#######################list 类 列表########################
li = [1, 2, 343, 'dfas', ['fsad', 'dfas'], True]
# list 是一个集合 能放任何东西进去
# print(li[0:3])
# list 是可以修改的
# 索引法
# li[1]
# a = li[4][0] value = 'fsad'
# 切片法
# li[3:5] = [3223,3432]
# 列表中的元素是以，分割 一个一个是整体
# li[1] = 'fdasdf'
# print(li)
# in 操作
# for 循环 while循环
tuple
# 删除
# del li[1]
list
#####转换
# 字符串转化为列表 li = list['dfsadfasdf']
#若列表里只有字符串
'''li = ['dfas','fdsaf']
v = "".join(li)
print(v)
'''
#列表里不只有字符串 可以使用for循环
'''
s = ""
for itm in li:
s = s + str(itm)
print(itm)
'''
# list类中提供的方法
'''
l、li.append(self, p_object): # real signature unknown; restored from __doc__
""" L.append(object) -> None -- append object to end """
v = li.append(5) 原值最后追加 v的value 位none
li.append(['',''])
2、清空列表
li.clear()
3、拷贝
count(self, value): # real signature unknown; restored from __doc__
L.count(value) -> integer -- return number of occurrences of value
4、计数
count(self, value): # real signature unknown; restored from __doc__
L.count(value) -> integer -- return number of occurrences of value
5、扩展原列表 参数为可迭代对象：字符串、列表框、元组 注意和append的区别
extend(self, iterable): # real signature unknown; restored from __doc__
L.extend(iterable) -> None -- extend list by appending elements from the iterable
li = [112,232,3213,3]
li.append([213,3213])
print(li)
[112,232,3213,3,[213,3213]]
li = [112,232,3213,3]
li.extend([213,3213])
print(li)
[112,232,3213,3,213,3213]
6、根据索引值获取位置 index
index(self, value, start=None, stop=None): # real signature unknown; restored from __doc__
L.index(value, [start, [stop]]) -> integer -- return first index of value.
Raises ValueError if the value is not present.
7、在指定索引位置插值 insert
insert(self, index, p_object): # real signature unknown; restored from __doc__
L.insert(index, object) -- insert object before index
8、删除索引对应的值 不指定索引默认最后一个值 并获取删除值
pop(self, index=None): # real signature unknown; restored from __doc__
L.pop([index]) -> item -- remove and return item at index (default last).
Raises IndexError if list is empty or index is out of range.
li = [112,232,3213,3]
v = li.[1]
print(v,li)
232
[112,3213,3]
9、选择删除值 remove
remove(self, value): # real signature unknown; restored from __doc__
"""
L.remove(value) -> None -- remove first occurrence of value.
Raises ValueError if the value is not present.
"""
# pop remove del li[0] del li[1:2]
10、反转 reverse
reverse(self): # real signature unknown; restored from __doc__
""" L.reverse() -- reverse *IN PLACE* """
11、排序 sort
sort(self, key=None, reverse=False): # real signature unknown; restored from __doc__
""" L.sort(key=None, reverse=False) -> None -- stable sort *IN PLACE* """
reverse = False 从小到大排序
#list 有序且可以被修改
'''
dict
###########################元组tuple#########################
'''
元组一旦被创建 一级元素不可修改、不能被增加和删除 嵌套的列表框可以修改
tuple 是有序的
可以进行索引
可以进行切片
可以进行for 循环 while循环
最好创建的时候加一个小逗号 tup = (fasdf,fdsfdfd,)
tu = (dfas,erw,rewr,[(33,44)],4234) #获取33
v = tu[3][0][0]
print(v)
33
b = tu[3][0] =234
print(b)
tu = (dfas,erw,rewr,[234],4234)
#############list方法
1、计数 count
count(self, value): # real signature unknown; restored from __doc__
""" T.count(value) -> integer -- return number of occurrences of value """
return 0
2、找寻 index
index(self, value, start=None, stop=None): # real signature unknown; restored from __doc__
"""
T.index(value, [start, [stop]]) -> integer -- return first index of value.
Raises ValueError if the value is not present.
"""
'''
############################字典 #############
'''
info = {"k1":v1,"k2":"v2"} #"k1":"v1" 键值对
key:value value 可以为任意值
key : 数字、字符串、元组 都可以 列表不可以 哈希表
#索引使用key值 自己申明的
#无序状态无法切片
#删除
del info[key]
# for 循环 默认只循环key
for item in info.keys
for item in info.values
for item in info .items 键值对
####or for item in info.keys
print(item,info[item])
True 1 False 0 作为key 可能与1 重复
'''
####################dict 常用方法
'''
1、dict()
2、clear(self): # real signature unknown; restored from __doc__
""" D.clear() -> None. Remove all items from D. """
pass
3、 copy(self): # real signature unknown; restored from __doc__
""" D.copy() -> a shallow copy of D """
pass
4、@staticmethod # known case直接写个类名就可以了 静态方法
fromkeys(*args, **kwargs): # real signature unknown 第一个参数为key 第二个参数为value
""" Returns a new dict with keys from iterable and values equal to value. """ 创建字典，指定统一的值
pass
####5、get(self, k, d=None): # real signature unknown; restored from __doc__
""" D.get(k[,d]) -> D[k] if k in D, else d. d defaults to None. """
根据key取value值 key不存在时返回d值 d默认值为none
6、pop(self, k, d=None): # real signature unknown; restored from __doc__
"""
D.pop(k[,d]) -> v, remove specified key and return the corresponding value.
If key is not found, d is returned if given, otherwise KeyError is raised
删除值 若key值不存在返回d
7、popitem(self): # real signature unknown; restored from __doc__
"""
D.popitem() -> (k, v), remove and return some (key, value) pair as a
2-tuple; but raise KeyError if D is empty.
"""随机删除一对键值对
8、setdefault(self, k, d=None): # real signature unknown; restored from __doc__
""" D.setdefault(k[,d]) -> D.get(k,d), also set D[k]=d if k not in D """
设置值：如果已经存在的key 不设置 获取原对应的value
若不存在 设置该value
9、update(self, E=None, **F): # known special case of dict.update
"""
D.update([E, ]**F) -> None. Update D from dict/iterable E and F.
If E is present and has a .keys() method, then does: for k in E: D[k] = E[k]
If E is present and lacks a .keys() method, then does: for k, v in E: D[k] = v
In either case, this is followed by: for k in F: D[k] = F[k]
"""
已经存在 覆盖掉
不存在 赋值
dic.update(k1=123,k3=234,k5="dfas") 自动转换成字典
'''
###############################大整理#####################
'''
#数字
int
#字符串
replace
find
join
strip
startwith
endwith
upper
lower
format 特殊的 v = template.format(**{name:'fdsa',age:'fdasf'})
#列表
append
extend
insert
索引、切片、循环
#元组 忽略
#字典
get
update
keys
values
items
for
索引
#布尔值
0 1
bool()
为假的:none () 0 '' [] {}
'''
