# 3.常用操作类的 # range() len() iter() next() enumerate() id() type() print() input() open() # 4.原义字符串 print(r'a\nb') print(ascii('a\nb')) print(repr('a\nb')) # a\nb # 'a\nb' # 'a\nb' # 5.数学相关运算 abs() sum() max() min() pow() sorted(...
1 """ 2 内置函数 Built-in Function 3 """ 4 5 # abs() 取绝对值 6 print(abs(-1)) 7 8 # all() 序列中每个元素进行bool运算 包含空以及0为 False 9 """ 10 Return True if bool(x) is True for all values x in the iterable. 11 If the iterable is empty, return True. 12 "...
其次还有 __builtins__ 这个字典会被自动注入到exec 的globals里面,前提是在语句中提供globals, 可以是空的,也可以是带参数的。 exec "print globals()" in {'s':'s'} exec "print locals()" in {} 1. 2. 上面的2个语句执行结果完全一样. 关于globals和locals的副作用,在执行的语句是付值语句或者是...
__repr__和 __str__ 虽然都是用于输出调用函数，但在print直接输出相应对象时，默认会查找是否存在 __str__ 然后 才是 __repr__。他们的区别也是内置函数 repr 和 str 的区别，repr调用的是解释器内部字符串形式，如果是byte字符类似于 \x0A (\x开头)，unicode字符则类似于 \u52A1 （\u字符...
input() open() print() eval() exec() compile() vars() locals() globals() callable() __import__() 参考:https://docs.python.org/3.5/library/functions.html print(abs(-1)) # 绝对值 1 print(divmod(5, 2)) # 取商和余数 (2, 1) ...
Python has a set of built-in functions. FunctionDescription abs()Returns the absolute value of a number all()Returns True if all items in an iterable object are true any()Returns True if any item in an iterable object is true ascii()Returns a readable version of an object. Replaces none...
value in enumerate(range(1,5)):print(index, value)"""0 11 22 33 4"""print(all([1,2,3])) # 所有都是真的 Trueprint(all([1,2,0])) # Falseprint(any([1,2,1])) # 至少存在一个真的 Trueprint(any([0])) # False# 元组t1 = ()t2 = (1,)t3 = tuple()print(type(t1)) ...
The @staticmethod form is a function decorator – see the description of function definitions in Function definitions for details. It can be called either on the class (such as C.f()) or on an instance (such as C().f()). The instance is ignored except for its class. ...
Printy is alightandcross-platformlibrary that extends the functionalities of the built-in functionsprint()andinput(). Printy stands out for its simplicity and for being and easy to use library, it lets you colorize and apply some standard formats to your text with an intuitive and friendly API...
map(function, iterable, ...) 参数: function:函数 iterable:可迭代的 返回值: Python 2.x 返回列表。 Python 3.x 返回迭代器。 示例 iter1 = map(lambda x: x * 2, [1, 2, 3]) # 对序列每个元素乘以2 print(iter1) # print(next(iter1)) # 2 # 对两个序列相同位置的元素相乘 def squar...