sudo apt install python3-pip 执行命令，显示已经安装成功，但是，执行的时候却找不到pip3

    user@conti-del-lp-018:~/Documents/backup_code/RF$ sudo pip3 install --upgrade pip
    sudo: pip3: command not found

    解决办法

user@conti-del-lp-018:~$ dpkg -L python3-pip

....

/usr/share
/usr/share/man
/usr/share/man/man1
/usr/share/man/man1/pip3.1.gz
/usr/share/doc
/usr/share/doc/python3-pip
/usr/share/doc/python3-pip/copyright
/usr/bin
/usr/bin/pip3
/usr/share/doc/python3-pip/changelog.Debian.gz

user@conti-del-lp-018:~$ sudo ln -s /usr/bin/pip3 /usr/local/bin/pip3

2. sudo pip3 install -U -f https://extras.wxpython.org/wxPython4/extras/linux/gtk3/ubuntu-16.04 wxPython

报如下错误：

      Error running configure
    ERROR: failed building wxWidgets
    Traceback (most recent call last):
      File "build.py", line 1471, in cmd_build_wx
        wxbuild.main(wxDir(), build_options)
      File "/tmp/pip-build-0crvl0jr/wxPython/buildtools/build_wxwidgets.py", line 373, in main
        "Error running configure")
      File "/tmp/pip-build-0crvl0jr/wxPython/buildtools/build_wxwidgets.py", line 85, in exitIfError
        raise builder.BuildError(msg)
    buildtools.builder.BuildError: Error running configure
    Finished command: build_wx (0m3.191s)
    Finished command: build (0m3.191s)
    Command '"/usr/bin/python3" -u build.py build' failed with exit code 1.

解决办法：