<｜begin▁of▁sentence｜>### Instruction:
Given a NetworkX graph with several nodes, each node has a 'time' attribute with different values. How can we determine the number of nodes that have the 'time' attribute?
### Response:
import networkx as nx

# Create a NetworkX graph
g = nx.Graph()

# Adding node attributes
g.add_node(1, time='5pm')
g.add_node(2, time='6pm')
g.add_node(3, time='7pm')

# Create an AttributeCollector instance
attribute_collector = nx.get_node_attributes(g, 'time')

# Use the __len__ method to get the number of elements
count_attributes = len(attribute_collector)

# Print the number of elements
print(f'Number of collected attributes: {count_attributes}')
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