ImportError: cannot import name md5

问题

Don't really know what's going on here, I need to deploy my flask app on elastic beanstalk but somehow changed the path and can't run python application.py anymore

[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)

I've already done these steps too :

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

Still got this error:

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

When I do [brew link --force openssl], I get below:

Warning: Refusing to link macOS-provided software: openssl@1.1

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

回答1:

I'm using macOS, fix this by brew unlink openssl && brew reinstall python@2

From comment, python@2 is no longer available. This may work brew unlink openssl && brew install https://raw.githubusercontent.com/Homebrew/homebrew-core/86a44a0a552c673a05f11018459c9f5faae3becc/Formula/python@2.rb

回答2:

I personally use and would recommend pyenv to manage Python versions. At first I was not sure how to fix this, and tried to re-install using brew as suggested here. However, I then recalled that I had used pyenv to install and so I was able to fix my error with.

pyenv install -f 2.7.15

The -f option forces the installation of that version even if it already exists on your system. You would need to use 2.7.16 or whatever version you would like it to use.

The python-build that pyenv uses will use the openssl library from brew if it's available.