[Turn] python in the query to use a function of

1. Use help (), query usage sum function of patients

   

2. Use the official document:

   1) Open the IDLE python:

   

   2) Click help, select python doc (which is the official document python, or you can directly press f1)

   

   3) the transfer out of the window, enter the function name query:

   

Then you give while keyword is not a function, it can not find the use of the method, the general finding is very simple to use, but also generally on those few keywords