如何使用Python制作流程图

pip install graphviz

graphviz.backend.execute.CalledProcessError: Command '[WindowsPath('dot'), '-Kdot', '-Tpng', '-O', 'flowchart']' returned non-zero exit status 3221225477. [stderr: b'Warning: Could not load "C:\\ProgramData\\anaconda3\\envs\\py310\\Library\\bin\\gvplugin_pango.dll" - It was found, so perhaps one of its dependents was not.  Try ldd.\r\nWarning: Could not load "C:\\ProgramData\\anaconda3\\envs\\py310\\Library\\bin\\gvplugin_pango.dll" - It was found, so perhaps one of its dependents was not.  Try ldd.\r\nWarning: Could not load "C:\\ProgramData\\anaconda3\\envs\\py310\\Library\\bin\\gvplugin_pango.dll" - It was found, so perhaps one of its dependents was not.  Try ldd.\r\nWarning: Warning: no value for width of non-ASCII character 229. Falling back to width of space character\r\n']

pip uninstall graphviz -yconda remove graphviz -y

conda install -c conda-forge graphviz python-graphviz -y

dot -V

dot - graphviz version 9.x.x

import os# 一定要在 import graphviz 之前os.environ['GDFONTPATH'] = r'C:\Windows\Fonts'os.environ['GV_PLUGIN_PATH'] = ''  # 禁用 pango（关键）from graphviz import Digraph# 这一行是“生死线”，不设置编码方式看到的是一堆 5F 59 00 CB 中文乱码dot = Digraph(      format='png',       encoding='utf-8' )dot.graph_attr.update(      charset='UTF-8',       fontname='SimHei')dot.node_attr.update(      fontname='SimHei')dot.edge_attr.update(      fontname='SimHei')# 添加节点dot.node('A', '开始')dot.node('B', '读取数据')dot.node('C', '是否有效？')dot.node('D', '处理数据')dot.node('E', '结束')# 添加边dot.edge('A', 'B')dot.edge('B', 'C')dot.edge('C', 'D', label='是')dot.edge('C', 'E', label='否')dot.edge('D', 'E')# 流程图渲染 dot.render('flowchart_cn')