or filename to write.
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43 Filenames ending in .gz or .bz2 will be compressed.
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44
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45 Notes
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46 -----
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47 To use encoding on the output file include e.g. `encoding='utf-8'`
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48 in the keyword arguments.
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49
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50 Examples
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51 --------
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52 >>> G=nx.path_graph(4)
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53 >>> nx.write_yaml(G,'test.yaml')
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54
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55 References
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56 ----------
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57 .. [1] http://www.yaml.org
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58 """
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59 try:
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60 import yaml
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61 except ImportError:
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62 raise ImportError("write_yaml() requires PyYAML: http://pyyaml.org/")
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63 yaml.dump(G_to_be_yaml, path_for_yaml_output, **kwds)
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64
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65
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66 @open_file(0, mode='r')
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67 def read_yaml(path):
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68 """Read graph in YAML format from path.
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69
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70 YAML is a data serialization format designed for human readability
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71 and interaction with scripting languages [1]_.
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72
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73 Parameters
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74 ----------
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75 path : file or string
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76 File or filename to read. Filenames ending in .gz or .bz2
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77 will be uncompressed.
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78
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79 Returns
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80 -------
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81 G : NetworkX graph
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82
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83 Examples
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84 --------
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85 >>> G=nx.path_graph(4)
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86 >>> nx.write_yaml(G,'test.yaml')
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87 >>> G=nx.read_yaml('test.yaml')
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88
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89 References
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90 ----------
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91 .. [1] http://www.yaml.org
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92
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93 """
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94 try:
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95 import yaml
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96 except ImportError:
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97 raise ImportError("read_yaml() requires PyYAML: http://pyyaml.org/")
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98
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99 G = yaml.load(path, Loader=yaml.FullLoader)
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100 return G
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101
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102
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103 # fixture for pytest
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104 def setup_module(module):
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105 try:
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106 import yaml
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107 except:
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108 from pytest import skip
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109 skip("PyYAML not available", allow_module_level=True)
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110
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111 # fixture for pytest
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112 def teardown_module(module):
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113 import os
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114 os.unlink('test.yaml')