这个问题是编码的问题在开头导入个包就行了，简答粗暴

import encodings.idna

补充：执行Python出现LookupError: unknown encoding: cp65001解决办法

在执行fetch v8时出现

E:\GitProject\svn_v8>fetch v8
Running: 'E:\GitProject\libcef\depot_tools\python276_bin\python.exe' 'E:\GitProj
ect\libcef\depot_tools\gclient.py' root
Traceback (most recent call last):
File "E:\GitProject\libcef\depot_tools\\fetch.py", line 353, in module>
sys.exit(main())
File "E:\GitProject\libcef\depot_tools\\fetch.py", line 348, in main
return run(options, spec, root)
File "E:\GitProject\libcef\depot_tools\\fetch.py", line 342, in run
return checkout.init()
File "E:\GitProject\libcef\depot_tools\\fetch.py", line 134, in init
self.run_gclient('config', '--spec', self._format_spec())
File "E:\GitProject\libcef\depot_tools\\fetch.py", line 76, in run_gclient
return self.run(cmd_prefix + cmd, **kwargs)
File "E:\GitProject\libcef\depot_tools\\fetch.py", line 63, in run
print 'Running: %s' % (' '.join(pipes.quote(x) for x in cmd))
LookupError: unknown encoding: cp65001

LookupError: unknown encoding: cp65001

出现此错误后改变编码方式即可解决：

chcp 1252

也可以通过修改注册表CodePage值来设置默认字符编码

HKEY_CURRENT_USER\Console\%SystemRoot%_system32_cmd.exe\CodePage

以上为个人经验，希望能给大家一个参考，也希望大家多多支持脚本之家。如有错误或未考虑完全的地方，望不吝赐教。