I have two python installed in my computer, py2.6 and 3.7, the odoo10 works fine BUT when I run the odoo12, it gives me

Traceback (most recent call last):
File "C:\projects\odoo12\odoo-bin", line 5, in <module>
import odoo
File "C:\projects\odoo12\odoo\__init__.py", line 73, in <module>
import babel
ModuleNotFoundError: No module named 'babel'

But I already installed babel when I used odoo10, how will I fix this? Thank u in advance