【Python】【Basic】【数据类型】基本数据类型
2024-10-19 12:24:56
1、数字
int(整型)
在32位机器上,整数的位数为32位,取值范围为-2**31~2**31-1,即-2147483648~2147483647
在64位系统上,整数的位数为64位,取值范围为-2**63~2**63-1,即-9223372036854775808~9223372036854775807
在64位系统上,整数的位数为64位,取值范围为-2**63~2**63-1,即-9223372036854775808~9223372036854775807
int
2、布尔值
真或假
1 或 0
3、字符串
"hello world"
字符串常用功能:
- 移除空白
- 分割
- 长度
- 索引
- 切片
str
%Y Year with century as a decimal number.
%m Month as a decimal number [01,12].
%d Day of the month as a decimal number [01,31].
%H Hour (24-hour clock) as a decimal number [00,23].
%M Minute as a decimal number [00,59].
%S Second as a decimal number [00,61].
%z Time zone offset from UTC.
%a Locale's abbreviated weekday name.
%A Locale's full weekday name.
%b Locale's abbreviated month name.
%B Locale's full month name.
%c Locale's appropriate date and time representation.
%I Hour (12-hour clock) as a decimal number [01,12].
%p Locale's equivalent of either AM or PM.
字符串格式化占位符
4、列表
创建列表:
ame_list
=
[
'alex'
,
'seven'
,
'eric'
]
或
name_list =
list
([
'alex'
,
'seven'
,
'eric'
])
基本操作:
- 索引
- 切片
- 追加
- 删除
- 长度
- 切片
- 循环
- 包含
list
5、元祖
创建元祖:
ages
=
(
11
,
22
,
33
,
44
,
55
)
或
ages
=
tuple
((
11
,
22
,
33
,
44
,
55
))
基本操作:
- 索引
- 切片
- 循环
- 长度
- 包含
tuple
6、字典(无序)
创建字典:
person
=
{
"name"
:
"mr.wu"
,
'age'
:
18
}
或
person
=
dict
({
"name"
:
"mr.wu"
,
'age'
:
18
})
常用操作:
- 索引
- 新增
- 删除
- 键、值、键值对
- 循环
- 长度
dict
7. set
set集合,是一个无序且不重复的元素集合
class set(object):
"""
set() -> new empty set object
set(iterable) -> new set object Build an unordered collection of unique elements.
"""
def add(self, *args, **kwargs): # real signature unknown
"""
Add an element to a set,添加元素 This has no effect if the element is already present.
"""
pass def clear(self, *args, **kwargs): # real signature unknown
""" Remove all elements from this set. 清除内容"""
pass def copy(self, *args, **kwargs): # real signature unknown
""" Return a shallow copy of a set. 浅拷贝 """
pass def difference(self, *args, **kwargs): # real signature unknown
"""
Return the difference of two or more sets as a new set. A中存在,B中不存在 (i.e. all elements that are in this set but not the others.)
"""
pass def difference_update(self, *args, **kwargs): # real signature unknown
""" Remove all elements of another set from this set. 从当前集合中删除和B中相同的元素"""
pass def discard(self, *args, **kwargs): # real signature unknown
"""
Remove an element from a set if it is a member. If the element is not a member, do nothing. 移除指定元素,不存在不保错
"""
pass def intersection(self, *args, **kwargs): # real signature unknown
"""
Return the intersection of two sets as a new set. 交集 (i.e. all elements that are in both sets.)
"""
pass def intersection_update(self, *args, **kwargs): # real signature unknown
""" Update a set with the intersection of itself and another. 取交集并更更新到A中 """
pass def isdisjoint(self, *args, **kwargs): # real signature unknown
""" Return True if two sets have a null intersection. 如果没有交集,返回True,否则返回False"""
pass def issubset(self, *args, **kwargs): # real signature unknown
""" Report whether another set contains this set. 是否是子序列"""
pass def issuperset(self, *args, **kwargs): # real signature unknown
""" Report whether this set contains another set. 是否是父序列"""
pass def pop(self, *args, **kwargs): # real signature unknown
"""
Remove and return an arbitrary set element.
