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.

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.

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 that there is one …

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 library: After …

__str__ and __repr__ are both methods for getting a string representation of an object. __str__ is supposed to be shorter and more user-friendly, while __repr__ is supposed to provide more detail. …

Mar 12, 2013 · Python 3 solves this by making print a function, so no obstacles remain for a new repr on classes (although eval probably works even in Python 2 ;)

For types that have a literal notation (str, int, float, list, etc.) the repr() returns a string that can be used to create the type again. That is nice, but not a requirement. The main purpose for __repr__ is to …

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

May 21, 2025 · 9 I'm trying to understand the difference between these three representations. So far I've figured out how #[repr(Rust)] and #[repr(C)] differ: #[repr(Rust)] is a default behavior while initializing, …