sorting rows in a csv files using Pandas column wise with specific condition

Question

I have a quick question regarding sorting rows in a csv file using Pandas. The CSV file which I have has the data that looks like:

item,description,Qty,Price
BILL NO : 1121,,,
xxx,aaa,1,232
yyy,bbb,1,382
aaa,ccc,1,46
ccc,ddd,1,50
,,Total,856

I need to sort in the following way: sort the 1st column item on alphabet-wise. So the output should look like the following:

item,description,Qty,Price
BILL NO : 1121,,,
aaa,ccc,1,46
ccc,ddd,1,50
xxx,aaa,1,232
yyy,bbb,1,382
,,Total,856

Any help/suggestions?

Thanks!