When using the PIP command to install, I encountered such an error:

C:\Users\86962>pip install Appium-Python-Client
Collecting Appium-Python-Client
  Downloading https://files.pythonhosted.org/packages/92/7e/b308cc3d94065a7491582d50343920f10ad441cab5f79ef9602f022d479f/Appium-Python-Client-0.26.tar.gz
Collecting selenium>=2.47.0 (from Appium-Python-Client)
  Downloading https://files.pythonhosted.org/packages/41/c6/78a9a0d0150dbf43095c6f422fdf6f948e18453c5ebbf92384175b372ca2/selenium-3.13.0-py2.py3-none-any.whl (946kB)
    10% |███▌                            | 102kB 2.2kB/s eta 0:06:23Exception:
Traceback (most recent call last):
  File "c:\python36\lib\site-packages\pip\_vendor\urllib3\response.py", line 302, in _error_catcher
    yield
  File "c:\python36\lib\site-packages\pip\_vendor\urllib3\response.py", line 384, in read
    data = self._fp.read(amt)
  File "c:\python36\lib\site-packages\pip\_vendor\cachecontrol\filewrapper.py", line 60, in read
    data = self.__fp.read(amt)
  File "c:\python36\lib\http\client.py", line 449, in read
    n = self.readinto(b)
  File "c:\python36\lib\http\client.py", line 493, in readinto
    n = self.fp.readinto(b)
  File "c:\python36\lib\socket.py", line 586, in readinto
    return self._sock.recv_into(b)
  File "c:\python36\lib\ssl.py", line 1009, in recv_into
    return self.read(nbytes, buffer)
  File "c:\python36\lib\ssl.py", line 871, in read
    return self._sslobj.read(len, buffer)
  File "c:\python36\lib\ssl.py", line 631, in read
    v = self._sslobj.read(len, buffer)
socket.timeout: The read operation timed out

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "c:\python36\lib\site-packages\pip\basecommand.py", line 215, in main
    status = self.run(options, args)
  File "c:\python36\lib\site-packages\pip\commands\install.py", line 324, in run
    requirement_set.prepare_files(finder)
  File "c:\python36\lib\site-packages\pip\req\req_set.py", line 380, in prepare_files
    ignore_dependencies=self.ignore_dependencies))
  File "c:\python36\lib\site-packages\pip\req\req_set.py", line 620, in _prepare_file
    session=self.session, hashes=hashes)
  File "c:\python36\lib\site-packages\pip\download.py", line 821, in unpack_url
    hashes=hashes
  File "c:\python36\lib\site-packages\pip\download.py", line 659, in unpack_http_url
    hashes)
  File "c:\python36\lib\site-packages\pip\download.py", line 882, in _download_http_url
    _download_url(resp, link, content_file, hashes)
  File "c:\python36\lib\site-packages\pip\download.py", line 603, in _download_url
    hashes.check_against_chunks(downloaded_chunks)
  File "c:\python36\lib\site-packages\pip\utils\hashes.py", line 46, in check_against_chunks
    for chunk in chunks:
  File "c:\python36\lib\site-packages\pip\download.py", line 571, in written_chunks
    for chunk in chunks:
  File "c:\python36\lib\site-packages\pip\utils\ui.py", line 139, in iter
    for x in it:
  File "c:\python36\lib\site-packages\pip\download.py", line 560, in resp_read
    decode_content=False):
  File "c:\python36\lib\site-packages\pip\_vendor\urllib3\response.py", line 436, in stream
    data = self.read(amt=amt, decode_content=decode_content)
  File "c:\python36\lib\site-packages\pip\_vendor\urllib3\response.py", line 401, in read
    raise IncompleteRead(self._fp_bytes_read, self.length_remaining)
  File "c:\python36\lib\contextlib.py", line 99, in __exit__
    self.gen.throw(type, value, traceback)
  File "c:\python36\lib\site-packages\pip\_vendor\urllib3\response.py", line 307, in _error_catcher
    raise ReadTimeoutError(self._pool, None, 'Read timed out.')
pip._vendor.urllib3.exceptions.ReadTimeoutError: HTTPSConnectionPool(host='files.pythonhosted.org', port=443): Read timed out.
You are using pip version 9.0.3, however version 10.0.1 is available.
You should consider upgrading via the 'python -m pip install --upgrade pip' command.

According to the prompt of error report:

You know, it’s because the version of my PIP module is a little old and needs to be updated, so it went on strike before it was updated

The solution is also very simple. Directly enter Python – M PIP install — upgrade PIP in the CMD command box, and then press enter. OK。 When it’s done ~~

Then you can continue to use PIP install to install the modules you need