if your python have module pip, it will be very easy,

just type following sentence:

pip install biopython

So we first install pip:

I try "python -m ensurepip" to install pip, but Ubantu not support that,

"apt-get install python-pip" is work

安装pip3

https://www.cnblogs.com/wenchengxiaopenyou/p/5709218.html