[heroku] Error when upgrading prod app form cedar to cedar-14 (no error on the staging app)

cedar-14-error.log

remote: -----> Python app detected
remote: ERROR:root:code for hash md5 was not found.
remote: Traceback (most recent call last):
remote:   File "/app/.heroku/python/lib/python2.7/hashlib.py", line 139, in <module>
remote:     globals()[__func_name] = __get_hash(__func_name)
remote:   File "/app/.heroku/python/lib/python2.7/hashlib.py", line 91, in __get_builtin_constructor
remote:     raise ValueError('unsupported hash type ' + name)
remote: ValueError: unsupported hash type md5
remote: ERROR:root:code for hash sha1 was not found.
remote: Traceback (most recent call last):
remote:   File "/app/.heroku/python/lib/python2.7/hashlib.py", line 139, in <module>
remote:     globals()[__func_name] = __get_hash(__func_name)
remote:   File "/app/.heroku/python/lib/python2.7/hashlib.py", line 91, in __get_builtin_constructor
remote:     raise ValueError('unsupported hash type ' + name)
remote: ValueError: unsupported hash type sha1
remote: ERROR:root:code for hash sha224 was not found.
remote: Traceback (most recent call last):
remote:   File "/app/.heroku/python/lib/python2.7/hashlib.py", line 139, in <module>
remote:     globals()[__func_name] = __get_hash(__func_name)
remote:   File "/app/.heroku/python/lib/python2.7/hashlib.py", line 91, in __get_builtin_constructor
remote:     raise ValueError('unsupported hash type ' + name)
remote: ValueError: unsupported hash type sha224
remote: ERROR:root:code for hash sha256 was not found.
remote: Traceback (most recent call last):
remote:   File "/app/.heroku/python/lib/python2.7/hashlib.py", line 139, in <module>
remote:     globals()[__func_name] = __get_hash(__func_name)
remote:   File "/app/.heroku/python/lib/python2.7/hashlib.py", line 91, in __get_builtin_constructor
remote:     raise ValueError('unsupported hash type ' + name)
remote: ValueError: unsupported hash type sha256
remote: ERROR:root:code for hash sha384 was not found.
remote: Traceback (most recent call last):
remote:   File "/app/.heroku/python/lib/python2.7/hashlib.py", line 139, in <module>
remote:     globals()[__func_name] = __get_hash(__func_name)
remote:   File "/app/.heroku/python/lib/python2.7/hashlib.py", line 91, in __get_builtin_constructor
remote:     raise ValueError('unsupported hash type ' + name)
remote: ValueError: unsupported hash type sha384
remote: ERROR:root:code for hash sha512 was not found.
remote: Traceback (most recent call last):
remote:   File "/app/.heroku/python/lib/python2.7/hashlib.py", line 139, in <module>
remote:     globals()[__func_name] = __get_hash(__func_name)
remote:   File "/app/.heroku/python/lib/python2.7/hashlib.py", line 91, in __get_builtin_constructor
remote:     raise ValueError('unsupported hash type ' + name)
remote: ValueError: unsupported hash type sha512
remote: Traceback (most recent call last):
remote:   File "/app/.heroku/python/bin/pip", line 9, in <module>
remote:     load_entry_point('pip==6.1.1', 'console_scripts', 'pip')()
remote:   File "/app/.heroku/python/lib/python2.7/site-packages/distribute-0.6.36-py2.7.egg/pkg_resources.py", line 343, in load_entry_point
remote:     return get_distribution(dist).load_entry_point(group, name)
remote:   File "/app/.heroku/python/lib/python2.7/site-packages/distribute-0.6.36-py2.7.egg/pkg_resources.py", line 2309, in load_entry_point
remote:     return ep.load()
remote:   File "/app/.heroku/python/lib/python2.7/site-packages/distribute-0.6.36-py2.7.egg/pkg_resources.py", line 2015, in load
remote:     entry = __import__(self.module_name, globals(),globals(), ['__name__'])
remote:   File "/app/.heroku/python/lib/python2.7/site-packages/pip-6.1.1-py2.7.egg/pip/__init__.py", line 15, in <module>
remote:     from pip.vcs import git, mercurial, subversion, bazaar  # noqa
remote:   File "/app/.heroku/python/lib/python2.7/site-packages/pip-6.1.1-py2.7.egg/pip/vcs/mercurial.py", line 10, in <module>
remote:     from pip.download import path_to_url
remote:   File "/app/.heroku/python/lib/python2.7/site-packages/pip-6.1.1-py2.7.egg/pip/download.py", line 32, in <module>
remote:     from pip._vendor import requests, six
remote:   File "/app/.heroku/python/lib/python2.7/site-packages/pip-6.1.1-py2.7.egg/pip/_vendor/__init__.py", line 92, in load_module
remote:     raise ImportError("No module named '%s'" % (name,))
