zoukankan      html  css  js  c++  java
  • 内置函数(十)

    #!/usr/bin/python3
    
    print(ord('a'))    # 转数字
    
    print(pow(3, 3)) # 取次方
    print(pow(3, 3, 2))# 取次方再对2求余数
    
    '''
    97
    27
    1
    '''
    #!/usr/bin/python3
    
    str = 'hello'
    s1 = slice(2,4)
    s2 = slice(0,5,2) # z指定步长为2
    print(str[s1])
    print(str[s2])
    
    '''
    ll
    hlo
    '''

    http://www.runoob.com/python3/python3-built-in-functions.html

    str = '你好'
    print(bytes(str, encoding='utf-8')) # b'xe4xbdxa0xe5xa5xbd'
    print(bytes(str, encoding='utf-8').decode('utf-8')) # 你好
    print(bytes(str, encoding='gbk')) # b'xc4xe3xbaxc3'
    print(bytes(str, encoding='gbk').decode('gbk'))
    
    print(divmod(10, 3)) # (3, 1) 十除三,得三余一 可做分页功能
    
    str2 = "{'name': 'a'}" # 字符串里面有字典的串
    print(str2) # {'name': 'a'}
    print(eval(str2)) # {'name': 'a'} 将字典解析出来
    express = '1+3*2'
    print(eval(express)) # 7
    
    # 可hash的数据类型即不可变数据类型,不可hash的数据类型即可变数据类型
    name = 'hello'
    print(hash(name))  # 3576857839363168520
    print(hash(name))  # 3576857839363168520
    print(hash(name))  # 3576857839363168520
    
    print(bin(10)) # 0b1010
    print(hex(10)) # 0xa
    print(oct(10)) # 0o12
    abs()
    dict()
    help()
    min()
    setattr()
    all()
    dir()
    hex()
    next()
    slice()
    any()
    divmod()
    id()
    object()
    sorted()
    ascii()
    enumerate()
    input()
    oct()
    staticmethod()
    bin()
    eval()
    int()
    open()
    str()
    bool()
    exec()
    isinstance()
    ord()
    sum()
    bytearray()
    filter()
    issubclass()
    pow()
    super()
    bytes()
    float()
    iter()
    print()
    tuple()
    callable()
    format()
    len()
    property()
    type()
    chr()
    frozenset()
    list()
    range()
    vars()
    classmethod()
    getattr()
    locals()
    repr()
    zip()
    compile()
    globals()
    map()
    reversed()
    __import__()
    complex()
    hasattr()
    max()
    round()
     
    delattr()
    hash()
    memoryview()
    set()
  • 相关阅读:
    Jar包管理规范
    Base64编码原理与应用
    MySQL 5.7.14安装说明,解决服务无法启动
    idea注册
    Oracle 如何对中文字段进行排序
    SVN错误:Attempted to lock an already-locked dir
    排序算法
    设计模式
    分层
    阿里云
  • 原文地址:https://www.cnblogs.com/xiangtingshen/p/10390537.html
Copyright © 2011-2022 走看看