Lecture "Organising information: graphs", exercise 1

[essepuntato]

Consider the list of co-authors of Tim Berners-Lee as illustrated in the write box at http://dblp.uni-trier.de/pers/hd/b/Berners=Lee:Tim. Build an undirected graph that contains Tim Berners Lee as the central node and that is linked to other five nodes representing his top-five co-authors. In addition, specify the weight of each edge as an attribute, where the value of the weight is the number of bibliographic resources (articles, proceedings, etc.) Tim Berners-Lee has co-authored with the person linked by that edge.

[SeverinJB]

from networkx import MultiGraph

network_tim = MultiGraph()

network_tim.add_node("Tim Berners-Lee")
network_tim.add_node("Christian Bizer")
network_tim.add_node("Tom Heath")
network_tim.add_node("Sören Auer")
network_tim.add_node("Lalana Kagal")
network_tim.add_node("James A. Hendler")
network_tim.add_node("Daniel J. Weitzner")

network_tim.add_edge("Tim Berners-Lee", "Christian Bizer", weight=17)
network_tim.add_edge("Tim Berners-Lee", "Tom Heath", weight=17)
network_tim.add_edge("Tim Berners-Lee", "Sören Auer", weight=10)
network_tim.add_edge("Tim Berners-Lee", "Lalana Kagal", weight=9)
network_tim.add_edge("Tim Berners-Lee", "James A. Hendler", weight=8)
network_tim.add_edge("Tim Berners-Lee", "Daniel J. Weitzner", weight=8)

print(network_tim.nodes(data=True))
print(network_tim.edges(data=True))

[EleonoraPeruch]

from networkx import Graph

# top five co-authors of Tim Berners-Lee
# Christian Bizer (17)
# Tom Heath (17)
# Sören Auer (10)
# Lalana Kagal (9)
# James A. Hendler (8)

# create a new graph
tim_berners_lee = Graph()

# create six nodes
tim_berners_lee.add_node("Tim Berners-Lee")
tim_berners_lee.add_node("Christian Bizer")
tim_berners_lee.add_node("Tom Heath")
tim_berners_lee.add_node("Sören Auer")
tim_berners_lee.add_node("Lalana Kagal")
tim_berners_lee.add_node("James A. Hendler")

# create five edges
tim_berners_lee.add_edge("Tim Berners-Lee", "Christian Bizer", weight=17)
tim_berners_lee.add_edge("Tim Berners-Lee", "Tom Heath", weight=17)
tim_berners_lee.add_edge("Tim Berners-Lee", "Sören Auer", weight=10)
tim_berners_lee.add_edge("Tim Berners-Lee", "Lalana Kagal", weight=9)
tim_berners_lee.add_edge("Tim Berners-Lee", "James A. Hendler", weight=8)

print(tim_berners_lee.nodes(data=True))
print(tim_berners_lee.edges(data=True))

[('Tim Berners-Lee', {}), ('Christian Bizer', {}), ('Tom Heath', {}), ('Sören Auer', {}), ('Lalana Kagal', {}), ('James A. Hendler', {})]
[('Tim Berners-Lee', 'Christian Bizer', {'weight': 17}), ('Tim Berners-Lee', 'Tom Heath', {'weight': 17}), ('Tim Berners-Lee', 'Sören Auer', {'weight': 10}), ('Tim Berners-Lee', 'Lalana Kagal', {'weight': 9}), ('Tim Berners-Lee', 'James A. Hendler', {'weight': 8})]

[friendlynihilist]

from networkx import Graph
cs_bib = Graph()

#add nodes
cs_bib.add_node("Tim Berners-Lee")
cs_bib.add_node("Christian Bizer")
cs_bib.add_node("Tom Heath")
cs_bib.add_node("Sören Auer")
cs_bib.add_node("Lalana Kagal")
cs_bib.add_node("James A. Hendler")

