Whats the difference between repr and str?

Following are differences: str() is used for creating output for end user while repr() is mainly used for debugging and development. repr’s goal is to be unambiguous and str’s is to be readable. For example, if we suspect a float has a small rounding error, repr will show us while str may not.

Does print call repr or str?

If you print an object, or pass it to format , str. format , or str , then if a __str__ method is defined, that method will be called, otherwise, __repr__ will be used.

What is repr for?

The repr() method returns a string containing a printable representation of an object.

What is __ repr __ Python?

In Python, __repr__ is a special method used to represent a class’s objects as a string. According to the official documentation, __repr__ is used to compute the “official” string representation of an object and is typically used for debugging.

What is def __ str __( self in Django?

def str(self): is a python method which is called when we use print/str to convert object into a string. It is predefined , however can be customised. Will see step by step.

How do you call the __ str __ method?

Python __str__() This method is called when print() or str() function is invoked on an object. This method must return the String object. If we don’t implement __str__() function for a class, then built-in object implementation is used that actually calls __repr__() function.

What should __ repr __ return?

__repr__ should return a printable representation of the object, most likely one of the ways possible to create this object. See official documentation here. __repr__ is more for developers while __str__ is for end users.

What does __ repr __ return?

What does the repr() function do in Python Object Oriented Programming? The official Python documentation says __repr__() is used to compute the “official” string representation of an object. __repr__() returns a printable representation of the object, one of the ways possible to create this object.

Why is eval not safe?

Any code that is evil in EVAL, is evil in the browser itself. The attacker or anyone can easily inject a script node in DOM and do anything if he/she can eval anything. Not using EVAL will not make any difference. It is mostly poor server-side security that is harmful.