Get total of Pandas column

I have a Pandas data frame, as shown below, with multiple columns and would like to get the total of column, MyColumn.

           X           MyColumn      Y              Z   0          A           84         13.0           69.0   1          B           76         77.0          127.0   2          C           28         69.0           16.0   3          D           28         28.0           31.0   4          E           19         20.0           85.0   5          F           84        193.0           70.0   

Expected Output

I'd have expected the output to be the total of this column: 319.

Or alternatively, I would like df to be edited with a new row entitled TOTAL containing the total:

           X           MyColumn      Y              Z   0          A           84         13.0           69.0   1          B           76         77.0          127.0   2          C           28         69.0           16.0   3          D           28         28.0           31.0   4          E           19         20.0           85.0   5          F           84        193.0           70.0   TOTAL                  319

I have attempted to get the sum of the column using groupby and .sum():

Total = df.groupby['MyColumn'].sum()

This causes the following error:

TypeError: 'instancemethod' object has no attribute '__getitem__'