Hey Everyone,
I came across this code in 'A Byte Of Python' & realized there was a
line I didn't understand. The line is "howMany = staticmethod(howMany)"
(Complete code pasted below.)
I don't think, in my very short Python career, I've heard of a
staticmethod or classmethod. There's very little explanation of them in
the book. I've googled them, but am still confused on exactly what they
are & why they should be used. The only sense I can make of them is, a
staticmethod can be called WITHOUT actually creating an object first.
Anyways, if someone could give me a simple explanation with a very
simple example, I will be elated! As always, thank you in advance for
any help!! Code Below:
PS: Please keep in mind, Python is my 1st language, & I'm very new to it
(4 to 5 months).
class Robot:
'''Represents a robot, with a name.'''
# A class variable, counting the number of robots
population = 0
def __init__(self, name):
'''Initializes the data.'''
self.name = name
print('(Initializing {0})'.format(self.name))
# When this person is created, the robot
# adds to the population
Robot.population += 1
def __del__(self):
'''I am dying.'''
print('{0} is being destroyed!'.format(self.name))
Robot.population -= 1
if Robot.population == 0:
print('{0} was the last one.'.format(self.name))
else:
print('There are still {0:d} robots
working.'.format(Robot.population))
def sayHi(self):
'''Greeting by the robot.
Yeah, they can do that.'''
print('Greetings, my masters call me {0}.'.format(self.name))
def howMany():
'''Prints the current population.'''
print('We have {0:d} robots.'.format(Robot.population))
howMany = staticmethod(howMany)
droid1 = Robot('R2-D2')
droid1.sayHi()
Robot.howMany()
droid2 = Robot('C-3PO')
droid2.sayHi()
Robot.howMany()
print("\nRobots can do some work here.\n")
print("Robots have finished their work. So let's destroy them.")
del droid1
del droid2
Robot.howMany()
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