ImportError：无法导入名称md5

Question

真的不知道这是怎么回事，我需要在弹性beantalk上部署我的flask应用程序，但是以某种方式改变了路径，无法再运行python application.py了

[dotnet --info]
.NET Core SDK (reflecting any global.json):
 Version:   2.1.701
 Commit:    8cf7278aa1

Runtime Environment:
 OS Name:     Mac OS X
 OS Version:  10.14
 OS Platform: Darwin
 RID:         osx.10.14-x64
 Base Path:   /usr/local/share/dotnet/sdk/2.1.701/

Host (useful for support):
  Version: 2.1.12
  Commit:  ccea2e606d

[brew -v]
Homebrew 2.2.0
Homebrew/homebrew-core (git revision 43ad0; last commit 2019-11-30)

我也已经完成了这些步骤：

LDFLAGS:  -L/usr/local/opt/openssl/lib
CPPFLAGS: -I/usr/local/opt/openssl/include

仍然出现此错误：

File "/Users/ipchelsea/Library/Python/2.7/lib/python/site-packages/urllib3/util/ssl_.py", line 8, in <module>
    from hashlib import md5, sha1, sha256
ImportError: cannot import name md5

[当我执行[brew link --force openssl]时，我得到以下信息：

Warning: Refusing to link macOS-provided software: [email protected]

ERROR:root:code for hash md5 was not found.
Traceback (most recent call last):
  File "/usr/local/Cellar/python@2/2.7.16/Frameworks/Python.framework/Versions/2.7/lib/python2.7/hashlib.py", line 147, in <module>
    globals()[__func_name] = __get_hash(__func_name)
  File "/usr/local/Cellar/python@2/2.7.16/Frameworks/Python.framework/Versions/2.7/lib/python2.7/hashlib.py", line 97, in __get_builtin_constructor
    raise ValueError('unsupported hash type ' + name)
ValueError: unsupported hash type md5
ERROR:root:code for hash sha1 was not found.
Traceback (most recent call last):
  File "/usr/local/Cellar/python@2/2.7.16/Frameworks/Python.framework/Versions/2.7/lib/python2.7/hashlib.py", line 147, in <module>
    globals()[__func_name] = __get_hash(__func_name)
  File "/usr/local/Cellar/python@2/2.7.16/Frameworks/Python.framework/Versions/2.7/lib/python2.7/hashlib.py", line 97, in __get_builtin_constructor
    raise ValueError('unsupported hash type ' + name)
ValueError: unsupported hash type sha1
ERROR:root:code for hash sha224 was not found.
Traceback (most recent call last):
  File "/usr/local/Cellar/python@2/2.7.16/Frameworks/Python.framework/Versions/2.7/lib/python2.7/hashlib.py", line 147, in <module>
    globals()[__func_name] = __get_hash(__func_name)
  File "/usr/local/Cellar/python@2/2.7.16/Frameworks/Python.framework/Versions/2.7/lib/python2.7/hashlib.py", line 97, in __get_builtin_constructor
    raise ValueError('unsupported hash type ' + name)
ValueError: unsupported hash type sha224
ERROR:root:code for hash sha256 was not found.
Traceback (most recent call last):
  File "/usr/local/Cellar/python@2/2.7.16/Frameworks/Python.framework/Versions/2.7/lib/python2.7/hashlib.py", line 147, in <module>
    globals()[__func_name] = __get_hash(__func_name)
  File "/usr/local/Cellar/python@2/2.7.16/Frameworks/Python.framework/Versions/2.7/lib/python2.7/hashlib.py", line 97, in __get_builtin_constructor
    raise ValueError('unsupported hash type ' + name)
ValueError: unsupported hash type sha256
ERROR:root:code for hash sha384 was not found.
Traceback (most recent call last):
  File "/usr/local/Cellar/python@2/2.7.16/Frameworks/Python.framework/Versions/2.7/lib/python2.7/hashlib.py", line 147, in <module>
    globals()[__func_name] = __get_hash(__func_name)
  File "/usr/local/Cellar/python@2/2.7.16/Frameworks/Python.framework/Versions/2.7/lib/python2.7/hashlib.py", line 97, in __get_builtin_constructor
    raise ValueError('unsupported hash type ' + name)
ValueError: unsupported hash type sha384
ERROR:root:code for hash sha512 was not found.
Traceback (most recent call last):
  File "/usr/local/Cellar/python@2/2.7.16/Frameworks/Python.framework/Versions/2.7/lib/python2.7/hashlib.py", line 147, in <module>
    globals()[__func_name] = __get_hash(__func_name)
  File "/usr/local/Cellar/python@2/2.7.16/Frameworks/Python.framework/Versions/2.7/lib/python2.7/hashlib.py", line 97, in __get_builtin_constructor
    raise ValueError('unsupported hash type ' + name)
ValueError: unsupported hash type sha512
Traceback (most recent call last):
  File "application.py", line 4, in <module>
    import urllib3
  File "/Users/ipchelsea/Library/Python/2.7/lib/python/site-packages/urllib3/__init__.py", line 8, in <module>
    from .connectionpool import (
  File "/Users/ipchelsea/Library/Python/2.7/lib/python/site-packages/urllib3/connectionpool.py", line 29, in <module>
    from .connection import (
  File "/Users/ipchelsea/Library/Python/2.7/lib/python/site-packages/urllib3/connection.py", line 38, in <module>
    from .util.ssl_ import (
  File "/Users/ipchelsea/Library/Python/2.7/lib/python/site-packages/urllib3/util/__init__.py", line 6, in <module>
    from .ssl_ import (
  File "/Users/ipchelsea/Library/Python/2.7/lib/python/site-packages/urllib3/util/ssl_.py", line 8, in <module>
    from hashlib import md5, sha1, sha256
ImportError: cannot import name md5

Answer 1

我正在使用macOS，请通过brew unlink openssl && brew reinstall python@2修复此问题>

Answer 2

我个人使用，建议使用pyenv来管理Python版本。最初，我不确定如何解决此问题，并尝试按照建议的brew使用here重新安装。但是，然后我回想起我曾经使用pyenv进行安装，因此能够使用以下命令修复错误。