python broken after `brew install awscurl`

[cyrfer]

Title says it all.

I think awscurl required a different version of python than I had on my system.

After running brew install awscurl, I saw:

==> Installing dependencies for awscurl: openssl@1.1, readline, xz and python@3.8

...

Python has been installed as
  /usr/local/opt/python@3.8/bin/python3

You can install Python packages with
  /usr/local/opt/python@3.8/bin/pip3 install <package>
They will install into the site-package directory
  /usr/local/opt/python@3.8/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages

See: https://docs.brew.sh/Homebrew-and-Python

python@3.8 is keg-only, which means it was not symlinked into /usr/local,
because this is an alternate version of another formula.

If you need to have python@3.8 first in your PATH run:
  echo 'export PATH="/usr/local/opt/python@3.8/bin:$PATH"' >> ~/.bash_profile

For compilers to find python@3.8 you may need to set:
  export LDFLAGS="-L/usr/local/opt/python@3.8/lib"

For pkg-config to find python@3.8 you may need to set:
  export PKG_CONFIG_PATH="/usr/local/opt/python@3.8/lib/pkgconfig"

Now when I run simple tests with the AWS CLI, I see:

$ aws iam get-user
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 "/usr/local/bin/aws", line 19, in <module>
    import awscli.clidriver
  File "/usr/local/lib/python2.7/site-packages/awscli/clidriver.py", line 17, in <module>
    import botocore.session
  File "/usr/local/lib/python2.7/site-packages/botocore/session.py", line 28, in <module>
    import botocore.configloader
  File "/usr/local/lib/python2.7/site-packages/botocore/configloader.py", line 19, in <module>
    from botocore.compat import six
  File "/usr/local/lib/python2.7/site-packages/botocore/compat.py", line 27, in <module>
    from urllib3 import exceptions
  File "/usr/local/lib/python2.7/site-packages/urllib3/__init__.py", line 7, in <module>
    from .connectionpool import (
  File "/usr/local/lib/python2.7/site-packages/urllib3/connectionpool.py", line 30, in <module>
    from .connection import (
  File "/usr/local/lib/python2.7/site-packages/urllib3/connection.py", line 39, in <module>
    from .util.ssl_ import (
  File "/usr/local/lib/python2.7/site-packages/urllib3/util/__init__.py", line 6, in <module>
    from .ssl_ import (
  File "/usr/local/lib/python2.7/site-packages/urllib3/util/ssl_.py", line 8, in <module>
    from hashlib import md5, sha1, sha256
ImportError: cannot import name md5

UPDATE: apparently its not just the aws CLI. It's other things...

$ which pip
/usr/local/bin/pip

$ pip -v
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 "/usr/local/bin/pip", line 11, in <module>
    load_entry_point('pip==19.0.3', 'console_scripts', 'pip')()
  File "/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 489, in load_entry_point
    return get_distribution(dist).load_entry_point(group, name)
  File "/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2793, in load_entry_point
    return ep.load()
  File "/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2411, in load
    return self.resolve()
  File "/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 2417, in resolve
    module = __import__(self.module_name, fromlist=['__name__'], level=0)
  File "/usr/local/lib/python2.7/site-packages/pip/_internal/__init__.py", line 19, in <module>
    from pip._vendor.urllib3.exceptions import DependencyWarning
  File "/usr/local/lib/python2.7/site-packages/pip/_vendor/urllib3/__init__.py", line 8, in <module>
    from .connectionpool import (
  File "/usr/local/lib/python2.7/site-packages/pip/_vendor/urllib3/connectionpool.py", line 29, in <module>
    from .connection import (
  File "/usr/local/lib/python2.7/site-packages/pip/_vendor/urllib3/connection.py", line 38, in <module>
    from .util.ssl_ import (
  File "/usr/local/lib/python2.7/site-packages/pip/_vendor/urllib3/util/__init__.py", line 6, in <module>
    from .ssl_ import (
  File "/usr/local/lib/python2.7/site-packages/pip/_vendor/urllib3/util/ssl_.py", line 8, in <module>
    from hashlib import md5, sha1, sha256
ImportError: cannot import name md5

[okigan]

that's odd -- the benefit of brew is that it shall not affect your system, so AFAIK you could install awscurl and and even if they use different version of python it would work (and not change you system's python)

[cyrfer]

It definitely did affect my system. Perhaps you can relax the requirements to use whatever the system has?

[okigan]

it's needs to have a dependency on python or for systems that do not have it nothing would be installed (making that "dynamic" is more than I can master in brew formula creation magic and I think would create more support issues).

that being said here capture from "my system", different system python and running awscurl

which python && python --version

/usr/bin/python Python 2.7.16

which python3 && python3 --version

/usr/local/bin/python3 Python 3.7.7

which awscurl && awscurl

/usr/local/bin/awscurl usage: awscurl [-h] [-v] [-i] [-X REQUEST] [-d DATA] [-H HEADER] [-k] [--data-binary] [--region REGION] [--profile PROFILE] [--service SERVICE] [--access_key ACCESS_KEY] [--secret_key SECRET_KEY] [--security_token SECURITY_TOKEN] [--session_token SESSION_TOKEN] uri awscurl: error: the following arguments are required: uri

wild guess maybe openssl is hardlinked on your system (guessing based on): https://stackoverflow.com/questions/59269208/errorrootcode-for-hash-md5-was-not-found-when-using-any-hg-mercurial-command

[cyrfer]

Ok this might be a false alarm. After restarting my mac laptop, I was able to resume using the aws CLI.

Also, it seems pip is the only thing I've noticed that is broken at the moment.

pip3 works.

$ which pip
/usr/local/bin/pip

$ which pip3 && pip3 --version
/usr/local/opt/python@3.8/bin/pip3
pip 20.0.2 from /usr/local/lib/python3.8/site-packages/pip (python 3.8)

$ which python && python --version
/usr/local/bin/python
Python 2.7.16

$ which python3 && python3 --version
/usr/local/opt/python@3.8/bin/python3
Python 3.8.2

$ which awscurl && awscurl -v
/usr/local/bin/awscurl
usage: awscurl [-h] [-v] [-i] [-X REQUEST] [-d DATA] [-H HEADER] [-k] [--data-binary] [--region REGION] [--profile PROFILE] [--service SERVICE]
               [--access_key ACCESS_KEY] [--secret_key SECRET_KEY] [--security_token SECURITY_TOKEN] [--session_token SESSION_TOKEN]
               uri
awscurl: error: the following arguments are required: uri

[cyrfer]

Wow, great find @okigan !

pip is completely fixed now too.

$ ls /usr/local/Cellar/openssl
1.0.2r

$ brew switch openssl 1.0.2r
Cleaning /usr/local/Cellar/openssl/1.0.2r
Opt link created for /usr/local/Cellar/openssl/1.0.2r

$ pip --version
pip 19.0.3 from /usr/local/lib/python2.7/site-packages/pip (python 2.7)

[okigan]

@cyrfer Cool -- closing this issue 🤞