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Kodeintrospeksjon
Code introspection er evnen til å undersøke klasser, funksjoner og nøkkelord for å vite hva de er, hva de gjør og hva de vet.
Python gir flere funksjoner og verktøy for kodeinnspektering.
help()
dir()
hasattr()
id()
type()
repr()
callable()
issubclass()
isinstance()
doc
name
Ofte er den viktigste funksjonen hjelp, siden du kan bruke den til å finne ut hva andre funksjoner gjør.
Exercise
Skriv ut en liste over alle attributter til det gitte 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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