#add edges with 'weight' attribute
cs_bib.add_edge("Tim Berners-Lee", "Christian Bizer", weight=17)
cs_bib.add_edge("Tim Berners-Lee", "Tom Heath", weight=17)
cs_bib.add_edge("Tim Berners-Lee", "Sören Auer", weight=10)
cs_bib.add_edge("Tim Berners-Lee", "Lalana Kagal", weight=9)
cs_bib.add_edge("Tim Berners-Lee", "James A. Hendler", weight=8)

print(cs_bib.nodes(data=True))
print(cs_bib.edges(data=True))

#memo:
#tim berners-lee
#christian bizer 17
#tom heath 17
#sören auer 10
#lalana kagal 9
#james a. hendler 8

[andreamust]

from networkx import Graph

my_graph = Graph()

my_graph.add_node(1, name = "Tim", surname = "Berners-Lee")
my_graph.add_node(2, name = "Tom", surname = "Heat")
my_graph.add_node(3, name = "Christian", surname = "Bizer")
my_graph.add_node(4, name = "Soren", surname = "Auer")
my_graph.add_node(5, name = "Lalana", surname = "Kagal")
my_graph.add_node(6, name = "Daniel J.", surname = "Weitzner")


my_graph.add_edge(1, 2, weight = 17)
my_graph.add_edge(1, 3, weight = 17)
my_graph.add_edge(1, 4, weight = 10)
my_graph.add_edge(1, 5, weight = 9)
my_graph.add_edge(1, 6, weight = 8)


print(my_graph.nodes(data=True))
print(my_graph.edges(data=True))

[saraarmaroli]

from networkx import Graph

tim_berners_graph = MultiGraph()
tim_berners_graph.add_node("Tim Berners Lee")
tim_berners_graph.add_node("Christian Bizer")
tim_berners_graph.add_node("Tom Heath")
tim_berners_graph.add_node("Sören Auer")
tim_berners_graph.add_node("Michael Hausenblas")
tim_berners_graph.add_node("Kingsley Idehen")

tim_berners_graph.add_edge("Tim Berners Lee", "Christian Bizer", weight=17)
tim_berners_graph.add_edge("Tim Berners Lee", "Tom Heath", weight=17)
tim_berners_graph.add_edge("Tim Berners Lee", "Sören Auer", weight=8)
tim_berners_graph.add_edge("Tim Berners Lee", "Michael Hausenblas", weight=5)
tim_berners_graph.add_edge("Tim Berners Lee", "Kingsley Idehen",  weight=4)

print(tim_berners_graph.nodes(data=True))
print(tim_berners_graph.edges(data=True))

[MilenaCorbellini]

from networkx import MultiGraph
lee_graph= MultiGraph()

lee_graph.add_node('Tim Berners-Lee')
lee_graph.add_node('Cristian Bizer')
lee_graph.add_node('Tom Heath')
lee_graph.add_node('Soren Auer')
lee_graph.add_node('Lalana Kagal')
lee_graph.add_node('James A. Hendler')
lee_graph.add_node('Daniel J. Weitzner')

lee_graph.add_edge('Tim Berners-Lee', 'Christian Bizer', weight=17)
lee_graph.add_edge('Tim Berners-Lee', 'Tom Heath', weight=17)
lee_graph.add_edge('Tim Berners-Lee', 'Soren Auer', weight=10)
lee_graph.add_edge('Tim Berners-Lee', 'Lalana Kagal', weight=9)
lee_graph.add_edge('Tim Berners-Lee', 'James A. Hendler', weight=8)
lee_graph.add_edge('Tim Berners-Lee', 'Daniel J. Weitzner', weight=8)

