Python实战之列表简单练习

['__add__', '__class__', '__contains__', '__delattr__', '__delitem__', '__dir__', '__doc__', '__eq__',
'__format__', '__ge__', '__getattribute__', '__getitem__', '__gt__', '__hash__', '__iadd__', '__imul__',
 '__init__', '__iter__', '__le__', '__len__', '__lt__', '__mul__', '__ne__', '__new__', '__reduce__',
 '__reduce_ex__', '__repr__', '__reversed__', '__rmul__', '__setattr__', '__setitem__', '__sizeof__',
 '__str__', '__subclasshook__', 'append', 'clear', 'copy', 'count', 'extend', 'index', 'insert', 'pop', 'remove', 'reverse', 'sort']

names = ['jone','','xiaoming','zhangsan','lisi','wangermazi','william']
print(names)
#打印整个列表
#['jone', '1', 'xiaoming', 'zhangsan', 'lisi', 'wangermazi', 'william']

print("names[0]:",names[0])
print("names[-1]:",names[-1])
# 按列表下表取值，从最后往前数，分别是-1，-2...
# names[0]: jone
# names[-1]: william

print(names[1:4])
print(names[0:7:3])
# 列表切片，取多个元素，注意顾头不顾尾。其中3是步长。
# ['1', 'xiaoming', 'zhangsan']
# ['jone', 'zhangsan', 'william']

names.append("xiaotaoqi")
print(names)
# ['jone', '1', 'xiaoming', 'zhangsan', 'lisi', 'wangermazi', 'william', 'xiaotaoqi']
# append 追加到列表最后面，与insert对比学习.

names = ['jone','','xiaoming','zhangsan','lisi','wangermazi','william']
names.insert(0,'xiaoshagua')
print(names)
# ['xiaoshagua', 'jone', '1', 'xiaoming', 'zhangsan', 'lisi', 'wangermazi', 'william']
names.insert(3,'')
print(names)
# ['xiaoshagua', 'jone', '1', '123', 'xiaoming', 'zhangsan', 'lisi', 'wangermazi', 'william']
names.insert(-1,'ershagua')
print(names)
# ['xiaoshagua', 'jone', '1', 'xiaoming', 'zhangsan', 'lisi', 'wangermazi', 'ershagua', 'william']

names = ['jone','','xiaoming','zhangsan','lisi','wangermazi','william']
names[0] = 'new_jone'
print(names)
# 修改单个值
# ['new_jone', '1', 'xiaoming', 'zhangsan', 'lisi', 'wangermazi', 'william']

names = ['jone','william','xiaoming','zhangsan','lisi','wangermazi','william']
names.sort()
print(names)
# 排序
# ['jone', 'lisi', 'wangermazi', 'william', 'william', 'xiaoming', 'zhangsan']

names.reverse()
print(names)
#反转
# ['zhangsan', 'xiaoming', 'william', 'william', 'wangermazi', 'lisi', 'jone']

names = ['jone','william','xiaoming','zhangsan','lisi','wangermazi','william']
print(names.index("lisi"))
#获取下标，index
#

#删除三法：pop,remove,del
names = ['jone','','xiaoming','zhangsan','lisi','wangermazi','william']
print(names)
# ['jone', '1', 'xiaoming', 'zhangsan', 'lisi', 'wangermazi', 'william']
del names[2]
print(names)
# ['jone', '1', 'zhangsan', 'lisi', 'wangermazi', 'william']

names.remove('lisi')
print(names)
# ['jone', '1', 'zhangsan', 'wangermazi', 'william']

names.pop()
print(names)
# ['jone', '1', 'zhangsan', 'wangermazi']

names.pop(2)
print(names)
# ['jone', '1', 'wangermazi']

names = ['jone','','xiaoming','zhangsan','lisi','wangermazi','william']
names2 = ['xiaotaoqi','ershan']
names.extend(names2)
print(names)
#拓展
# ['jone', '1', 'xiaoming', 'zhangsan', 'lisi', 'wangermazi', 'william', 'xiaotaoqi', 'ershan']

names = ['jone','william','','xiaoming','zhangsan','lisi','wangermazi','william']
#统计某个元素出现的个数
print(names.count('william'))
#

names = ['jone','','xiaoming','zhangsan','lisi','wangermazi','william']
#copy
new_names = names.copy()
print(names)
# ['jone', '1', 'xiaoming', 'zhangsan', 'lisi', 'wangermazi', 'william']
print(new_names)
# ['jone', '1', 'xiaoming', 'zhangsan', 'lisi', 'wangermazi', 'william']
print(names==new_names)
# True