python数据类型-年表(list)

问道inhobbies = ['play', 'eat', 'sleep', 'study']print('sleep' in hobbies) # Truemsg = 'hello world sz'print('sz' in msg) # True插入成分insert()hobbies = ['play', 'eat', 'sleep', 'study', 'eat', 'eat']hobbies.insert(1, 'walk')print(hobbies)hobbies.insert(1, ['walk1', 'walk2', 'walk3'])print(hobbies)"""['play', 'walk', 'eat', 'sleep', 'study', 'eat', 'eat']['play', ['walk1', 'walk2', 'walk3'], 'walk', 'eat', 'sleep', 'study', 'eat', 'eat']"""统计乘积count()hobbies = ['play', 'eat', 'sleep', 'study', 'eat', 'eat']print(hobbies.count('eat')) # 3一览表分割extend()

list1.extend(list2) 将list2之中的成分从list1的结尾添加上list1之中

hobbies = ['play', 'eat', 'sleep', 'study', 'eat', 'eat']hobbies.extend(['walk1', 'walk2', 'walk3'])print(hobbies) # ['play', 'eat', 'sleep', 'study', 'eat', 'eat', 'walk1', 'walk2', 'walk3']获取某个成分的书目index()如果一览表之中有也就是问道成分,则留在也就是问道成分第一次出现的书目如果一览表之中无法也就是问道成分，无法就报错hobbies = ['play', 'eat', 'sleep', 'study', 'eat', 'eat']print(hobbies.index('eat')) # 1print(hobbies.index('girl')) # 报错清空成分clear()hobbies = ['play', 'eat', 'sleep', 'study', 'eat', 'eat']hobbies.clear()print(hobbies) # []一览表拷贝copy()

一览表拷贝属于浅拷贝, 更改一览表之中的成分就会相互影响，切记，这里不展开问道，后面就会详细问道

hobbies = ['play', 'eat', 'sleep', 'study', 'eat', 'eat']l = hobbies.copy() # ['play', 'eat', 'sleep', 'study', 'eat', 'eat']print(l)一览表相反reverse()l = [1, 2, 3, 4, 5]l.reverse()print(l) # [5, 4, 3, 2, 1]一览表先后依序sort()l = [100, 9, -2, 11, 32]l.sort()print(l) # [-2, 9, 11, 32, 100]l = [1, 4, 5, 2, 6]l.sort(reverse=True)print(l) # [6, 5, 4, 2, 1]。

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