print(lee_graph.nodes(data= True))
`print(lee_graph.edges(data=True))
```

[lisasiurina]

from networkx import Graph

authors = Graph()

authors.add_node("Tim Berners-Lee")
authors.add_node("Christian Bizer")
authors.add_node("Tom Heath")
authors.add_node("Sören Auer")
authors.add_node("Lalana Kagal")
authors.add_node("James A. Hendler")

authors.add_edge("Tim Berners-Lee", "Christian Bizer", weight=17)
authors.add_edge("Tim Berners-Lee", "Tom Heath", weight=17)
authors.add_edge("Tim Berners-Lee", "Sören Auer", weight=10)
authors.add_edge("Tim Berners-Lee", "Lalana Kagal", weight=9)
authors.add_edge("Tim Berners-Lee", "James A. Hendler", weight=8)

print(authors.nodes(data=True))
print(authors.edges(data=True))```

[('Tim Berners-Lee', {}), ('Christian Bizer', {}), ('Tom Heath', {}), ('Sören Auer', {}), ('Lalana Kagal', {}), ('James A. Hendler', {})]
[('Tim Berners-Lee', 'Christian Bizer', {'weight': 17}), ('Tim Berners-Lee', 'Tom Heath', {'weight': 17}), ('Tim Berners-Lee', 'Sören Auer', {'weight': 10}), ('Tim Berners-Lee', 'Lalana Kagal', {'weight': 9}), ('Tim Berners-Lee', 'James A. Hendler', {'weight': 8})]

[delfimpandiani]

from networkx import MultiGraph

network = MultiGraph()
# no need to add the notes separately, they are created on-the-go as the edges are created themselves

network.add_edge("Tim Berners-Lee", "Christian Bizer", weight=17)
network.add_edge("Tim Berners-Lee", "Tom Heath", weight=17)
network.add_edge("Tim Berners-Lee", "Sören Auer", weight=10)
network.add_edge("Tim Berners-Lee", "Lalana Kagal", weight=9)
network.add_edge("Tim Berners-Lee", "James A. Hendler", weight=8)
network.add_edge("Tim Berners-Lee", "Daniel J. Weitzner", weight=8)

print(network.nodes(data=True))
print(network.edges(data=True))

[('Tim Berners-Lee', {}), ('Christian Bizer', {}), ('Tom Heath', {}), ('Sören Auer', {}), ('Lalana Kagal', {}), ('James A. Hendler', {}), ('Daniel J. Weitzner', {})]
[('Tim Berners-Lee', 'Christian Bizer', {'weight': 17}), ('Tim Berners-Lee', 'Tom Heath', {'weight': 17}), ('Tim Berners-Lee', 'Sören Auer', {'weight': 10}), ('Tim Berners-Lee', 'Lalana Kagal', {'weight': 9}), ('Tim Berners-Lee', 'James A. Hendler', {'weight': 8}), ('Tim Berners-Lee', 'Daniel J. Weitzner', {'weight': 8})]

[mangiafrangette]

from networkx import Graph

tim_graph = Graph()

tim_graph.add_node("Tim Berners-Lee")
tim_graph.add_node("Christian Bizer")
tim_graph.add_node("Tom Heath")
tim_graph.add_node("Sören Auer")
tim_graph.add_node("Lalana Kagal")
tim_graph.add_node("James A. Hendler")

tim_graph.add_edge("Tim Berners-Lee", "Christian Bizer", weight=17)
tim_graph.add_edge("Tim Berners-Lee", "Tom Heath", weight=17)
tim_graph.add_edge("Tim Berners-Lee", "Sören Auer", weight=10)
tim_graph.add_edge("Tim Berners-Lee", "Lalana Kagal", weight=9)
tim_graph.add_edge("Tim Berners-Lee", "James A. Hendler", weight=8)

print(tim_graph.adj["Tim Berners-Lee"])

[bluebell94]

from networkx import MultiGraph

team_coworkers=MultiGraph()
team_coworkers.add_node("Tim Berners-Lee")
team_coworkers.add_node("Christian Brizer")
team_coworkers.add_node("Tom Heath")
team_coworkers.add_node("Sören Auer")
