Football#

Load football network in GML format and compute some network statistcs.

Shows how to download GML graph in a zipped file, unpack it, and load into a NetworkX graph.

Requires Internet connection to download the URL http://www-personal.umich.edu/~mejn/netdata/football.zip

Traceback (most recent call last):
  File "/builddir/build/BUILD/networkx-networkx-2.8/examples/graph/plot_football.py", line 24, in <module>
    sock = urllib.request.urlopen(url)  # open URL
  File "/usr/lib64/python3.10/urllib/request.py", line 216, in urlopen
    return opener.open(url, data, timeout)
  File "/usr/lib64/python3.10/urllib/request.py", line 519, in open
    response = self._open(req, data)
  File "/usr/lib64/python3.10/urllib/request.py", line 536, in _open
    result = self._call_chain(self.handle_open, protocol, protocol +
  File "/usr/lib64/python3.10/urllib/request.py", line 496, in _call_chain
    result = func(*args)
  File "/usr/lib64/python3.10/urllib/request.py", line 1377, in http_open
    return self.do_open(http.client.HTTPConnection, req)
  File "/usr/lib64/python3.10/urllib/request.py", line 1351, in do_open
    raise URLError(err)
urllib.error.URLError: <urlopen error [Errno -3] Temporary failure in name resolution>

import urllib.request
import io
import zipfile

import matplotlib.pyplot as plt
import networkx as nx

url = "http://www-personal.umich.edu/~mejn/netdata/football.zip"

sock = urllib.request.urlopen(url)  # open URL
s = io.BytesIO(sock.read())  # read into BytesIO "file"
sock.close()

zf = zipfile.ZipFile(s)  # zipfile object
txt = zf.read("football.txt").decode()  # read info file
gml = zf.read("football.gml").decode()  # read gml data
# throw away bogus first line with # from mejn files
gml = gml.split("\n")[1:]
G = nx.parse_gml(gml)  # parse gml data

print(txt)
# print degree for each team - number of games
for n, d in G.degree():
    print(f"{n:20} {d:2}")

options = {"node_color": "black", "node_size": 50, "linewidths": 0, "width": 0.1}

pos = nx.spring_layout(G, seed=1969)  # Seed for reproducible layout
nx.draw(G, pos, **options)
plt.show()

Total running time of the script: ( 0 minutes 0.007 seconds)

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