Repository: networkx/networkx

Issue:
doc build broken
From a clean checkout I ran `python setup.py install` and then I attempted to build a local copy of the docs via `make html` in `doc` and got the following error:

```
(py2k-base)tcaswell@tcaswellpc1:~/other_source/networkx/doc$ make html
mkdir -p build
./make_gallery.py 
atlas.pyTraceback (most recent call last):
  File "./make_gallery.py", line 57, in <module>
    execfile(example)
  File "atlas.py", line 59, in <module>
    G=atlas6()
  File "atlas.py", line 25, in atlas6
    Atlas=nx.graph_atlas_g()[0:208] # 208
AttributeError: 'module' object has no attribute 'graph_atlas_g'
make: *** [build/generate-stamp] Error 1
```



Discussion:

Resolving patch:
diff --git a/examples/drawing/atlas.py b/examples/drawing/atlas.py
deleted file mode 100644
--- a/examples/drawing/atlas.py
+++ /dev/null
@@ -1,87 +0,0 @@
-#!/usr/bin/env python
-"""
-Atlas of all graphs of 6 nodes or less.
-
-"""
-__author__ = """Aric Hagberg (hagberg@lanl.gov)"""
-#    Copyright (C) 2004 by 
-#    Aric Hagberg <hagberg@lanl.gov>
-#    Dan Schult <dschult@colgate.edu>
-#    Pieter Swart <swart@lanl.gov>
-#    All rights reserved.
-#    BSD license.
-
-import networkx as nx
-#from networkx import *
-#from networkx.generators.atlas import *
-from networkx.algorithms.isomorphism.isomorph import graph_could_be_isomorphic as isomorphic
-import random
-
-def atlas6():
-    """ Return the atlas of all connected graphs of 6 nodes or less.
-        Attempt to check for isomorphisms and remove.
-    """
-
-    Atlas=nx.graph_atlas_g()[0:208] # 208
-    # remove isolated nodes, only connected graphs are left
-    U=nx.Graph() # graph for union of all graphs in atlas
-    for G in Atlas: 
-        zerodegree=[n for n in G if G.degree(n)==0]
-        for n in zerodegree:
-            G.remove_node(n)
-        U=nx.disjoint_union(U,G)
-
-    # list of graphs of all connected components        
-    C=nx.connected_component_subgraphs(U)        
-    
-    UU=nx.Graph()        
-    # do quick isomorphic-like check, not a true isomorphism checker     
-    nlist=[] # list of nonisomorphic graphs
-    for G in C:
-        # check against all nonisomorphic graphs so far
-        if not iso(G,nlist):
-            nlist.append(G)
-            UU=nx.disjoint_union(UU,G) # union the nonisomorphic graphs  
-    return UU            
-
-def iso(G1, glist):
-    """Quick and dirty nonisomorphism checker used to check isomorphisms."""
-    for G2 in glist:
-        if isomorphic(G1,G2):
-            return True
-    return False        
-
-
-if __name__ == '__main__':
-
-    import networkx as nx
-
-    G=atlas6()
-
-    print("graph has %d nodes with %d edges"\
-          %(nx.number_of_nodes(G),nx.number_of_edges(G)))
-    print(nx.number_connected_components(G),"connected components")
-
-
-    try:
-        from networkx import graphviz_layout
-    except ImportError:
-        raise ImportError("This example needs Graphviz and either PyGraphviz or Pydot")
-
-    import matplotlib.pyplot as plt
-    plt.figure(1,figsize=(8,8))
-    # layout graphs with positions using graphviz neato
-    pos=nx.graphviz_layout(G,prog="neato")
-    # color nodes the same in each connected subgraph
-    C=nx.connected_component_subgraphs(G)
-    for g in C:
-        c=[random.random()]*nx.number_of_nodes(g) # random color...
-        nx.draw(g,
-             pos,
-             node_size=40,
-             node_color=c,
-             vmin=0.0,
-             vmax=1.0,
-             with_labels=False
-             )
-    plt.savefig("atlas.png",dpi=75)   
diff --git a/examples/drawing/atlas.py b/examples/drawing/atlas.py
new file mode 120000
--- /dev/null
+++ b/examples/drawing/atlas.py
@@ -0,0 +1 @@
+../graph/atlas.py
\ No newline at end of file


Test patch: