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This is my work

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#!usr/bin/env/bython3
#-*- coding:utf-8 -*-
len(L)
# 打印Apple:
print(L[0][0])
# 打印Python:
print(L[1][1])
# 打印Lisa:
print(L[2][2])

#本节学习记要:list[列表]、append【追加】、insert【插入】、pop()【删除】、tuple【元祖】 len()【查寻元素个数】

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