升级到pip 10.0.1后，我无法在Visual Studio 2017中安装任何新软件包。
----- Installing 'beautifulsoup4==4.6.0' -----
Traceback (most recent call last):
File "<string>", line 1, in <module>
AttributeError: 'module' object has no attribute 'main'
----- Failed to install 'beautifulsoup4==4.6.0' -----
或者
----- Installing 'matplotlib==2.2.2' -----
Traceback (most recent call last):
File "<string>", line 1, in <module>
AttributeError: 'module' object has no attribute 'main'
----- Failed to install 'matplotlib==2.2.2' -----
或者
----- Installing 'requests-auth==1.0.2' -----
Traceback (most recent call last):
File "<string>", line 1, in <module>
AttributeError: 'module' object has no attribute 'main'
----- Failed to install 'requests-auth==1.0.2' -----