remote: ImportError: No module named 'pip._vendor.requests'
remote: ERROR:root:code for hash md5 was not found.
remote: Traceback (most recent call last):
remote:   File "/app/.heroku/python/lib/python2.7/hashlib.py", line 139, in <module>
remote:     globals()[__func_name] = __get_hash(__func_name)
remote:   File "/app/.heroku/python/lib/python2.7/hashlib.py", line 91, in __get_builtin_constructor
remote:     raise ValueError('unsupported hash type ' + name)
remote: ValueError: unsupported hash type md5
remote: ERROR:root:code for hash sha1 was not found.
remote: Traceback (most recent call last):
remote:   File "/app/.heroku/python/lib/python2.7/hashlib.py", line 139, in <module>
remote:     globals()[__func_name] = __get_hash(__func_name)
remote:   File "/app/.heroku/python/lib/python2.7/hashlib.py", line 91, in __get_builtin_constructor
remote:     raise ValueError('unsupported hash type ' + name)
remote: ValueError: unsupported hash type sha1
remote: ERROR:root:code for hash sha224 was not found.
remote: Traceback (most recent call last):
remote:   File "/app/.heroku/python/lib/python2.7/hashlib.py", line 139, in <module>
remote:     globals()[__func_name] = __get_hash(__func_name)
remote:   File "/app/.heroku/python/lib/python2.7/hashlib.py", line 91, in __get_builtin_constructor
remote:     raise ValueError('unsupported hash type ' + name)
remote: ValueError: unsupported hash type sha224
remote: ERROR:root:code for hash sha256 was not found.
remote: Traceback (most recent call last):
remote:   File "/app/.heroku/python/lib/python2.7/hashlib.py", line 139, in <module>
remote:     globals()[__func_name] = __get_hash(__func_name)
remote:   File "/app/.heroku/python/lib/python2.7/hashlib.py", line 91, in __get_builtin_constructor
remote:     raise ValueError('unsupported hash type ' + name)
remote: ValueError: unsupported hash type sha256
remote: ERROR:root:code for hash sha384 was not found.
remote: Traceback (most recent call last):
remote:   File "/app/.heroku/python/lib/python2.7/hashlib.py", line 139, in <module>
remote:     globals()[__func_name] = __get_hash(__func_name)
remote:   File "/app/.heroku/python/lib/python2.7/hashlib.py", line 91, in __get_builtin_constructor
remote:     raise ValueError('unsupported hash type ' + name)
remote: ValueError: unsupported hash type sha384
remote: ERROR:root:code for hash sha512 was not found.
remote: Traceback (most recent call last):
remote:   File "/app/.heroku/python/lib/python2.7/hashlib.py", line 139, in <module>
remote:     globals()[__func_name] = __get_hash(__func_name)
remote:   File "/app/.heroku/python/lib/python2.7/hashlib.py", line 91, in __get_builtin_constructor
remote:     raise ValueError('unsupported hash type ' + name)
remote: ValueError: unsupported hash type sha512
remote: Traceback (most recent call last):
remote:   File "/app/tmp/buildpacks/python/vendor/pip-pop/pip-diff", line 15, in <module>
remote:     from pip.req import parse_requirements
remote:   File "/app/.heroku/python/lib/python2.7/site-packages/pip-6.1.1-py2.7.egg/pip/__init__.py", line 15, in <module>
remote:     from pip.vcs import git, mercurial, subversion, bazaar  # noqa
remote:   File "/app/.heroku/python/lib/python2.7/site-packages/pip-6.1.1-py2.7.egg/pip/vcs/mercurial.py", line 10, in <module>
remote:     from pip.download import path_to_url
remote:   File "/app/.heroku/python/lib/python2.7/site-packages/pip-6.1.1-py2.7.egg/pip/download.py", line 32, in <module>
remote:     from pip._vendor import requests, six
remote:   File "/app/.heroku/python/lib/python2.7/site-packages/pip-6.1.1-py2.7.egg/pip/_vendor/__init__.py", line 92, in load_module
remote:     raise ImportError("No module named '%s'" % (name,))
remote: ImportError: No module named 'pip._vendor.requests'
remote:      $ pip install -r requirements.txt
remote:        ERROR:root:code for hash md5 was not found.
remote:        Traceback (most recent call last):
remote:          File "/app/.heroku/python/lib/python2.7/hashlib.py", line 139, in <module>
remote:            globals()[__func_name] = __get_hash(__func_name)
remote:          File "/app/.heroku/python/lib/python2.7/hashlib.py", line 91, in __get_builtin_constructor
remote:            raise ValueError('unsupported hash type ' + name)
remote:        ValueError: unsupported hash type md5
remote:        ERROR:root:code for hash sha1 was not found.
remote:        Traceback (most recent call last):
