pip install下载工具时报错，出现：

    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/tmp/pip-build-BiRqgr/decorator/setup.py", line 4, in <module>
        exec(open('src/decorator.py').read(), dic)  # extract the __version__
      File "<string>", line 162
        print('Error in generated code:', file=sys.stderr)
                                              ^
    SyntaxError: invalid syntax

    ----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-BiRqgr/decorator/

解决步骤:

sudo apt-get purge python-pip
sudo apt-get install python-pip
sudo pip3 install --upgrade pip
#如果pip3无效则需要先安装python3和pip3
sudo pip install --upgrade setuptools

pip install jenkins

重新安装decorator：

sudo apt install --reinstall python*-decorator