如何解决“'NoneType' 对象不可下标”的问题？

Question

I am trying to conditionally select all the cells in the range in excel by python, but this shows every time. 'NoneType' object is not subscriptable Is there a way to fix it?

I have already tried to put a str around ws.cell(...) , but it still does not work.

target_list = []

for i in range(1,20638):
    for j in range(1,49):
        if ws.cell(row = i, column = j).value[0:4] == "Drug":
            target_list.append(ws.cell(row = i, column = j).value[5:])
        else:
            pass 

I expect to select all the cells that begin with the word "Drug" , but it shows '"'NoneType' object is not subscriptable' every time.'

Answer 1

Just add a check before that line:

target_list = []

for i in range(1,20638):
    for j in range(1,49):
        if (ws.cell(row = i, column = j).value) is None:
            continue
        if ws.cell(row = i, column = j).value[0:4] == "Drug":
            target_list.append(ws.cell(row = i, column = j).value[5:])
        else:
            pass