ubutnu16.04为python2.7安装pip模块

转载自https://blog.youkuaiyun.com/qq_41917697/article/details/114400002

 

ubuntu16.04的python2没有pip模块，python2安装pip2：

haypin@ubt:~/catkin_ws/src$ curl https://bootstrap.pypa.io/2.7/get-pip.py -o get-pip.py

  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current

                                 Dload  Upload   Total   Spent    Left  Speed

100   936  100   936    0     0    522      0  0:00:01  0:00:01 --:--:--   522

haypin@ubt:~/catkin_ws/src$ ls

beginner_tutorials  CMakeLists.txt  get-pip.py  package_manager  water_scripts  water_test

haypin@ubt:~/catkin_ws/src$ python2 get-pip.py

 

Hi there!

 

The URL you are using to fetch this script has changed, and this one will no

longer work. Please use get-pip.py from the following URL instead:

 

    https://bootstrap.pypa.io/pip/2.7/get-pip.py

 

Sorry if this change causes any inconvenience for you!

 

We don't have a good mechanism to make more gradual changes here, and this

renaming is a part of an effort to make it easier to us to update these

scripts, when there's a pip release. It's also essential for improving how we

handle the `get-pip.py` scripts, when pip drops support for a Python minor

version.

 

There are no more renames/URL changes planned, and we don't expect that a need

would arise to do this again in the near future.

 

Thanks for understanding!

 

- Pradyun, on behalf of the volunteers who maintain pip.

 

haypin@ubt:~/catkin_ws/src$ curl https://bootstrap.pypa.io/pip/2.7/get-pip.py -o get-pip.py

  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current

                                 Dload  Upload   Total   Spent    Left  Speed

100 1863k  100 1863k    0     0   4654      0  0:06:50  0:06:49  0:00:01 14070

haypin@ubt:~/catkin_ws/src$ python2 get-pip.py

DEPRECATION: Python 2.7 reached the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 is no longer maintained. pip 21.0 will drop support for Python 2.7 in January 2021. More details about Python 2 support in pip can be found at https://pip.pypa.io/en/latest/development/release-process/#python-2-support pip 21.0 will remove support for this functionality.

Defaulting to user installation because normal site-packages is not writeable

Collecting pip<21.0

  Downloading pip-20.3.4-py2.py3-none-any.whl (1.5 MB)

     |████████████████████████████████| 1.5 MB 19 kB/s

Collecting wheel

  Downloading wheel-0.36.2-py2.py3-none-any.whl (35 kB)

Installing collected packages: pip, wheel

Successfully installed pip-20.3.4 wheel-0.36.2

haypin@ubt:~/catkin_ws/src$ python2 -m pip -V

pip 20.3.4 from /home/haypin/.local/lib/python2.7/site-packages/pip (python 2.7)

haypin@ubt:~/catkin_ws/src$

 

 

 

 

 

python3升级pip3

haypin@ubt:~/catkin_ws/src$ python3 -m pip install --upgrade pip --force-reinstall        #不要这样做，安装的pip-8.1.1版本很低，使用还会出错

Collecting pip

  Downloading https://files.pythonhosted.org/packages/fe/ef/60d7ba03b5c442309ef42e7d69959f73aacccd0d86008362a681c4698e83/pip-21.0.1-py3-none-any.whl (1.5MB)

    100% |████████████████████████████████| 1.5MB 21kB/s

Installing collected packages: pip

Successfully installed pip-8.1.1

You are using pip version 8.1.1, however version 21.0.1 is available.

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

haypin@ubt:~/catkin_ws/src$

haypin@ubt:~/catkin_ws/src$ python3 -m pip install --upgrade pip         #pip-8.1.1升级会出错

Traceback (most recent call last):

  File "/usr/lib/python3.5/runpy.py", line 184, in _run_module_as_main

    "__main__", mod_spec)

  File "/usr/lib/python3.5/runpy.py", line 85, in _run_code

    exec(code, run_globals)

  File "/home/haypin/.local/lib/python3.5/site-packages/pip/__main__.py", line 21, in <module>

    from pip._internal.cli.main import main as _main

  File "/home/haypin/.local/lib/python3.5/site-packages/pip/_internal/cli/main.py", line 60

    sys.stderr.write(f"ERROR: {exc}")

                                   ^

SyntaxError: invalid syntax

haypin@ubt:~/catkin_ws/src$

还升级错了？那按照上面Python2安装pip2的方式重装一下python3的pip模块：

haypin@ubt:~$ python3 --version

Python 3.5.2

haypin@ubt:~$ curl https://bootstrap.pypa.io/pip/3.5/get-pip.py -o get-pip.py

  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current

                                 Dload  Upload   Total   Spent    Left  Speed

100 1863k  100 1863k    0     0  33994      0  0:00:56  0:00:56 --:--:-- 27178

haypin@ubt:~$ ls

catkin_ws  Documents  examples.desktop  Pictures  Redis_download  Templates

cpptest    Downloads  get-pip.py        Public    rosbag_replay   Videos

Desktop    dump.rdb   Music             pytest    ssh_codechina   VMwares

haypin@ubt:~$ python3 get-pip.py 

DEPRECATION: Python 3.5 reached the end of its life on September 13th, 2020. Please upgrade your Python as Python 3.5 is no longer maintained. pip 21.0 will drop support for Python 3.5 in January 2021. pip 21.0 will remove support for this functionality.

Defaulting to user installation because normal site-packages is not writeable

Collecting pip<21.0

  Using cached pip-20.3.4-py2.py3-none-any.whl (1.5 MB)

Installing collected packages: pip

  Attempting uninstall: pip

    Found existing installation: pip 21.0.1

    Uninstalling pip-21.0.1:

      Successfully uninstalled pip-21.0.1

Successfully installed pip-20.3.4

haypin@ubt:~$

haypin@ubt:~$ python3 -m pip -V

pip 20.3.4 from /home/haypin/.local/lib/python3.5/site-packages/pip (python 3.5)

haypin@ubt:~$