The script for this example is in the 08/07_degrees_of_separation.py. The code is identical to the previous recipe, with a 2-depth crawl, except that it omits the graph and asks NetworkX to solve the degrees of separation between Python_(programming_language) and Dennis_Ritchie:
Degrees of separation: 1 Python_(programming_language) C_(programming_language) Dennis_Ritchie
This tells us that to go from Python_(programming_language) to Dennis_Ritchie we have to go through one other page: C_(programming_language). Hence, one degree of separation. If we went directly to C_(programming_language), it would be 0 degrees of separation.
