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Kodintrospektion
Kodinspektion är förmågan att undersöka klasser, funktioner och nyckelord för att veta vad de är, vad de gör och vad de vet.
Python tillhandahåller flera funktioner och verktyg för kodinspektion.
Ofta är den viktigaste funktionen help, eftersom du kan använda den för att ta reda på vad andra funktioner gör.
Övning
Skriv ut en lista över alla attribut för det givna Vehicle-objektet.
# 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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