How and When to Use __str__
In this lesson, you’ll see one Pythonic way to convert Python objects into strings by using __str__. You’ll learn what __str__ means as well and also learn how to use it in a Python class:
class Car:
def __init__(self, color, mileage):
self.color = color
self.mileage = mileage
def __str__(self):
return 'a {self.color} car'.format(self=self)
Hector on Nov. 17, 2019
Perdon, but what does it mean ‘dunder’ in context of using it here? English is not my native. I found this…www.merriam-webster.com/dictionary/dunder
Dan Bader RP Team on Nov. 18, 2019
@Hector: dunder stands for double underscore in this context. More here in this tutorial: realpython.com/operator-function-overloading/
RMS on April 23, 2020
What about __mifflin__ ? 😃
Dan Bader RP Team on April 23, 2020
@RMS hahah nice, hadn’t heard that one before :D It’s a perfect combination. Corona quarantine, coding Python, and re-watching The Office…
Raiss Bahati on May 29, 2020
The format(self=self) part from the line of code below got me confused. What’s the logic behind it? For my part I prefer using f-strings for string formatting.
def str(self): return ‘a {self.color} car’.format(self=self)
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paulakula11 on Aug. 28, 2019
I just wanted to keep it the old fashion way: