How to get a specific level GO term respectively for genes in a list in Python?

Question

[Peng]

Hi All, I'm quite a new hand in bioinformatics. I'm having a problem in getting gene's corresponding GO term # in Python. Now I've got a list of gene ID as a column in the data frame, and wanna add a new column to display the GO term ID of each gene at each row. I want the term results to be set to a particular level in order to make it a 1 to 1 relationship(one gene to one GO term). Is there any way to achieve this request in Python? Many thanks!