如何在最后一次出现时删除数组中的部分字符串

def remove_last_occurrence(arr, target):
    last_index = -1
    for i in range(len(arr)):
        if arr[i] == target:
            last_index = i

    if last_index != -1:
        before = arr[:last_index]
        after = arr[last_index+1:]
        arr = before + after

    return arr

# 示例用法
arr = ["apple", "banana", "orange", "banana", "grape"]
target = "banana"
result = remove_last_occurrence(arr, target)
print(result)