1.报错：ReadTimeoutError: HTTPSConnectionPool(host=’pypi.python.org’, port=443): Read timed out.

Downloading xgboost-0.6a2.tar.gz (1.2MB)

    48% |███████████████▋                | 583kB 47kB/s eta 0:00:13Exception:

Traceback (most recent call last):

  File "c:\python27\lib\site-packages\pip\basecommand.py", line 215, in main

    status = self.run(options, args)

  File "c:\python27\lib\site-packages\pip\commands\install.py", line 335, in run

    wb.build(autobuilding=True)

  File "c:\python27\lib\site-packages\pip\wheel.py", line 749, in build

    self.requirement_set.prepare_files(self.finder)

  File "c:\python27\lib\site-packages\pip\req\req_set.py", line 380, in prepare_files

    ignore_dependencies=self.ignore_dependencies))

  File "c:\python27\lib\site-packages\pip\req\req_set.py", line 620, in _prepare_file

    session=self.session, hashes=hashes)

  File "c:\python27\lib\site-packages\pip\download.py", line 821, in unpack_url

    hashes=hashes

  File "c:\python27\lib\site-packages\pip\download.py", line 659, in unpack_http_url

    hashes)

  File "c:\python27\lib\site-packages\pip\download.py", line 882, in _download_http_url

    _download_url(resp, link, content_file, hashes)

  File "c:\python27\lib\site-packages\pip\download.py", line 603, in _download_url

    hashes.check_against_chunks(downloaded_chunks)

  File "c:\python27\lib\site-packages\pip\utils\hashes.py", line 46, in check_against_chunks

    for chunk in chunks:

  File "c:\python27\lib\site-packages\pip\download.py", line 571, in written_chunks

    for chunk in chunks:

  File "c:\python27\lib\site-packages\pip\utils\ui.py", line 139, in iter

    for x in it:

  File "c:\python27\lib\site-packages\pip\download.py", line 560, in resp_read

    decode_content=False):

  File "c:\python27\lib\site-packages\pip\_vendor\requests\packages\urllib3\response.py", line 357, in stream

    data = self.read(amt=amt, decode_content=decode_content)

  File "c:\python27\lib\site-packages\pip\_vendor\requests\packages\urllib3\response.py", line 324, in read

    flush_decoder = True

  File "c:\python27\lib\contextlib.py", line 35, in __exit__

    self.gen.throw(type, value, traceback)

  File "c:\python27\lib\site-packages\pip\_vendor\requests\packages\urllib3\response.py", line 246, in _error_catcher

    raise ReadTimeoutError(self._pool, None, 'Read timed out.')

ReadTimeoutError: HTTPSConnectionPool(host='pypi.python.org', port=443): Read timed out.

错误原因：连不上pip的源，下载依赖包失败

解决1(推荐)：在pip安装所在文件夹路径下，创造python文件(.py)

import os  

ini="""[global] 

index-url = https://pypi.doubanio.com/simple/ 

[install] 

trusted-host=pypi.doubanio.com 

"""  

pippath=os.environ["USERPROFILE"]+"\\pip\\"  

if not os.path.exists(pippath):  

    os.mkdir(pippath)  

with open(pippath+"pip.ini","w+") as f:  

    f.write(ini)  

在cmd上运行这个.py文件即可

之后再用pip install安装指令下载速度会非常快

解决2：修改加大超时时间

pip --default-timeout=100 install -U pip

1

如下指令安装

pip --default-timeout=100 install -U scrapy(库名）

1

解决3：到https://pypi.python.org/simple/pip/下载相对应的.whl文件

下载完之后，在用pip安装：

pip install (path)/pip-8.1.2-py2.py3-none-any.whl