tuple built-in function tuple tips: 1.对于Python中的tuple类型来说,他与其它的序列类型来讲最大的不同就是tuple是不可变的。 2.当你需要创建一个只有一个元素的tuple时,需要在元祖分隔符里面加一个逗号(,) 3.tuple只有两个built-in function,一个是count,一个是index。作用和列表类似。这里就不一一赘述了 ...
相当于x**yprint(pow(2, 8)) # 256print(bin(2)) # 转为二进制 0b10print(oct(12)) # 转8进制 0o14print(hex(20)) # 转16进制 0x14print(bool(1)) # 转为布尔值 True# 转为ints = "12"i = int
中函数的参数,虽然在函数定义的时候无法指定对象的类型,但是调用该函数的时候,也并不是什么对象都可以传入的,比如我们查看sum的帮助文档,其描述了可接受的第一个参数是可迭代对象(包括迭代器,list,tuple...,第二个参数start,默认值为0,这个参数需要是一个数字;所
【摘要】 Built-in Functions(68个) 1、数学方法 abs() sum() pow() min() max() divmod() round() 2、进制转换 bin() oct() hex() 3、简单数据类型 - 整数:int() - 浮点数:float() - 字符\字符串:str() repr() ascii() ord() chr()... Built-in Functions(68个) 1、数学方法 abs(...
一,函数的文档: zip(): Make an iterator that aggregates elements from each of the iterables. Returns an iterator of tuples, where the i-th tuple contains the
enumerate()Takes a collection (e.g. a tuple) and returns it as an enumerate object eval()Evaluates and executes an expression exec()Executes the specified code (or object) filter()Use a filter function to exclude items in an iterable object ...
10 between, in, rlike, regexp, ilike, like, is [not] [NULL, true, false], is [not] distinct from 11 and 12 or String and binary functions Expand table FunctionDescription expr1 || expr2 Returns the concatenation of expr1 and expr2. aes_decrypt(expr, key[, mode[, padding...
Help on built-in function divmod in module builtins: divmod(...) divmod(x, y) -> (div, mod) Return the tuple ((x-x%y)/y, x%y). Invariant: div*y + mod == x. """ # 对象id a = 1 print(id(a)) # 1430299072 # 打印局部变量 ...
This function is similar to the exec statement, but parses a file instead of a string. It is different from the import statement in that it does not use the module administration — it reads the file unconditionally and does not create a new module. [1]The arguments are a file name and...
Built-in FunctionsThe Python interpreter has a number of functions and types built into it that are always available. They are listed here in alphabetical order. Name Description abs() The abs() function is used to get the absolute (positive) value of a given number. all() The all() ...