Python安装包不会导入模块

Question

我想创建一个可以从 CLI 执行的名为 knife 的 python 应用，问题是它无法导入模块。

我的文件结构是这样的：

my_project/
    knife/
        __init__.py
        knife.py
        external.py
    setup.py

我的 setup.py 看起来像这样：

#!/usr/bin/python

from setuptools import setup, find_packages

setup(name='Knife',
      version='0.3',
      description='Very cool project',
      author='John Doe',
      author_email='author@email.com',
      packages=find_packages(),
      py_modules=['knife.external'],
      scripts=['knife/knife.py'],
     )

我的knife.py 看起来像这样：

#!/usr/bin/python

import external

def main():
    print("Execute main function")

if __name__ == "__main__":
    main()

所以在使用 setup.py install 安装模块后，我尝试运行刀但一直抛出此错误：

$ knife.py 
Traceback (most recent call last):
  File "/usr/bin/knife.py", line 4, in <module>
    __import__('pkg_resources').run_script('Knife==0.3', 'knife.py')
  File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 723, in run_script
    self.require(requires)[0].run_script(script_name, ns)
  File "/usr/lib/python2.7/site-packages/pkg_resources/__init__.py", line 1643, in run_script
    exec(script_code, namespace, namespace)
  File "/usr/lib/python2.7/site-packages/Knife-0.3-py2.7.egg/EGG-INFO/scripts/knife.py", line 3, in <module>
    __requires__ = 'Knife==0.3'
ImportError: No module named external

到底发生了什么？我该如何解决？

Answer 1

external.py 也应该发货。于是 setup.py 添加了 external.py：

  scripts=['knife/knife.py', 'knife/external.py'],