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Introspection de Code
Code introspection est la capacité à examiner les classes, fonctions et mots-clés pour savoir ce qu'ils sont, ce qu'ils font et ce qu'ils connaissent.
Python fournit plusieurs fonctions et utilitaires pour l'introspection de code.
help()
dir()
hasattr()
id()
type()
repr()
callable()
issubclass()
isinstance()
__doc__
__name__
Souvent, la plus importante est la fonction help, car elle permet de découvrir ce que font les autres fonctions.
Exercice
Imprimez une liste de tous les attributs de l'objet Vehicle donné.
# Use the help function to see what each function does.
# Delete this when you are done.
help(dir)
help(hasattr)
help(id)
# Define the Vehicle class.
class Vehicle:
name = ""
kind = "car"
color = ""
value = 100.00
def description(self):
desc_str = "%s is a %s %s worth $%.2f." % (self.name, self.color, self.kind, self.value)
return desc_str
# Print a list of all attributes of the Vehicle class.
# Your code goes here
# Define the Vehicle class
class Vehicle:
name = ""
kind = "car"
color = ""
value = 100.00
def description(self):
desc_str = "%s is a %s %s worth $%.2f." % (self.name, self.color, self.kind, self.value)
return desc_str
# Print a list of all attributes of the Vehicle class.
print(dir(Vehicle))
test_output_contains("['__doc__', '__module__', 'color', 'description', 'kind', 'name', 'value']")
test_student_typed("print")
success_msg("Very nice!")
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