Develop Reference

Can not use pip install on Windows 10

When I was trying to install PyQt5 on Windows 10, I got the following error:
C:\Users\USER_NAME>pip install PyQt5
ERROR: Exception:
Traceback (most recent call last):
File "c:\users\andrew\appdata\local\programs\python\python39\lib\site-packages\pip\_internal\cli\base_command.py", line 180, in _main
status = self.run(options, args)
File "c:\users\andrew\appdata\local\programs\python\python39\lib\site-packages\pip\_internal\cli\req_command.py", line 205, in wrapper
return func(self, options, args)
File "c:\users\andrew\appdata\local\programs\python\python39\lib\site-packages\pip\_internal\commands\install.py", line 318, in run
requirement_set = resolver.resolve(
File "c:\users\andrew\appdata\local\programs\python\python39\lib\site-packages\pip\_internal\resolution\resolvelib\resolver.py", line 127, in resolve
result = self._result = resolver.resolve(
File "c:\users\andrew\appdata\local\programs\python\python39\lib\site-packages\pip\_vendor\resolvelib\resolvers.py", line 473, in resolve
state = resolution.resolve(requirements, max_rounds=max_rounds)
File "c:\users\andrew\appdata\local\programs\python\python39\lib\site-packages\pip\_vendor\resolvelib\resolvers.py", line 341, in resolve
name, crit = self._merge_into_criterion(r, parent=None)
File "c:\users\andrew\appdata\local\programs\python\python39\lib\site-packages\pip\_vendor\resolvelib\resolvers.py", line 172, in _merge_into_criterion
if not criterion.candidates:
File "c:\users\andrew\appdata\local\programs\python\python39\lib\site-packages\pip\_vendor\resolvelib\structs.py", line 139, in __bool__
return bool(self._sequence)
File "c:\users\andrew\appdata\local\programs\python\python39\lib\site-packages\pip\_internal\resolution\resolvelib\found_candidates.py", line 143, in __bool__
return any(self)
File "c:\users\andrew\appdata\local\programs\python\python39\lib\site-packages\pip\_internal\resolution\resolvelib\found_candidates.py", line 129, in <genexpr>
return (c for c in iterator if id(c) not in self._incompatible_ids)
File "c:\users\andrew\appdata\local\programs\python\python39\lib\site-packages\pip\_internal\resolution\resolvelib\found_candidates.py", line 30, in _iter_built
for version, func in infos:
File "c:\users\andrew\appdata\local\programs\python\python39\lib\site-packages\pip\_internal\resolution\resolvelib\factory.py", line 269, in iter_index_candidate_infos
result = self._finder.find_best_candidate(
File "c:\users\andrew\appdata\local\programs\python\python39\lib\site-packages\pip\_internal\index\package_finder.py", line 879, in find_best_candidate
candidates = self.find_all_candidates(project_name)
File "c:\users\andrew\appdata\local\programs\python\python39\lib\site-packages\pip\_internal\index\package_finder.py", line 824, in find_all_candidates
page_candidates = list(page_candidates_it)
File "c:\users\andrew\appdata\local\programs\python\python39\lib\site-packages\pip\_internal\index\sources.py", line 134, in page_candidates
yield from self._candidates_from_page(self._link)
File "c:\users\andrew\appdata\local\programs\python\python39\lib\site-packages\pip\_internal\index\package_finder.py", line 783, in process_project_url
html_page = self._link_collector.fetch_page(project_url)
File "c:\users\andrew\appdata\local\programs\python\python39\lib\site-packages\pip\_internal\index\collector.py", line 512, in fetch_page
return _get_html_page(location, session=self.session)
File "c:\users\andrew\appdata\local\programs\python\python39\lib\site-packages\pip\_internal\index\collector.py", line 422, in _get_html_page
resp = _get_html_response(url, session=session)
File "c:\users\andrew\appdata\local\programs\python\python39\lib\site-packages\pip\_internal\index\collector.py", line 120, in _get_html_response
resp = session.get(
File "c:\users\andrew\appdata\local\programs\python\python39\lib\site-packages\pip\_vendor\requests\sessions.py", line 555, in get
return self.request('GET', url, **kwargs)
File "c:\users\andrew\appdata\local\programs\python\python39\lib\site-packages\pip\_internal\network\session.py", line 449, in request
return super().request(method, url, *args, **kwargs)
File "c:\users\andrew\appdata\local\programs\python\python39\lib\site-packages\pip\_vendor\requests\sessions.py", line 542, in request
resp = self.send(prep, **send_kwargs)
File "c:\users\andrew\appdata\local\programs\python\python39\lib\site-packages\pip\_vendor\requests\sessions.py", line 655, in send
r = adapter.send(request, **kwargs)
File "c:\users\andrew\appdata\local\programs\python\python39\lib\site-packages\pip\_vendor\cachecontrol\adapter.py", line 53, in send
resp = super(CacheControlAdapter, self).send(request, **kw)
File "c:\users\andrew\appdata\local\programs\python\python39\lib\site-packages\pip\_vendor\requests\adapters.py", line 439, in send
resp = conn.urlopen(
File "c:\users\andrew\appdata\local\programs\python\python39\lib\site-packages\pip\_vendor\urllib3\connectionpool.py", line 696, in urlopen
self._prepare_proxy(conn)
File "c:\users\andrew\appdata\local\programs\python\python39\lib\site-packages\pip\_vendor\urllib3\connectionpool.py", line 964, in _prepare_proxy
conn.connect()
File "c:\users\andrew\appdata\local\programs\python\python39\lib\site-packages\pip\_vendor\urllib3\connection.py", line 359, in connect
conn = self._connect_tls_proxy(hostname, conn)
File "c:\users\andrew\appdata\local\programs\python\python39\lib\site-packages\pip\_vendor\urllib3\connection.py", line 500, in _connect_tls_proxy
return ssl_wrap_socket(
File "c:\users\andrew\appdata\local\programs\python\python39\lib\site-packages\pip\_vendor\urllib3\util\ssl_.py", line 432, in ssl_wrap_socket
ssl_sock = _ssl_wrap_socket_impl(sock, context, tls_in_tls)
File "c:\users\andrew\appdata\local\programs\python\python39\lib\site-packages\pip\_vendor\urllib3\util\ssl_.py", line 474, in _ssl_wrap_socket_impl
return ssl_context.wrap_socket(sock)
File "c:\users\andrew\appdata\local\programs\python\python39\lib\ssl.py", line 500, in wrap_socket
return self.sslsocket_class._create(
File "c:\users\andrew\appdata\local\programs\python\python39\lib\ssl.py", line 997, in _create
raise ValueError("check_hostname requires server_hostname")
ValueError: check_hostname requires server_hostname
I have tried all the methods on this link and none of them helps. What could be the problem here? I have spent a lot of time on this. Thank you so much!!!
I don't have a proxy server on my system, does it matter? It might not be the problem of PyQt5. It might be the problem of my system.

