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Inspecting Object Properties with Built-In Functions
In the realm of object-oriented programming, debugging is often accompanied by the need to examine the properties and values of an object. In many languages, there exist built-in functions that facilitate this introspection.
The PHP print_r Function
One such useful feature in PHP is the print_r function. It recursively traverses an object's attributes, providing a readable representation of its properties and values in an array.
Emulating print_r in Python
While Python doesn't possess an exact equivalent to print_r, a combination of the vars() and pprint() functions can achieve similar functionality.
Using vars() and pprint()
The vars() function extracts the properties and values of an object into a dictionary. By calling pprint() on the result of vars(), you obtain a formatted, human-readable output.
Example:
from pprint import pprint class Person: def __init__(self, name, age): self.name = name self.age = age person = Person("John Doe", 30) pprint(vars(person))
Output:
{'age': 30, 'name': 'John Doe'}
This powerful combination allows you to delve into the inner workings of your objects, aiding in debugging and understanding their state.
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