team_coworkers.add_node("Lalann Kagul")
team_coworkers.add_node("James A. Hendler")

team_coworkers.add_edge("Tim Berners-Lee", "Christian Brizer", weight=17)
team_coworkers.add_edge("Tim Berners-Lee","Tom Heath", weight=17)
team_coworkers.add_edge("Tim Berners-Lee", "Sören Auer",weight=10)
team_coworkers.add_edge("Tim Berners-Lee", "Lalann Kagul", weight=9)
team_coworkers.add_edge("Tim Berners-Lee", "James A. Hendler", weight=8)

print(team_coworkers.nodes(data=True))
print(team_coworkers.edges(data=True))

print(team_coworkers.adj)

[('Tim Berners-Lee', {}), ('Christian Brizer', {}), ('Tom Heath', {}), ('Sören Auer', {}), ('Lalann Kagul', {}), ('James A. Hendler', {})]
[('Tim Berners-Lee', 'Christian Brizer', {'weight': 17}), ('Tim Berners-Lee', 'Tom Heath', {'weight': 17}), ('Tim Berners-Lee', 'Sören Auer', {'weight': 10}), ('Tim Berners-Lee', 'Lalann Kagul', {'weight': 9}), ('Tim Berners-Lee', 'James A. Hendler', {'weight': 8})]

{'Tim Berners-Lee': {'Christian Brizer': {0: {'weight': 17}}, 'Tom Heath': {0: {'weight': 17}}, 'Sören Auer': {0: {'weight': 10}}, 'Lalann Kagul': {0: {'weight': 9}}, 'James A. Hendler': {0: {'weight': 8}}}, 'Christian Brizer': {'Tim Berners-Lee': {0: {'weight': 17}}}, 'Tom Heath': {'Tim Berners-Lee': {0: {'weight': 17}}}, 'Sören Auer': {'Tim Berners-Lee': {0: {'weight': 10}}}, 'Lalann Kagul': {'Tim Berners-Lee': {0: {'weight': 9}}}, 'James A. Hendler': {'Tim Berners-Lee': {0: {'weight': 8}}}}

[beccadelbens]

from networkx import Graph

first_graph = Graph()

first_graph.add_node("Tim Berners Lee")
first_graph.add_node("Christian Bizer")
first_graph.add_node("Tom Heath")
first_graph.add_node("Soren Auer")
first_graph.add_node("Lalana Kagal")
first_graph.add_node("James A. Hendler")

first_graph.add_edge("Tim Berners Lee", "Christian Bizer", weight=17)
first_graph.add_edge("Tim Berners Lee", "Tom Heath", weight=17)
first_graph.add_edge("Tim Berners Lee", "Soren Auer", weight=10)
first_graph.add_edge("Tim Berners Lee", "Lalana Kagal", weight=9)
first_graph.add_edge("Tim Berners Lee", "James A. Hendler", weight=8)

print(first_graph.edges(data=True))
#[('Tim Berners Lee', 'Christian Bizer', {'weight': 17}), ('Tim Berners Lee', 'Tom Heath', {'weight': 17}),
#('Tim Berners Lee', 'Soren Auer', {'weight': 10}), ('Tim Berners Lee', 'Lalana Kagal', {'weight': 9}),
#('Tim Berners Lee', 'James A. Hendler', {'weight': 8})]

[dafnikitsiki]

from networkx import MultiGraph

#create a new graph
tim_graph = MultiGraph()

#create five edges
tim_graph.add_edge("Tim Berners Lee", "Tom Heath", weight=17)
tim_graph.add_edge("Tim Berners Lee", "Cristian Bizer", wight=17)
tim_graph.add_edge("Tim Berners Lee", "Soren Auer", weight=10)
tim_graph.add_edge("Tim Berners Lee", "Lalana Kagal", weight=9)
tim_graph.add_edge("Tim Berners Lee", "James A. Hendler", weight=8)

print(tim_graph.edges(data=True))
@essepuntato is it correct not to create the nodes alone before creating the edges?

[essepuntato]

Hi @dafnikitsiki

@essepuntato is it correct not to create the nodes alone before creating the edges?

Yep, this is a totally feasible approach indeed.

[dafnikitsiki]

Thank you very much for the reply!