--- a/env/lib/python3.7/site-packages/networkx/readwrite/pajek.py	Thu May 14 16:47:39 2020 -0400
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,286 +0,0 @@
-#    Copyright (C) 2008-2014 by
-#    Aric Hagberg <hagberg@lanl.gov>
-#    Dan Schult <dschult@colgate.edu>
-#    Pieter Swart <swart@lanl.gov>
-#    All rights reserved.
-#    BSD license.
-#
-# Authors: Aric Hagberg (hagberg@lanl.gov)
-"""
-*****
-Pajek
-*****
-Read graphs in Pajek format.
-
-This implementation handles directed and undirected graphs including
-those with self loops and parallel edges.
-
-Format
-------
-See http://vlado.fmf.uni-lj.si/pub/networks/pajek/doc/draweps.htm
-for format information.
-
-"""
-
-import warnings
-
-import networkx as nx
-from networkx.utils import is_string_like, open_file, make_str
-
-__all__ = ['read_pajek', 'parse_pajek', 'generate_pajek', 'write_pajek']
-
-
-def generate_pajek(G):
-    """Generate lines in Pajek graph format.
-
-    Parameters
-    ----------
-    G : graph
-       A Networkx graph
-
-    References
-    ----------
-    See http://vlado.fmf.uni-lj.si/pub/networks/pajek/doc/draweps.htm
-    for format information.
-    """
-    if G.name == '':
-        name = 'NetworkX'
-    else:
-        name = G.name
-    # Apparently many Pajek format readers can't process this line
-    # So we'll leave it out for now.
-    # yield '*network %s'%name
-
-    # write nodes with attributes
-    yield '*vertices %s' % (G.order())
-    nodes = list(G)
-    # make dictionary mapping nodes to integers
-    nodenumber = dict(zip(nodes, range(1, len(nodes) + 1)))
-    for n in nodes:
-        # copy node attributes and pop mandatory attributes
-        # to avoid duplication.
-        na = G.nodes.get(n, {}).copy()
-        x = na.pop('x', 0.0)
-        y = na.pop('y', 0.0)
-        id = int(na.pop('id', nodenumber[n]))
-        nodenumber[n] = id
-        shape = na.pop('shape', 'ellipse')
-        s = ' '.join(map(make_qstr, (id, n, x, y, shape)))
-        # only optional attributes are left in na.
-        for k, v in na.items():
-            if is_string_like(v) and v.strip() != '':
-                s += ' %s %s' % (make_qstr(k), make_qstr(v))
-            else:
-                warnings.warn('Node attribute %s is not processed. %s.' %
-                              (k,
-                               'Empty attribute' if is_string_like(v) else
-                               'Non-string attribute'))
-        yield s
-
-    # write edges with attributes
-    if G.is_directed():
-        yield '*arcs'
-    else:
-        yield '*edges'
-    for u, v, edgedata in G.edges(data=True):
-        d = edgedata.copy()
-        value = d.pop('weight', 1.0)  # use 1 as default edge value
-        s = ' '.join(map(make_qstr, (nodenumber[u], nodenumber[v], value)))
-        for k, v in d.items():
-            if is_string_like(v) and v.strip() != '':
-                s += ' %s %s' % (make_qstr(k), make_qstr(v))
-            else:
-                warnings.warn('Edge attribute %s is not processed. %s.' %
-                              (k,
-                               'Empty attribute' if is_string_like(v) else
-                               'Non-string attribute'))
-        yield s
-
-
-@open_file(1, mode='wb')
-def write_pajek(G, path, encoding='UTF-8'):
-    """Write graph in Pajek format to path.
-
-    Parameters
-    ----------
-    G : graph
-       A Networkx graph
-    path : file or string
-       File or filename to write.
-       Filenames ending in .gz or .bz2 will be compressed.
-
-    Examples
-    --------
-    >>> G=nx.path_graph(4)
-    >>> nx.write_pajek(G, "test.net")
-
-    Warnings
-    --------
-    Optional node attributes and edge attributes must be non-empty strings.
-    Otherwise it will not be written into the file. You will need to
-    convert those attributes to strings if you want to keep them.
-
-    References
-    ----------
-    See http://vlado.fmf.uni-lj.si/pub/networks/pajek/doc/draweps.htm
-    for format information.
-    """
-    for line in generate_pajek(G):
-        line += '\n'
-        path.write(line.encode(encoding))
-
-
-@open_file(0, mode='rb')
-def read_pajek(path, encoding='UTF-8'):
-    """Read graph in Pajek format from path.
-
-    Parameters
-    ----------
-    path : file or string
-       File or filename to write.
