用64位windows10的CMD命令安装pip install scrapy出错：
Running setup.py bdist_wheel for Twisted ... error
Failed building wheel for Twisted
Running setup.py clean for Twisted
Failed to build Twisted
Installing collected packages: pycparser, cffi, asn1crypto, cryptography, pyOpenSSL, Twisted, pyasn1, pyasn1-modules, service-identity, queuelib, scrapy
Running setup.py install for Twisted ... error
Exception:
Traceback (most recent call last):
File "e:\python\envs\py2scripy\lib\site-packages\pip\compat\__init__.py", line 73, in console_to_str
return s.decode(sys.__stdout__.encoding)
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 30: invalid start byte
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "e:\python\envs\py2scripy\lib\site-packages\pip\basecommand.py", line 215, in main
status = self.run(options, args)
File "e:\python\envs\py2scripy\lib\site-packages\pip\commands\install.py", line 342, in run
prefix=options.prefix_path,
File "e:\python\envs\py2scripy\lib\site-packages\pip\req\req_set.py", line 784, in install
**kwargs
File "e:\python\envs\py2scripy\lib\site-packages\pip\req\req_install.py", line 878, in install
spinner=spinner,
File "e:\python\envs\py2scripy\lib\site-packages\pip\utils\__init__.py", line 676, in call_subprocess
line = console_to_str(proc.stdout.readline())
File "e:\python\envs\py2scripy\lib\site-packages\pip\compat\__init__.py", line 75, in console_to_str
return s.decode('utf_8')
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 30: invalid start byte
解决方法：
参考连接方法：
https://stackoverflow.com/questions/45830222/a-error-happened-while-pip-was-installing-scrapy