Python3.3无法运行此代码，因为它没有pygraph是他们安装pygraph的一种简单方式，或者我可以以某种方式添加代码

Question

Python3.3无法运行这段代码，因为它没有pygraoh是它们安装pygraoh的一种简单方式，或者我可以以某种方式添加代码。如你所见，我认为其余的都没问题。这只是一个相当重要的问题。

# Import graphviz
import sys

# Import pygraph
from pygraph.classes.graph import graph
from pygraph.classes.digraph import digraph
from pygraph.algorithms.searching import breadth_first_search
from pygraph.readwrite.dot import write

# Graph creation
gr = graph()

# Add nodes and edges
gr.add_nodes(["Portugal","Spain","France","Germany","Belgium","Netherlands","Italy"])
gr.add_nodes(["Switzerland","Austria","Denmark","Poland","Czech Republic","Slovakia","Hungary"])
gr.add_nodes(["England","Ireland","Scotland","Wales"])

gr.add_edge(("Portugal", "Spain"))
gr.add_edge(("Spain","France"))
gr.add_edge(("France","Belgium"))
gr.add_edge(("France","Germany"))
gr.add_edge(("France","Italy"))
gr.add_edge(("Belgium","Netherlands"))
gr.add_edge(("Germany","Belgium"))
gr.add_edge(("Germany","Netherlands"))
gr.add_edge(("England","Wales"))
gr.add_edge(("England","Scotland"))
gr.add_edge(("Scotland","Wales"))
gr.add_edge(("Switzerland","Austria"))
gr.add_edge(("Switzerland","Germany"))
gr.add_edge(("Switzerland","France"))
gr.add_edge(("Switzerland","Italy"))
gr.add_edge(("Austria","Germany"))
gr.add_edge(("Austria","Italy"))
gr.add_edge(("Austria","Czech Republic"))
gr.add_edge(("Austria","Slovakia"))
gr.add_edge(("Austria","Hungary"))
gr.add_edge(("Denmark","Germany"))
gr.add_edge(("Poland","Czech Republic"))
gr.add_edge(("Poland","Slovakia"))
gr.add_edge(("Poland","Germany"))
gr.add_edge(("Czech Republic","Slovakia"))
gr.add_edge(("Czech Republic","Germany"))
gr.add_edge(("Slovakia","Hungary"))

# Draw as PNG
dot = write(gr)
f = open('europe.dot', 'a')
f.write(dot)
f.close()
import os
command = '"C:\\Program Files\\Graphviz 2.28\\bin\\dot.exe" -Tpng europe.dot > europe.png'
print(command)
os.system(command)
os.system('europe.png')

Answer 1

您应该能够使用pip install python-graph-core或easy_install python-graph-core --如果这不起作用，那么您需要从这里下载它，解压缩/压缩它，并在结果目录中运行：

python setup.py install

或

python3 setup.py install

对于-core和-dot包，您都需要这样做。

如果您是这样做的，您将需要确保安装过程中满足了依赖关系(pydot和pyparsing)。