使用pip安装flask-bcrypt时，一个错误是：UnicodeDecodeError：'ascii'编解码器无法解码位置49的字节0xe6：序数不在范围内（128）

Question

今天，当我安装flask-bcrypt时使用：

pip install flask-bcrypt

发生此错误：

Command /home/sf/python/venv/bin/python2 -c "import setuptools, 
tokenize;__file__='/tmp/pip-build-duYRO6/bcrypt/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-hlvpv8-record/install-record.txt --single-version-externally-managed --compile --install-headers /home/sf/python/venv/include/site/python2.7 failed with error code 1 in /tmp/pip-build-duYRO6/bcrypt
Traceback (most recent call last):
  File "/home/sf/python/venv/bin/pip", line 11, in <module>
    sys.exit(main())
  File "/home/sf/python/venv/local/lib/python2.7/site-packages/pip/__init__.py", line 248, in main
    return command.main(cmd_args)
  File "/home/sf/python/venv/local/lib/python2.7/site-packages/pip/basecommand.py", line 161, in main
    text = '\n'.join(complete_log)
UnicodeDecodeError: 'ascii' codec can't decode byte 0xe6 in position 49: ordinal not in range(128)

Answer 1

您可以尝试关注

export LANG=en_US.UTF-8
pip install flask-bcrypt

Answer 2

当您在命令下键入python shell时，

>>> import sys
>>> sys.getdefaultencoding()

它将输出以下内容：

'ascii'

所以，我修改

/etc/python2.7/sitecustomize.py

添加：

import sys
sys.setdefaultencoding('utf-8')

现在，defaultencoding更改为：

'utf-8'

此错误已解决，但还有另一个错误：

Command /home/sf/python/venv/bin/python2 -c "import setuptools,  
tokenize;__file__='/tmp/pip-build-6LgjpC/bcrypt/setup.py';
exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', 
'\n'), __file__, 'exec'))" install --record /tmp/pip-3qxBJi-record/install-
record.txt --single-version-externally-managed --compile --install-headers 
/home/sf/python/venv/include/site/python2.7 failed with error code 1 in 
/tmp/pip-build-6LgjpC/bcrypt
Storing debug log for failure in /home/sf/.pip/pip.log

您可以看到以下内容： 当我尝试安装Flask-bcrypt时，它抛出错误：命令'x86_64-linux-gnu-gcc'失败，退出状态为1

我只是安装：

apt-get install libffi-dev

最后，我成功安装了flask-bcrypt。