Travis pylint 构建失败，出现关于 singledispatch 的错误

Question

我的 Travis 构建当前在 pylint 上失败并出现错误：

Traceback (most recent call last):
  File "/home/travis/virtualenv/python3.3.6/bin/pylint", line 11, in <module>
    sys.exit(run_pylint())
  File "/home/travis/virtualenv/python3.3.6/lib/python3.3/site-packages/pylint/__init__.py", line 17, in run_pylint
    from pylint.lint import Run
  File "/home/travis/virtualenv/python3.3.6/lib/python3.3/site-packages/pylint/lint.py", line 75, in <module>
    import astroid
  File "/home/travis/virtualenv/python3.3.6/lib/python3.3/site-packages/astroid/__init__.py", line 62, in <module>
    from astroid.nodes import *
  File "/home/travis/virtualenv/python3.3.6/lib/python3.3/site-packages/astroid/nodes.py", line 23, in <module>
    from astroid.node_classes import (
  File "/home/travis/virtualenv/python3.3.6/lib/python3.3/site-packages/astroid/node_classes.py", line 34, in <module>
    from functools import singledispatch as _singledispatch
ImportError: cannot import name singledispatch

我目前使用的pylint构建命令是：

find -name "*.py" -not -path "*/migrations/*" -not -name "apps.py" -not -name "wsgi.py" -not -name "manage.py" | xargs pylint --load-plugins pylint_django

在我的本地 windows 机器上运行（在 bash shell 中）。我的构建脚本的其余部分是：

language: python

python:
        - "3.3"
        - "3.4"
        - "3.5"
        - "3.5-dev"
        - "3.6"
        - "3.6-dev"
        - "3.7-dev"

install:
        - pip install flake8
        - pip install flake8-docstrings
        - pip install pylint
        - pip install pylint-django
        - pip install -r requirements.txt
        - npm install -g stylelint
        - npm install stylelint-config-standard --save-dev
        - npm install -g eslint
        - npm install -g eslint-config-standard eslint-plugin-standard eslint-plugin-promise eslint-plugin-import eslint-plugin-node

script:
        - flake8 . --exclude migrations,tests.py,__init__.py,apps.py,manage.py
        - find -name "*.py" -not -path "*/migrations/*" -not -name "apps.py" -not -name "wsgi.py" -not -name "manage.py" | xargs pylint --load-plugins pylint_django
    - stylelint **/static/**/*.css
    - eslint . --ignore-pattern '/staticfiles/*'

我该如何解决这个错误？提前致谢。

Answer 1

原来这个问题是由于 flake8 干扰 pylint 而引起的。在构建脚本中交换它们的顺序解决了问题

Travis pylint 构建失败，出现关于 singledispatch 的错误

Travis pylint build failing with error regarding singledispatch

python

django

travis-ci

pylint

single-dispatch