I would try downloading anaconda, it has the pyQt5 environment, also when downloading / installing, make sure you click the update path option.

Go through these below, but it'd also be helpful if you could verify that you have pip installed correctly with pip -V.
https://www.geeksforgeeks.org/how-to-install-pip-on-windows/
https://stackoverflow.com/a/44232032/12406158

not able to 'pip install' matplotlib

When I run pip install matplotlib or pip3 install matplotlib from my terminal, I get the following error. Can someone tell me why this is happening? I use ubuntu 16.04. Thanks in advance.
Collecting matplotlib
Exception:
Traceback (most recent call last):
File "/home/surya/.local/lib/python3.5/site-packages/pip/basecommand.py", line 215, in main
status = self.run(options, args)
File "/home/surya/.local/lib/python3.5/site-packages/pip/commands/install.py", line 335, in run
wb.build(autobuilding=True)
File "/home/surya/.local/lib/python3.5/site-packages/pip/wheel.py", line 749, in build
self.requirement_set.prepare_files(self.finder)
File "/home/surya/.local/lib/python3.5/site-packages/pip/req/req_set.py", line 380, in prepare_files
ignore_dependencies=self.ignore_dependencies))
File "/home/surya/.local/lib/python3.5/site-packages/pip/req/req_set.py", line 554, in _prepare_file
require_hashes
File "/home/surya/.local/lib/python3.5/site-packages/pip/req/req_install.py", line 278, in populate_link
self.link = finder.find_requirement(self, upgrade)
File "/home/surya/.local/lib/python3.5/site-packages/pip/index.py", line 465, in find_requirement
all_candidates = self.find_all_candidates(req.name)
File "/home/surya/.local/lib/python3.5/site-packages/pip/index.py", line 423, in find_all_candidates
for page in self._get_pages(url_locations, project_name):
File "/home/surya/.local/lib/python3.5/site-packages/pip/index.py", line 568, in _get_pages
page = self._get_page(location)
File "/home/surya/.local/lib/python3.5/site-packages/pip/index.py", line 683, in _get_page
return HTMLPage.get_page(link, session=self.session)
File "/home/surya/.local/lib/python3.5/site-packages/pip/index.py", line 792, in get_page
"Cache-Control": "max-age=600",
File "/home/surya/.local/lib/python3.5/site-packages/pip/_vendor/requests/sessions.py", line 488, in get
return self.request('GET', url, **kwargs)
File "/home/surya/.local/lib/python3.5/site-packages/pip/download.py", line 386, in request
return super(PipSession, self).request(method, url, *args, **kwargs)
File "/home/surya/.local/lib/python3.5/site-packages/pip/_vendor/requests/sessions.py", line 475, in request
resp = self.send(prep, **send_kwargs)
File "/home/surya/.local/lib/python3.5/site-packages/pip/_vendor/requests/sessions.py", line 596, in send
r = adapter.send(request, **kwargs)
File "/home/surya/.local/lib/python3.5/site-packages/pip/_vendor/cachecontrol/adapter.py", line 47, in send
resp = super(CacheControlAdapter, self).send(request, **kw)
File "/home/surya/.local/lib/python3.5/site-packages/pip/_vendor/requests/adapters.py", line 390, in send
conn = self.get_connection(request.url, proxies)
File "/home/surya/.local/lib/python3.5/site-packages/pip/_vendor/requests/adapters.py", line 290, in get_connection
proxy_manager = self.proxy_manager_for(proxy)
File "/home/surya/.local/lib/python3.5/site-packages/pip/_vendor/requests/adapters.py", line 184, in proxy_manager_for
**proxy_kwargs
File "/home/surya/.local/lib/python3.5/site-packages/pip/_vendor/requests/adapters.py", line 43, in SOCKSProxyManager
raise InvalidSchema("Missing dependencies for SOCKS support.")