remote:          File "/app/.heroku/python/lib/python2.7/hashlib.py", line 139, in <module>
remote:            globals()[__func_name] = __get_hash(__func_name)
remote:          File "/app/.heroku/python/lib/python2.7/hashlib.py", line 91, in __get_builtin_constructor
remote:            raise ValueError('unsupported hash type ' + name)
remote:        ValueError: unsupported hash type sha1
remote:        ERROR:root:code for hash sha224 was not found.
remote:        Traceback (most recent call last):
remote:          File "/app/.heroku/python/lib/python2.7/hashlib.py", line 139, in <module>
remote:            globals()[__func_name] = __get_hash(__func_name)
remote:          File "/app/.heroku/python/lib/python2.7/hashlib.py", line 91, in __get_builtin_constructor
remote:            raise ValueError('unsupported hash type ' + name)
remote:        ValueError: unsupported hash type sha224
remote:        ERROR:root:code for hash sha256 was not found.
remote:        Traceback (most recent call last):
remote:          File "/app/.heroku/python/lib/python2.7/hashlib.py", line 139, in <module>
remote:            globals()[__func_name] = __get_hash(__func_name)
remote:          File "/app/.heroku/python/lib/python2.7/hashlib.py", line 91, in __get_builtin_constructor
remote:            raise ValueError('unsupported hash type ' + name)
remote:        ValueError: unsupported hash type sha256
remote:        ERROR:root:code for hash sha384 was not found.
remote:        Traceback (most recent call last):
remote:          File "/app/.heroku/python/lib/python2.7/hashlib.py", line 139, in <module>
remote:            globals()[__func_name] = __get_hash(__func_name)
remote:          File "/app/.heroku/python/lib/python2.7/hashlib.py", line 91, in __get_builtin_constructor
remote:            raise ValueError('unsupported hash type ' + name)
remote:        ValueError: unsupported hash type sha384
remote:        ERROR:root:code for hash sha512 was not found.
remote:        Traceback (most recent call last):
remote:          File "/app/.heroku/python/lib/python2.7/hashlib.py", line 139, in <module>
remote:            globals()[__func_name] = __get_hash(__func_name)
remote:          File "/app/.heroku/python/lib/python2.7/hashlib.py", line 91, in __get_builtin_constructor
remote:            raise ValueError('unsupported hash type ' + name)
remote:        ValueError: unsupported hash type sha512
remote:        Traceback (most recent call last):
remote:          File "/app/.heroku/python/bin/pip", line 9, in <module>
remote:            load_entry_point('pip==6.1.1', 'console_scripts', 'pip')()
remote:          File "/app/.heroku/python/lib/python2.7/site-packages/distribute-0.6.36-py2.7.egg/pkg_resources.py", line 343, in load_entry_point
remote:            return get_distribution(dist).load_entry_point(group, name)
remote:          File "/app/.heroku/python/lib/python2.7/site-packages/distribute-0.6.36-py2.7.egg/pkg_resources.py", line 2309, in load_entry_point
remote:            return ep.load()
remote:          File "/app/.heroku/python/lib/python2.7/site-packages/distribute-0.6.36-py2.7.egg/pkg_resources.py", line 2015, in load
remote:            entry = __import__(self.module_name, globals(),globals(), ['__name__'])
remote:          File "/app/.heroku/python/lib/python2.7/site-packages/pip-6.1.1-py2.7.egg/pip/__init__.py", line 15, in <module>
remote:            from pip.vcs import git, mercurial, subversion, bazaar  # noqa
remote:          File "/app/.heroku/python/lib/python2.7/site-packages/pip-6.1.1-py2.7.egg/pip/vcs/mercurial.py", line 10, in <module>
remote:            from pip.download import path_to_url
remote:          File "/app/.heroku/python/lib/python2.7/site-packages/pip-6.1.1-py2.7.egg/pip/download.py", line 32, in <module>
remote:            from pip._vendor import requests, six
remote:          File "/app/.heroku/python/lib/python2.7/site-packages/pip-6.1.1-py2.7.egg/pip/_vendor/__init__.py", line 92, in load_module
remote:            raise ImportError("No module named '%s'" % (name,))
remote:        ImportError: No module named 'pip._vendor.requests'
remote: 
remote:  !     Push rejected, failed to compile Python app

did you get anywhere with this? im having the same issue

This is how I got it working:

$ heroku plugins:install heroku-repo
$ heroku repo:purge_cache -a <my-app-name>
$ git push heroku master