The first possible case
list[index]index is out of range, which is often referred to as the array out of bounds
The
second possible case is that the list is empty without an element
list[index]index is out of range, which is often referred to as the array out of bounds
The
second possible case is that the list is empty without an element
This error will occur when list[0] is executed, which is very common in crawler problems. For example, if a list is crawled down and is empty, an error will be reported in unified processing.