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#升級pip包管理工具

C:\Users\Administrator>python -m pip install --upgrade pip    

Looking in indexes: http://mirrors.aliyun.com/pypi/simple

Collecting pip

  Downloading http://mirrors.aliyun.com/pypi/packages/cb/28/91f26bd088ce8e22169032100d4260614fc3da435025ff389ef1d396a433/p

     |████████████████████████████████| 1.5MB 1.7MB/s

Installing collected packages: pip

  Found existing installation: pip 19.2.3

    Uninstalling pip-19.2.3:

      Successfully uninstalled pip-19.2.3

Successfully installed pip-20.2.4

#pip檢查哪些包需要更新

C:\Users\Administrator>pip list --outdated   

Package    Version Latest Type

---------- ------- ------ -----

setuptools 41.2.0  50.3.2 wheel

C:\Users\Administrator>

#通過 pip升級包 setuptools

C:\Users\Administrator>pip install --upgrade setuptools

Looking in indexes: http://mirrors.aliyun.com/pypi/simple

Collecting setuptools

  Downloading http://mirrors.aliyun.com/pypi/packages/6d/38/c21ef5034684ffc0412deefbb07d66678332290c14bb5269c85145fbd55e/setuptools-50.3.2-py3-none-any.whl (785 kB)

     |████████████████████████████████| 785 kB 1.7 MB/s

Installing collected packages: setuptools

  Attempting uninstall: setuptools

    Found existing installation: setuptools 41.2.0

    Uninstalling setuptools-41.2.0:

      Successfully uninstalled setuptools-41.2.0

Successfully installed setuptools-50.3.2

C:\Users\Administrator>

#通過pip安裝 requests 包

C:\Users\Administrator>pip install requests      

Looking in indexes: http://mirrors.aliyun.com/pypi/simple

Collecting requests

  Downloading http://mirrors.aliyun.com/pypi/packages/45/1e/0c169c6a5381e241ba7404532c16a21d86ab872c9bed8bdcd4c423954103/requests-2.24.0-py2.py3-none-any.whl (61kB)

     |████████████████████████████████| 71kB 2.3MB/s

Collecting urllib3!=1.25.0,!=1.25.1,<1.26,>=1.21.1 (from requests)

  Downloading http://mirrors.aliyun.com/pypi/packages/56/aa/4ef5aa67a9a62505db124a5cb5262332d1d4153462eb8fd89c9fa41e5d92/urllib3-1.25.11-py2.py3-none-any.whl (127kB)

     |████████████████████████████████| 133kB 1.6MB/s

Collecting chardet<4,>=3.0.2 (from requests)

  Downloading http://mirrors.aliyun.com/pypi/packages/bc/a9/01ffebfb562e4274b6487b4bb1ddec7ca55ec7510b22e4c51f14098443b8/chardet-3.0.4-py2.py3-none-any.whl (133kB)

     |████████████████████████████████| 143kB 2.2MB/s

Collecting idna<3,>=2.5 (from requests)

  Downloading http://mirrors.aliyun.com/pypi/packages/a2/38/928ddce2273eaa564f6f50de919327bf3a00f091b5baba8dfa9460f3a8a8/idna-2.10-py2.py3-none-any.whl (58kB)

     |████████████████████████████████| 61kB 4.1MB/s

Collecting certifi>=2017.4.17 (from requests)

  Downloading http://mirrors.aliyun.com/pypi/packages/5e/c4/6c4fe722df5343c33226f0b4e0bb042e4dc13483228b4718baf286f86d87/certifi-2020.6.20-py2.py3-none-any.whl (156kB)

     |████████████████████████████████| 163kB 2.2MB/s

Installing collected packages: urllib3, chardet, idna, certifi, requests

Successfully installed certifi-2020.6.20 chardet-3.0.4 idna-2.10 requests-2.24.0 urllib3-1.25.11

WARNING: You are using pip version 19.2.3, however version 20.2.4 is available.

You should consider upgrading via the 'python -m pip install --upgrade pip' command.

