Is there a magic function which is used to parse raw string into object?

Asked Jul 25 '16 at 12:33

Active Jul 25 '16 at 12:41

Viewed 72 times

As we know, there are __str__ and __repr__ convert object into str, but is there any magic function that I can used to do the exact opposite thing? For example, I have

class Point(object):
    def __init__(self, x, y):
        self.x = x
        self.y = y

    def __str__(self):
        return '({}, {})'.format(self.x, self.y)

I can get (1, 2) if I call print(Point(1, 2)) and assume I saved it into a file. And now, if I want to recover it from the file. Is there any magic function that I can overload to parse the raw string into object? Just like what the << operator does in C++, and what the Read class does in Haskell.

Emm, I'm not sure if this just is what called serialization and deserialization.

UPDATE

I just want a magic function's name, which play the role of placeholder, when I want to parse a raw string into a object, I just come to this name. I'm not asking how to parse. So this is not duplicated with Convert strig to Python class object?.

edited May 23 '17 at 11:44

Community

asked Jul 25 '16 at 12:33

speedcell4

yes, it is serialization and deserialization – pwnsauce Jul 25 '16 at 12:35
look at `json.dumps()` to write it to a file, then `json.load()` to recreat your object. – pwnsauce Jul 25 '16 at 13:26

Is there a magic function which is used to parse raw string into object?

0 Answers0