I encountered the following error when installing imgaug using Python2.7:
root@user-desktop:~/samples# pip2 install imgaug
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 Please upgrade your Python as Python 2.7 is no longer maintained.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
Collecting imgaug
Using cached imgaug-0.4.0-py2.py3-none-any.whl (948 kB)
Collecting imageio
Using cached imageio-2.8.0.tar.gz (3.3 MB)
ERROR: Package 'imageio' requires a different Python: 2.7.17 not in '>=3.5'
Check the version of imageio and found the problem.
imageio 2.8.0
pip install imageio==2.8.0
Can only run on Python 3.5+
imageio 2.6.1
pip install imageio==2.6.1
Can run on Python 2.7 and 3.4+
Install 2.6.1 or an earlier version. The default version cannot be installed.