-       Filenames ending in .gz or .bz2 will be uncompressed.
-
-    Returns
-    -------
-    G : NetworkX MultiGraph or MultiDiGraph.
-
-    Examples
-    --------
-    >>> G=nx.path_graph(4)
-    >>> nx.write_pajek(G, "test.net")
-    >>> G=nx.read_pajek("test.net")
-
-    To create a Graph instead of a MultiGraph use
-
-    >>> G1=nx.Graph(G)
-
-    References
-    ----------
-    See http://vlado.fmf.uni-lj.si/pub/networks/pajek/doc/draweps.htm
-    for format information.
-    """
-    lines = (line.decode(encoding) for line in path)
-    return parse_pajek(lines)
-
-
-def parse_pajek(lines):
-    """Parse Pajek format graph from string or iterable.
-
-    Parameters
-    ----------
-    lines : string or iterable
-       Data in Pajek format.
-
-    Returns
-    -------
-    G : NetworkX graph
-
-    See Also
-    --------
-    read_pajek()
-
-    """
-    import shlex
-    # multigraph=False
-    if is_string_like(lines):
-        lines = iter(lines.split('\n'))
-    lines = iter([line.rstrip('\n') for line in lines])
-    G = nx.MultiDiGraph()  # are multiedges allowed in Pajek? assume yes
-    labels = []  # in the order of the file, needed for matrix
-    while lines:
-        try:
-            l = next(lines)
-        except:  # EOF
-            break
-        if l.lower().startswith("*network"):
-            try:
-                label, name = l.split(None, 1)
-            except ValueError:
-                # Line was not of the form:  *network NAME
-                pass
-            else:
-                G.graph['name'] = name
-        elif l.lower().startswith("*vertices"):
-            nodelabels = {}
-            l, nnodes = l.split()
-            for i in range(int(nnodes)):
-                l = next(lines)
-                try:
-                    splitline = [x.decode('utf-8') for x in
-                                 shlex.split(make_str(l).encode('utf-8'))]
-                except AttributeError:
-                    splitline = shlex.split(str(l))
-                id, label = splitline[0:2]
-                labels.append(label)
-                G.add_node(label)
-                nodelabels[id] = label
-                G.nodes[label]['id'] = id
-                try:
-                    x, y, shape = splitline[2:5]
-                    G.nodes[label].update({'x': float(x),
-                                           'y': float(y),
-                                           'shape': shape})
-                except:
-                    pass
-                extra_attr = zip(splitline[5::2], splitline[6::2])
-                G.nodes[label].update(extra_attr)
-        elif l.lower().startswith("*edges") or l.lower().startswith("*arcs"):
-            if l.lower().startswith("*edge"):
-                # switch from multidigraph to multigraph
-                G = nx.MultiGraph(G)
-            if l.lower().startswith("*arcs"):
-                # switch to directed with multiple arcs for each existing edge
-                G = G.to_directed()
-            for l in lines:
-                try:
-                    splitline = [x.decode('utf-8') for x in
-                                 shlex.split(make_str(l).encode('utf-8'))]
-                except AttributeError:
-                    splitline = shlex.split(str(l))
-
-                if len(splitline) < 2:
-                    continue
-                ui, vi = splitline[0:2]
-                u = nodelabels.get(ui, ui)
-                v = nodelabels.get(vi, vi)
-                # parse the data attached to this edge and put in a dictionary
-                edge_data = {}
-                try:
-                    # there should always be a single value on the edge?
-                    w = splitline[2:3]
-                    edge_data.update({'weight': float(w[0])})
-                except:
-                    pass
-                    # if there isn't, just assign a 1
-#                    edge_data.update({'value':1})
-                extra_attr = zip(splitline[3::2], splitline[4::2])
-                edge_data.update(extra_attr)
-                # if G.has_edge(u,v):
-                #     multigraph=True
-                G.add_edge(u, v, **edge_data)
-        elif l.lower().startswith("*matrix"):
-            G = nx.DiGraph(G)
-            adj_list = ((labels[row], labels[col], {'weight': int(data)})
-                        for (row, line) in enumerate(lines)
-                        for (col, data) in enumerate(line.split())
-                        if int(data) != 0)
-            G.add_edges_from(adj_list)
-
-    return G
-
-
-def make_qstr(t):
-    """Returns the string representation of t.
-    Add outer double-quotes if the string has a space.
-    """
-    if not is_string_like(t):
-        t = str(t)
-    if " " in t:
-        t = r'"%s"' % t
-    return t
-
-
-# fixture for pytest
-def teardown_module(module):
-    import os
-    os.unlink('test.net')