[Python] Python - What Causes a List Index to be Out Of Range

I am not sure why I am getting the list out of range error. Everything seems to be fine. I even individually checked the index value.

Error is at if pairs[j] == all_list[ii][jj]:


list_1 = ['Wire#1', 'Wire#3', 'Wire#4']
list_2 = ['Wire#5', 'Wire#8', 'Wire#13']
all_list = [list_1, list_2]

pairs = [
["Wire#3","Wire#13"],
["Wire#4","Wire#8"],
["Wire#1","Wire#5"],
]

new_wire_list = []
for i in range(0, len(pairs)):
if len(pairs) > 1:
new_text = ""
for char in range(0, len(pairs)):
new_text += pairs[char] + "_"
new_wire_list.append(new_text)
for j in range(0, len(pairs)):
for ii in range(0, len(all_list)):
for jj in range(0, len(all_list[ii])):
if pairs[j] == all_list[ii][jj]:
index_of = all_list[ii][jj].index(pairs[j])
all_list[ii].pop(index_of)
print(all_list)

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