pip._vendor.requests.exceptions.InvalidSchema: Missing dependencies for SOCKS support.

Many errors when trying to use pip

When trying to pip install any package (specifically, right now, gspread)...
Full message I get is:
Exception:
Traceback (most recent call last):
File "/Library/Python/2.7/site-packages/pip/basecommand.py", line 211, in main
status = self.run(options, args)
File "/Library/Python/2.7/site-packages/pip/commands/install.py", line 305, in run
wb.build(autobuilding=True)
File "/Library/Python/2.7/site-packages/pip/wheel.py", line 705, in build
self.requirement_set.prepare_files(self.finder)
File "/Library/Python/2.7/site-packages/pip/req/req_set.py", line 334, in prepare_files
functools.partial(self._prepare_file, finder))
File "/Library/Python/2.7/site-packages/pip/req/req_set.py", line 321, in _walk_req_to_install
more_reqs = handler(req_to_install)
File "/Library/Python/2.7/site-packages/pip/req/req_set.py", line 409, in _prepare_file
req_to_install, finder)
File "/Library/Python/2.7/site-packages/pip/req/req_set.py", line 365, in _check_skip_installed
finder.find_requirement(req_to_install, self.upgrade)
File "/Library/Python/2.7/site-packages/pip/index.py", line 486, in find_requirement
all_versions = self._find_all_versions(req.name)
File "/Library/Python/2.7/site-packages/pip/index.py", line 404, in _find_all_versions
index_locations = self._get_index_urls_locations(project_name)
File "/Library/Python/2.7/site-packages/pip/index.py", line 378, in _get_index_urls_locations
page = self._get_page(main_index_url)
File "/Library/Python/2.7/site-packages/pip/index.py", line 818, in _get_page
return HTMLPage.get_page(link, session=self.session)
File "/Library/Python/2.7/site-packages/pip/index.py", line 928, in get_page
"Cache-Control": "max-age=600",
File "/Library/Python/2.7/site-packages/pip/_vendor/requests/sessions.py", line 477, in get
return self.request('GET', url, **kwargs)
File "/Library/Python/2.7/site-packages/pip/download.py", line 373, in request
return super(PipSession, self).request(method, url, *args, **kwargs)
File "/Library/Python/2.7/site-packages/pip/_vendor/requests/sessions.py", line 465, in request
resp = self.send(prep, **send_kwargs)
File "/Library/Python/2.7/site-packages/pip/_vendor/requests/sessions.py", line 573, in send
r = adapter.send(request, **kwargs)
File "/Library/Python/2.7/site-packages/pip/_vendor/cachecontrol/adapter.py", line 46, in send
resp = super(CacheControlAdapter, self).send(request, **kw)
File "/Library/Python/2.7/site-packages/pip/_vendor/requests/adapters.py", line 370, in send
timeout=timeout
File "/Library/Python/2.7/site-packages/pip/_vendor/requests/packages/urllib3/connectionpool.py", line 544, in urlopen
body=body, headers=headers)
File "/Library/Python/2.7/site-packages/pip/_vendor/requests/packages/urllib3/connectionpool.py", line 344, in _make_request
self._raise_timeout(err=e, url=url, timeout_value=conn.timeout)
File "/Library/Python/2.7/site-packages/pip/_vendor/requests/packages/urllib3/connectionpool.py", line 314, in _raise_timeout
if 'timed out' in str(err) or 'did not complete (read)' in str(err): # Python 2.6
TypeError: __str__ returned non-string (type Error)
I am running high sierra,
which pip = /usr/local/bin/pip
python = 2.7.1
I am still new to python and this is my first time using it on this machine. I have googled a lot of different variations of this problem and am unable to figure out what I am doing wrong.
Sorry for such a simple question but any help would be appreciated. Thanks

