Return a string containing a printable representation of an object. For many types, this function makes an attempt to return a string that would yield an object with the same value when passed toeval(), otherwis
Return a string containing a printable representation of an object. For many types, this function makes an attempt to return a string that would yield an object with the same value when passed to eval(), otherwise the representation is a string enclosed in angle brackets that contains the name...
repr(object) Return a string containing a printable representation of an object. This is the same value yielded by conversions (reverse quotes). It is sometimes useful to be able to access this operation as an ordinary function. For many types, this function makes an attempt to return a stri...
所以round(0.5)会近似到1,而round(-0.5)会近似到-1 但是在python 3.5 中 round 值,如果距离两边一样远,会保留到偶数的一边。比如round(0.5)和round(-0.5)都会保留到0,而round(1.5)会保留到2 print("round(2.355,2):",round(2.355,2))#2.35 print(round(2.675,2)) #2.67 1. 2. 总之尽量避免使用 ro...
The function returns a string object. Examples 1. Printable Representation of Class In this example, we get the printable representation of a Python class and its object. Python Program </> Copy class A: name = 'Apple' print(repr(A)) ...
在CPython里,内存地址就是对象的标识。你可以使用 built-in function id() (内置函数id())来获取对象的标识,此时返回十进制数而不是十六进制数。 然而,内存地址鲜有用处。默认的表示形式并不提供任何对用户或程序员有帮助的额外对象信息。 repr() 和str() 都会返回这种默认的字符串表示: # book.py class ...
Python__repr__()function returns the object representation in string format. This method is called whenrepr()function is invoked on the object. If possible, the string returned should be a valid Python expression that can be used to reconstruct the object again. ...
and dictionaries, have the same representation using either function. Strings and floating point numbers, in particular, have two distinct representations.Some examples:>>> s = 'Hello, world.'>>> str(s)'Hello, world.'>>> repr(s)"'Hello, world.'">>> str(0.1)'0.1'>>> ...
a string containing a printable representation of an object. For many types, this function makes...
python内置函数大全 其他 最近一直在看python的document,打算在基础方面重点看一下python的keyword、Build-in Function、Build-in Constants、Build-in Types、Build-in Exception这四个方面,其实在看的时候发现整个《The Python Standard Library》章节都是很不错的,其中描述了很多不错的主题。先把Build-in Function罗列...