#pip查看是否已安裝

C:\Users\Administrator>pip show requests

Name: requests         #包名

Version: 2.24.0        #版本號

Summary: Python HTTP for Humans.

Home-page: https://requests.readthedocs.io

Author: Kenneth Reitz

Author-email: me@kennethreitz.org

License: Apache 2.0

Location: d:\python\python38\lib\site-packages   #包安裝位置

Requires: urllib3, chardet, idna, certifi

Required-by:

C:\Users\Administrator>

#安裝Redis 是一個開源（BSD許可）的，內(nèi)存中的數(shù)據(jù)結構存儲系統(tǒng)，它可以用作數(shù)據(jù)庫、緩存和消息中間件。

C:\Users\Administrator>pip install redis

Looking in indexes: http://mirrors.aliyun.com/pypi/simple

Collecting redis

  Downloading http://mirrors.aliyun.com/pypi/packages/a7/7c/24fb0511df653cf1a5d938d8f5d19802

     |████████████████████████████████| 72 kB 213 kB/s

Installing collected packages: redis

Successfully installed redis-3.5.3

C:\Users\Administrator>

#卸載 redis 包

C:\Users\Administrator>pip uninstall redis

Found existing installation: redis 3.5.3

Uninstalling redis-3.5.3:

  Would remove:

    d:\python\python38\lib\site-packages\redis-3.5.3.dist-info\

    d:\python\python38\lib\site-packages\redis\*

Proceed (y/n)? y

  Successfully uninstalled redis-3.5.3

C:\Users\Administrator>

#pip幫助參數(shù)解釋

C:\Users\Administrator>pip --help

Usage:

  pip <command> [options]

Commands:

  install                     Install packages.

  download                    Download packages.

  uninstall                   Uninstall packages.

  freeze                      Output installed packages in requirements format.

  list                        List installed packages.

  show                        Show information about installed packages.

  check                       Verify installed packages have compatible dependencies.

  config                      Manage local and global configuration.

  search                      Search PyPI for packages.

  cache                       Inspect and manage pip's wheel cache.

  wheel                       Build wheels from your requirements.

  hash                        Compute hashes of package archives.

  completion                  A helper command used for command completion.

  debug                       Show information useful for debugging.

  help                        Show help for commands.

General Options:

  -h, --help                  Show help.

  --isolated                  Run pip in an isolated mode, ignoring environment variables and user

                              configuration.

  -v, --verbose               Give more output. Option is additive, and can be used up to 3 times.

  -V, --version               Show version and exit.

  -q, --quiet                 Give less output. Option is additive, and can be used up to 3 times

                              (corresponding to WARNING, ERROR, and CRITICAL logging levels).

  --log <path>                Path to a verbose appending log.

  --no-input                  Disable prompting for input.

  --proxy <proxy>             Specify a proxy in the form [user:passwd@]proxy.server:port.

  --retries <retries>         Maximum number of retries each connection should attempt (default 5

                              times).

  --timeout <sec>             Set the socket timeout (default 15 seconds).

  --exists-action <action>    Default action when a path already exists: (s)witch, (i)gnore,

                              (w)ipe, (b)ackup, (a)bort.

  --trusted-host <hostname>   Mark this host or host:port pair as trusted, even though it does not

                              have valid or any HTTPS.

  --cert <path>               Path to alternate CA bundle.

  --client-cert <path>        Path to SSL client certificate, a single file containing the private

                              key and the certificate in PEM format.

  --cache-dir <dir>           Store the cache data in <dir>.

  --no-cache-dir              Disable the cache.

  --disable-pip-version-check

                              Don't periodically check PyPI to determine whether a new version of

                              pip is available for download. Implied with --no-index.

  --no-color                  Suppress colored output

  --no-python-version-warning

                              Silence deprecation warnings for upcoming unsupported Pythons.

  --use-feature <feature>     Enable new functionality, that may be backward incompatible.

  --use-deprecated <feature>  Enable deprecated functionality, that will be removed in the future.

C:\Users\Administrator>