PIp exception error while insalling django

I am installing django in ubuntu using the command pip install django==1.11.2 but i am getting the following error
Collecting django==1.11.2
Exception:
Traceback (most recent call last):
File "/usr/share/python-wheels/urllib3-1.13.1-py2.py3-none-any.whl/urllib3/connectionpool.py", line 555, in urlopen
self._prepare_proxy(conn)
File "/usr/share/python-wheels/urllib3-1.13.1-py2.py3-none-any.whl/urllib3/connectionpool.py", line 753, in _prepare_proxy
conn.connect()
File "/usr/share/python-wheels/urllib3-1.13.1-py2.py3-none-any.whl/urllib3/connection.py", line 230, in connect
self._tunnel()
File "/usr/lib/python3.5/http/client.py", line 832, in _tunnel
message.strip()))
OSError: Tunnel connection failed: 407 Proxy Authentication Required
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/pip/basecommand.py", line 209, in main
status = self.run(options, args)
File "/usr/lib/python3/dist-packages/pip/commands/install.py", line 328, in run
wb.build(autobuilding=True)
File "/usr/lib/python3/dist-packages/pip/wheel.py", line 748, in build
self.requirement_set.prepare_files(self.finder)
File "/usr/lib/python3/dist-packages/pip/req/req_set.py", line 360, in prepare_files
ignore_dependencies=self.ignore_dependencies))
File "/usr/lib/python3/dist-packages/pip/req/req_set.py", line 512, in _prepare_file
finder, self.upgrade, require_hashes)
File "/usr/lib/python3/dist-packages/pip/req/req_install.py", line 273, in populate_link
self.link = finder.find_requirement(self, upgrade)
File "/usr/lib/python3/dist-packages/pip/index.py", line 442, in find_requirement
all_candidates = self.find_all_candidates(req.name)
File "/usr/lib/python3/dist-packages/pip/index.py", line 400, in find_all_candidates
for page in self._get_pages(url_locations, project_name):
File "/usr/lib/python3/dist-packages/pip/index.py", line 545, in _get_pages
page = self._get_page(location)
File "/usr/lib/python3/dist-packages/pip/index.py", line 648, in _get_page
return HTMLPage.get_page(link, session=self.session)
File "/usr/lib/python3/dist-packages/pip/index.py", line 757, in get_page
"Cache-Control": "max-age=600",
File "/usr/share/python-wheels/requests-2.9.1-py2.py3-none-any.whl/requests/sessions.py", line 480, in get
return self.request('GET', url, **kwargs)
File "/usr/lib/python3/dist-packages/pip/download.py", line 378, in request
return super(PipSession, self).request(method, url, *args, **kwargs)
File "/usr/share/python-wheels/requests-2.9.1-py2.py3-none-any.whl/requests/sessions.py", line 468, in request
resp = self.send(prep, **send_kwargs)
File "/usr/share/python-wheels/requests-2.9.1-py2.py3-none-any.whl/requests/sessions.py", line 576, in send
r = adapter.send(request, **kwargs)
.
.
.
File "/usr/share/python-wheels/urllib3-1.13.1-py2.py3-none-any.whl/urllib3/util/retry.py", line 228, in increment
total -= 1
TypeError: unsupported operand type(s) for -=: 'Retry' and 'int'
i have also tried sudo -H pip install django==1.11.2 still the same error

Seems like the issue is with your internet connection. I believe you are under proxy. You need to set the proxy.

pip install error under virtual env

I am trying to install packages from inside the virtualenv
(Ubuntu 14.04LTS)
pip install scipy
I end up with the following error:
Collecting scipy
Exception:
Traceback (most recent call last):
File "/home/rduser/venvs/python2713/lib/python2.7/site-packages/pip/basecommand.py", line 215, in main
status = self.run(options, args)
File "/home/rduser/venvs/python2713/lib/python2.7/site-packages/pip/commands/install.py", line 324, in run
requirement_set.prepare_files(finder)
File "/home/rduser/venvs/python2713/lib/python2.7/site-packages/pip/req/req_set.py", line 380, in prepare_files
ignore_dependencies=self.ignore_dependencies))
File "/home/rduser/venvs/python2713/lib/python2.7/site-packages/pip/req/req_set.py", line 554, in _prepare_file
require_hashes
File "/home/rduser/venvs/python2713/lib/python2.7/site-packages/pip/req/req_install.py", line 278, in populate_link
self.link = finder.find_requirement(self, upgrade)
File "/home/rduser/venvs/python2713/lib/python2.7/site-packages/pip/index.py", line 465, in find_requirement
all_candidates = self.find_all_candidates(req.name)
File "/home/rduser/venvs/python2713/lib/python2.7/site-packages/pip/index.py", line 423, in find_all_candidates
for page in self._get_pages(url_locations, project_name):
File "/home/rduser/venvs/python2713/lib/python2.7/site-packages/pip/index.py", line 568, in _get_pages
page = self._get_page(location)
File "/home/rduser/venvs/python2713/lib/python2.7/site-packages/pip/index.py", line 683, in _get_page
return HTMLPage.get_page(link, session=self.session)
File "/home/rduser/venvs/python2713/lib/python2.7/site-packages/pip/index.py", line 792, in get_page
"Cache-Control": "max-age=600",
File "/home/rduser/venvs/python2713/lib/python2.7/site-packages/pip/_vendor/requests/sessions.py", line 488, in get
return self.request('GET', url, **kwargs)
File "/home/rduser/venvs/python2713/lib/python2.7/site-packages/pip/download.py", line 386, in request
return super(PipSession, self).request(method, url, *args, **kwargs)
File "/home/rduser/venvs/python2713/lib/python2.7/site-packages/pip/_vendor/requests/sessions.py", line 475, in request
resp = self.send(prep, **send_kwargs)
File "/home/rduser/venvs/python2713/lib/python2.7/site-packages/pip/_vendor/requests/sessions.py", line 596, in send
r = adapter.send(request, **kwargs)
File "/home/rduser/venvs/python2713/lib/python2.7/site-packages/pip/_vendor/cachecontrol/adapter.py", line 47, in send
resp = super(CacheControlAdapter, self).send(request, **kw)
File "/home/rduser/venvs/python2713/lib/python2.7/site-packages/pip/_vendor/requests/adapters.py", line 390, in send
conn = self.get_connection(request.url, proxies)
File "/home/rduser/venvs/python2713/lib/python2.7/site-packages/pip/_vendor/requests/adapters.py", line 290, in get_connection
proxy_manager = self.proxy_manager_for(proxy)
File "/home/rduser/venvs/python2713/lib/python2.7/site-packages/pip/_vendor/requests/adapters.py", line 184, in proxy_manager_for
**proxy_kwargs
File "/home/rduser/venvs/python2713/lib/python2.7/site-packages/pip/_vendor/requests/packages/urllib3/contrib/socks.py", line 154, in __init__
"Unable to determine SOCKS version from %s" % proxy_url
ValueError: Unable to determine SOCKS version from socks://10.0.0.28:8080/
How do I get past this.?
P.S: I am using the latest version of pip