为什么 PyCharm 在使用 Python 虚拟环境时在 Mac 上删除 /usr/local/bin

Question

在 Mac OS X El Capitan 10.11.1 上运行 在 PyCharm 5 中（这在 PyCharm 4.5 中运行良好）

import os
print("PATH:", os.environ.get("PATH"))

如果我在 PyCharm 的项目解释器设置为 System's Python:/Library/Frameworks/Python.framework/Versions/3.4/bin/python3 的情况下运行这个程序，我得到的输出如下：

PATH: /Users/agautam/bin:/Library/Frameworks/Python.framework/Versions/3.4/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin

如果我在项目解释器设置为虚拟环境/Users/agautam/work/my-awesome-py-project/venv/bin/python3 的情况下运行相同的程序，我会得到：

PATH: /usr/bin:/bin:/usr/sbin:/sbin:/Users/agautam/work/my-awesome-py-project/venv/bin

问题：是当我使用虚拟环境时，/usr/local/bin 丢失了。

以下是虚拟环境的创建方式：

import sys, platform, subprocess
from os.path import dirname, join

root_path = join(dirname(__file__), '../..')
venv_path = join(root_path, 'venv')


def build_virtual_environment():
    print("Building virtual env from Python version", sys.version)

    # Create a fresh virtual env
    import venv
    builder = venv.EnvBuilder(with_pip=True)
    builder.create(venv_path)

    # Install dependencies in new virtual env
    run_in_venv('python', ['-m', 'pip', 'install', '--upgrade', 'pip'])  # Upgrade pip itself
    run_in_venv('pip', ['install', '-r', join(root_path, 'requirements.txt')])


def run_in_venv(cmd, args):
    if platform.system() == 'Windows':
        cmd += '.exe'
        virtual_env_bin_path = r'venv/Scripts'
    else:
        virtual_env_bin_path = r'venv/bin'

    subprocess.check_call([join(root_path, virtual_env_bin_path, cmd)] + args)


if __name__ == '__main__':
    build_virtual_environment()

附加信息：从命令行运行 python 解释器产生完全相同的结果（所以它似乎是一个 pycharm 问题）：

$ /Library/Frameworks/Python.framework/Versions/3.4/bin/python3
Python 3.4.0 (v3.4.0:04f714765c13, Mar 15 2014, 23:02:41) 
[GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import os
>>> os.environ.get("PATH")
'/Users/agautam/bin:/Library/Frameworks/Python.framework/Versions/3.4/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin'
>>> 

$ ./venv/bin/python3
Python 3.4.0 (v3.4.0:04f714765c13, Mar 15 2014, 23:02:41) 
[GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import os
>>> os.environ.get("PATH")
'/Users/agautam/bin:/Library/Frameworks/Python.framework/Versions/3.4/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin'
>>> 

任何帮助/信息/指针将不胜感激。

Answer 1

这是作为错误报告给 JetBrains，PY-17816。现在已根据release notes 修复了 2017.1.2 版本（版本 171.4249.47）。