<function func at 0x0000002D3656D6A8> >>> func(5) 5 >>> 1.3. complie函数 compile(source, filename, mode, flags=0, dont_inherit=False, optimize=-1) Compile the source into a code or AST object. Code objects can be executed by exec() or eval(). source can either be a normal s...
<function func at 0x0000002D3656D6A8> >>> func(5) 5 >>> 1.3. complie函数 compile(source, filename, mode, flags=0, dont_inherit=False, optimize=-1) Compile the source into a code or AST object. Code objects can be executed by exec() or eval(). source can either be a normal s...
1.使用eval获取用户输入的内容通常来讲,当我们不知道用户会输入那种类型的时候会使用eval()来对输入的数据进行一个类型识别、自动转换【我之前都是这么干的】例如:varDemo = eval(input('请输入数据:'))# 进行一些操作如果当用户输入的是int或者str、float等数据,会自动将输入的数据转为对应的数据【当然输入字符...
make eval builtin function 1 eval的返回值是空字符串,因此它可以用于Makefile的任何位置而不引起错误 2 eval函数的作用效果 生成Makefile的动态部分,即eval用于增加Makefile的构成部分。 也就是说,经过eval扩展之后的text部分,完全可以看成是Makefile的一部分,在make的时候,由make自己去解析执行,执行的过程完全等同...
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 float()Returns a floating point number format()Formats a specified value frozenset()Returns a frozenset object ...
5、面向对象 setattr() getattr() delattr() hasattr() super() property() staticmethod() classmethod() isinstance() issubclass() 6、系统方法 dir() help() id() object() type() input() open() print() eval() exec() compile() vars() locals() globals() ...
eval(exp, [globals],[locals]) 接收的exp为Unicode或Latin1的str,也可执行code object exec execfile(filename[, globals[, locals]]) file(name[, mode[, buffering]]) filter(function, iterable) 返回iterable中元素传递到function中为真的元素列表 ...
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 1print(divmod(5,2))# 取商和余数 (2, 1)# 四舍五入print(round(1.4))# 1print(round(1.5))# 2print(round(1.6))# 2# 次...
Function 函数实例化方法 varfun=Function("a","return a")/** 他等价于 function fun(a){ return a } **/console.log(fun("hello world"))// 结果: hello world eval 将字符串当作js去执行 eval('debugger;console.log("hello world")')// 结果:hello world ...
The dir function is a built-in function: it lives in the built-in namespace. Applying the LGB rule means that the function is always available, and that no import statement is needed to access it.[54] You’ve already encountered many of the built-in functions, such as len, open, type...