In [8]:

    

#imports
import networkx as nx
G=nx.Graph()


    

In [9]:

    

#adding nodes
#one by one
G.add_node(1)

#a list of nodes
G.add_nodes_from([2,3])

#adding nbunch: check documentation
H=nx.path_graph(10)
G.add_nodes_from(H)


    

In [10]:

    

#growing edges
#directly
G.add_edge(1,2)

#by definition
e=(2,3)
G.add_edge(*e)

#list of edges
G.add_edges_from([(1,2),(1,3)])

#growing ebunch: check documentation
G.add_edges_from(H.edges())


    

In [12]:

    

#remove everything
G.clear()


    

In [13]:

    

#interesting additions
G.add_edges_from([(1,2),(1,3)])

G.add_node(1)

G.add_edge(1,2)

G.add_node("spam")

G.add_nodes_from("spam")


    

In [15]:

    

#counting nodes
G.number_of_nodes()


    

    
Out[15]:





8

In [16]:

    

#counting edges
G.number_of_edges()


    

    
Out[16]:





2

In [17]:

    

#examining nodes
G.nodes()


    

    
Out[17]:





[1, 2, 3, 'spam', 's', 'p', 'a', 'm']

In [18]:

    

#examining edges
G.edges()


    

    
Out[18]:





[(1, 2), (1, 3)]

In [19]:

    

#examining neighbors
G.neighbors(1)


    

    
Out[19]:





[2, 3]

In [20]:

    

#accessing edges
G.add_edge(1,3)

G[1][3]['color']='blue'


    

In [22]:

    

#iterating over edges
FG=nx.Graph()
FG.add_weighted_edges_from([(1,2,0.125),(1,3,0.75),(2,4,1.2),(3,4,0.375)])
for n,nbrs in FG.adjacency_iter():
    for nbr,eattr in nbrs.items():
        data=eattr['weight']
        if data<0.5: print('(%d, %d, %.3f)' % (n,nbr,data))


    

    




(1, 2, 0.125)
(2, 1, 0.125)
(3, 4, 0.375)
(4, 3, 0.375)

In [23]:

    

#adding attributes
G = nx.Graph(day="Friday")
G.graph


    

    
Out[23]:





{'day': 'Friday'}

In [24]:

    

#editing graph level attributes
G.graph['day']='Monday'
G.graph


    

    
Out[24]:





{'day': 'Monday'}

In [25]:

    

#adding node attributes
G.add_node(1, time='5pm')
G.add_nodes_from([3], time='2pm')
G.node[1]


    

    
Out[25]:





{'time': '5pm'}

In [26]:

    

G.node[1]['room'] = 714
G.nodes(data=True)


    

    
Out[26]:





[(1, {'room': 714, 'time': '5pm'}), (3, {'time': '2pm'})]

In [ ]: