python - 如何解决 PyCallGraphException : The command "dot -Tpng -failed with error code 256 error?

Question

尝试运行以下命令以使用 pycallgraph 制作调用图 -

pycallgraph graphviz --output-file=/var/www/html/Reports/winmain.png -- token_check.py

但是当我运行命令时出现以下错误。

pycallgraph.exceptions.PyCallGraphException: The command "dot -Tpng -o/var/www/html/Reports/winmain.png /tmp/tmpVDYnvE" failed with error code 256.

请注意，我同时拥有 'dot' 和 graphviz。
谁能告诉我如何解决这个问题？

这是完整的追溯-

Traceback (most recent call last):
File "/usr/bin/pycallgraph", line 26, in <module>
exec(__file_content)
File "/usr/lib/python2.7/site-packages/pycallgraph/pycallgraph.py", line   38, in __exit__
self.done()
File "/usr/lib/python2.7/site-packages/pycallgraph/pycallgraph.py", line 81, in done
self.stop()
File "/usr/lib/python2.7/site-packages/pycallgraph/pycallgraph.py", line 90, in generate
output.done()
File "/usr/lib/python2.7/site-packages/pycallgraph/output/graphviz.py", line 112, in done
'code %(ret)i.' % locals())
 pycallgraph.exceptions.PyCallGraphException: The command "dot -Tpng -o/var/www/html/Reports/winmain.png /tmp/tmpVDYnvE" failed with error code 256.

Answer 1

这对我有用
转至 /usr/lib/python2.7/site-packages/pycallgraph/output/graphviz.py在 -o 之间添加一个空格和论点。那是 ，
在第 102 行附近更改

cmd = '{} -T{} -o{} {}'.format(
            self.tool, self.output_type, self.output_file, temp_name
        )

到

cmd = '{} -T{} -o {} {}'.format(
            self.tool, self.output_type, self.output_file, temp_name
        )