make sure the Graphviz executables are on your systems‘ PATH

完整报错如下:

Traceback (most recent call last):
File "/home/appleyuchi/anaconda3/envs/Python3.6/lib/python3.6/site-packages/graphviz/backend.py", line 164, in run
proc = subprocess.Popen(cmd, startupinfo=get_startupinfo(), **kwargs)
File "/home/appleyuchi/anaconda3/envs/Python3.6/lib/python3.6/subprocess.py", line 729, in __init__
restore_signals, start_new_session)
File "/home/appleyuchi/anaconda3/envs/Python3.6/lib/python3.6/subprocess.py", line 1364, in _execute_child
raise child_exception_type(errno_num, err_msg, err_filename)
FileNotFoundError: [Errno 2] No such file or directory: 'dot': 'dot'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "DependencyParser.py", line 60, in <module>
g.view()
File "/home/appleyuchi/anaconda3/envs/Python3.6/lib/python3.6/site-packages/graphviz/files.py", line 242, in view
quiet=quiet, quiet_view=quiet_view)
File "/home/appleyuchi/anaconda3/envs/Python3.6/lib/python3.6/site-packages/graphviz/files.py", line 209, in render
quiet=quiet)
File "/home/appleyuchi/anaconda3/envs/Python3.6/lib/python3.6/site-packages/graphviz/backend.py", line 221, in render
run(cmd, capture_output=True, cwd=cwd, check=True, quiet=quiet)
File "/home/appleyuchi/anaconda3/envs/Python3.6/lib/python3.6/site-packages/graphviz/backend.py", line 167, in run
raise ExecutableNotFound(cmd)
graphviz.backend.ExecutableNotFound: failed to execute ['dot', '-Tpdf', '-O', '测试图片.dot.gv'], make sure the Graphviz executables are on your systems' PATH

原因:

没有安装graphviz

解决方案：

apt install graphviz

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