1、append:增加元素到列表尾部
L.append(object) -> None -- append object to end
2、clear:清空列表中所有元素
3、count:返回列表中指定值的数量
L.count(value) -> integer -- return number of occurrences of value
4、extend:用列表扩展列表的元素
#L.extend(iterable) -> None -- extend list by appending elements from the iterable l1 = [1,2,3] l2 = [3,4,5] l1.extend(l2) print(l1)
5、index:返回指定元素的索引位置
#L.index(value, [start, [stop]]) -> integer -- return first index of value lx = ['today','is','a','good','day'] print(lx.index('is')) 结果：1
6、insert:在指定索引位置插入
#L.insert(index, object) -- insert object before index lx = ['today','is','a','good','day'] lx.insert(2,'not') print(lx)
结果：['today', 'is', 'not', 'a', 'good', 'day']
7、pop：删除列表指定位置的元素，默认为最后一个元素
#L.pop([index]) -> item -- remove and return item at index (default last) lx = ['today','is','a','good','day'] lx.pop(2) print(lx) 结果：['today', 'is', 'good', 'day']
8、remove:删除列表中指定的元素
#L.remove(value) -> None -- remove first occurrence of value lx = ['today','is','a','good','day'] lx.remove('a') print(lx) 结果：['today', 'is', 'good', 'day']
9、reverse:将列表中所有元素反转
#L.reverse() -- reverse *IN PLACE* lx = ['today','is','a','good','day'] lx.reverse() print(lx) 结果：['day', 'good', 'a', 'is', 'today']
10、sort：排序
#原址排序 x= [3,2,4,6,5,7,9,8] x.sort() print(x) 结果：[2, 3, 4, 5, 6, 7, 8, 9] #需要一个排序好的副本，通过切片方法将x赋值给y x= [3,2,4,6,5,7,9,8] y = x[:] y.sort() print(x) print(y) 结果： [3, 2, 4, 6, 5, 7, 9, 8] [2, 3, 4, 5, 6, 7, 8, 9] #再一种通过sorted x= [3,2,4,6,5,7,9,8] y = sorted(x) print(x) print(y) 结果： [3, 2, 4, 6, 5, 7, 9, 8] [2, 3, 4, 5, 6, 7, 8, 9]
11、filter:使用一个自定义的涵数过滤一个序列，把函数的每一项传到自定义的函数里处理，最终一次性返回过滤的结果
def func(x): if x >33: return True li = [11,22,33,44,55] new_list = filter(func,li) print(list(new_list))
结果：[44,55]
12、zip:接受任意多个序列，返回一个元组
x = [1,2,3] y = [4,5,6] z = [7,8,9] zipped = zip(x,y,z) yy = list(zipped) xyz =zip(*yy) #zip的反函数 print(yy) print(list(xyz)) 结果： [(1, 4, 7), (2, 5, 8), (3, 6, 9)] [(1, 2, 3), (4, 5, 6), (7, 8, 9)]
13、tell：查看当前指针位置
seek：定位当前指针位置
'''test.llog 孔kongzhagen ''' f = open('test.log','r+',encoding='utf-8') f.read(2) print(f.tell()) #查看当前指针位置 f.seek(6) f.read(2) print(f.tell()) 结果：4,8
14、truncate: truncate(n): 从文件的首行首字符开始截断，截断文件为n个字符；无n表示从当前位置起截断；截断之后n后面的所有字符被删除。其中win下的换行代表2个字符大小。
''' # Assuming file has following 5 lines # This is 1st line # This is 2nd line # This is 3rd line # This is 4th line # This is 5th line ''' f = open("test.log","r+") print('Name of file %s'%f.name) line = f.readline() print('Read line:%s'%line) f.truncate(f.tell()) #文件保留了第一行，其余被截断 line = f.readline() print('Read line:%s'%line) f.close() 结果: Name of file test.log Read line:# Assuming file has following 5 lines Read line:# This is 1st line
其它
numList = [1,2,2,23,4,5] strList = ['a','b','c','d','e'] numList.append(6) # numList列表增加一个值 print numList print numList.count(2) # 列表中2出现的次数 numList.extend(strList) # strList的内容增加到numList后面 print numList print numList.index(23) # numList中23的索引位置 numList.insert(3,45) # 在numList的3索引位置添加45 print numList print numList.pop() # 获取并删除numList最后一个值 numList.remove(4) # 从numList中删除4 print numList numList.reverse() # 获取numList的反向列表 print numList