List的赋值：
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"""s[i:j] = tslice of s from i to j is replaced by the contents of the iterable t"""li =
["a",2,True,"b"]
li[4:5] =
["c",False,3] #批量赋值，超过范围自动扩展List大小
print
li
>>[‘a‘, 2, True, ‘b‘, ‘c‘, False, 3]
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List的索引：
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li =
["a","b","c","d","e"]
print
li[1] #返回索引值为1的项
>>"b"
print
type(li[2]) #返回的类型为str型<br>>><type ‘str‘>
print
li[-4] #任何一个非空的list最后一个元素总是li[-1]<br>>>"b"
print
li[1:2]#分片返回索引值从1到1的值<br>>>[‘b‘]
print
type(li[1:2])<br>>><type
‘list‘> #返回的类型为List类型
print
li[:2]#slice简写，当左侧分片索引为空时默认为0
>>[‘a‘, ‘b‘]
print
li[1:] #简写，当右侧分片索引为空时，默认为list的长度<br>>>[‘b‘, ‘c‘, ‘d‘, ‘e‘]
print
li[:] #等于 print li[0:len(li)]<br>>>[‘a‘,‘b‘, ‘c‘, ‘d‘, ‘e‘]
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List中添加元素：
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li =
["a","b","c","d","e"]
li.append("f")
print
li
>>[‘a‘, ‘b‘, ‘c‘, ‘d‘, ‘e‘, ‘f‘]
li.insert(2,"1")
print
li
>>[‘a‘, ‘b‘, ‘1‘, ‘c‘, ‘d‘, ‘e‘, ‘f‘]
li.extend(["g","h"])
print
li
>>[‘a‘, ‘b‘, ‘1‘, ‘c‘, ‘d‘, ‘e‘, ‘f‘, ‘g‘, ‘h‘]
#append与extend的区别li =
["a","b","c","d","e"]
li.extend(["f","g"])
print
li
>>[‘a‘, ‘b‘, ‘c‘, ‘d‘, ‘e‘, ‘f‘, ‘g‘, ‘h‘]
li.append(["f","g"])
print
li
>>[‘a‘, ‘b‘, ‘c‘, ‘d‘, ‘e‘, ‘f‘, [‘f‘,‘g‘]]
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List中搜索：
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"""s.index(x[, i[, j]])return smallest k such that s[k] == x and i <= k < j""""""返回值li[i]到li[j]之间值等于x的最小k值"""li =
["a",2,True,"b",2]
print
li.index(2)
>>0
print
li.index(2,2)
>>4
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Count函数：
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"""s.count(x)return number of i‘s for which s[i] == x""""""返回x值在List中出现的次数"""li =
["a",2,True,"b",2]
print
li.count(True)
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pop函数：
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"""s.pop([i])same as x = s[i]; del s[i]; return x""""""s.pop(i)删除s中s[i],并返回该值"""li =
["a",2,True,"b",2]
print
li.pop(4)
print
li
print
li.pop()
print
li
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从List中删除元素：