Raises KeyError if the set is empty. 移除元素
"""
pass def remove(self, *args, **kwargs): # real signature unknown
"""
Remove an element from a set; it must be a member. If the element is not a member, raise a KeyError. 移除指定元素,不存在保错
"""
pass def symmetric_difference(self, *args, **kwargs): # real signature unknown
"""
Return the symmetric difference of two sets as a new set. 对称差集 (i.e. all elements that are in exactly one of the sets.)
"""
pass def symmetric_difference_update(self, *args, **kwargs): # real signature unknown
""" Update a set with the symmetric difference of itself and another. 对称差集,并更新到a中 """
pass def union(self, *args, **kwargs): # real signature unknown
"""
Return the union of sets as a new set. 并集 (i.e. all elements that are in either set.)
"""
pass def update(self, *args, **kwargs): # real signature unknown
""" Update a set with the union of itself and others. 更新 """
pass
set
set
set集合,是一个无序且不重复的元素集合
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|
class set ( object ): """ set() -> new empty set object set(iterable) -> new set object Build an unordered collection of unique elements. """ def add( self , * args, * * kwargs): # real signature unknown """ Add an element to a set,添加元素 This has no effect if the element is already present. """ pass def clear( self , * args, * * kwargs): # real signature unknown """ Remove all elements from this set. 清除内容""" pass def copy( self , * args, * * kwargs): # real signature unknown """ Return a shallow copy of a set. 浅拷贝 """ pass def difference( self , * args, * * kwargs): # real signature unknown """ Return the difference of two or more sets as a new set. A中存在,B中不存在 (i.e. all elements that are in this set but not the others.) """ pass def difference_update( self , * args, * * kwargs): # real signature unknown """ Remove all elements of another set from this set. 从当前集合中删除和B中相同的元素""" pass def discard( self , * args, * * kwargs): # real signature unknown """ Remove an element from a set if it is a member. If the element is not a member, do nothing. 移除指定元素,不存在不保错 """ pass def intersection( self , * args, * * kwargs): # real signature unknown """ Return the intersection of two sets as a new set. 交集 (i.e. all elements that are in both sets.) """ pass def intersection_update( self , * args, * * kwargs): # real signature unknown """ Update a set with the intersection of itself and another. 取交集并更更新到A中 """ pass def isdisjoint( self , * args, * * kwargs): # real signature unknown """ Return True if two sets have a null intersection. 如果没有交集,返回True,否则返回False""" pass def issubset( self , * args, * * kwargs): # real signature unknown """ Report whether another set contains this set. 是否是子序列""" pass def issuperset( self , * args, * * kwargs): # real signature unknown """ Report whether this set contains another set. 是否是父序列""" pass def pop( self , * args, * * kwargs): # real signature unknown """ Remove and return an arbitrary set element. Raises KeyError if the set is empty. 移除元素 """ pass def remove( self , * args, * * kwargs): # real signature unknown """ Remove an element from a set; it must be a member. If the element is not a member, raise a KeyError. 移除指定元素,不存在保错 """ pass def symmetric_difference( self , * args, * * kwargs): # real signature unknown """ Return the symmetric difference of two sets as a new set. 对称差集 (i.e. all elements that are in exactly one of the sets.) """ pass def symmetric_difference_update( self , * args, * * kwargs): # real signature unknown """ Update a set with the symmetric difference of itself and another. 对称差集,并更新到a中 """ pass def union( self , * args, * * kwargs): # real signature unknown """ Return the union of sets as a new set. 并集 (i.e. all elements that are in either set.) """ pass def update( self , * args, * * kwargs): # real signature unknown """ Update a set with the union of itself and others. 更新 """ pass |
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