The returns of repr() and str() are identical for int x, but there's a difference between the return values for str y -- one is formal and the other is informal.

return f"{self.__class__!s}({self.__dict__!r})" would have been too dangerous (for example, too easy to get into infinite recursion if objects reference each other). So Python cops out. Note …

The idea of repr is to give a string which contains a series of symbols which we can type in the interpreter and get the same value which was sent as an argument to repr.

In short repr should return a string that can be copy-pasted to rebuilt the exact state of the object, whereas str is useful for logging and observing debugging results.

Feb 7, 2012 · If anyone, after reading those 2 answers here, is still wondering what to use !r or repr for, I'd like to shed some light on my own observation of our huge corporate shared …

Called by the repr () built-in function and by string conversions (reverse quotes) to compute the “official” string representation of an object. If at all possible, this should look like a valid Python …

Apr 30, 2021 · Suppose I have a dataclass with a set method. How do I extend the repr method so that it also updates whenever the set method is called: from dataclasses import dataclass …

Jun 13, 2016 · Ещё раз: потребитель repr() —программист Питона, который видит это представление в REPL или debugger.

I get what the new f strings in python 3.6 do, but what about the ending !r as found in the code snip below.

Jun 3, 2017 · Well the __repr__ has a special meaning in Pythons data model: object.__repr__(self) Called by the repr() built-in function to compute the “official” string …