what is a class in python
Classes are blueprint used to construct objectswhat is a class in python
Classes are blueprint used to construct objectsclass methods parameters python
class Foo (object):
# ^class name #^ inherits from object
bar = "Bar" #Class attribute.
def __init__(self):
# #^ The first variable is the class instance in methods.
# # This is called "self" by convention, but could be any name you want.
#^ double underscore (dunder) methods are usually special. This one
# gets called immediately after a new instance is created.
self.variable = "Foo" #instance attribute.
print self.variable, self.bar #<---self.bar references class attribute
self.bar = " Bar is now Baz" #<---self.bar is now an instance attribute
print self.variable, self.bar
def method(self, arg1, arg2):
#This method has arguments. You would call it like this: instance.method(1, 2)
print "in method (args):", arg1, arg2
print "in method (attributes):", self.variable, self.bar
a = Foo() # this calls __init__ (indirectly), output:
# Foo bar
# Foo Bar is now Baz
print a.variable # Foo
a.variable = "bar"
a.method(1, 2) # output:
# in method (args): 1 2
# in method (attributes): bar Bar is now Baz
Foo.method(a, 1, 2) #<--- Same as a.method(1, 2). This makes it a little more explicit what the argument "self" actually is.
class Bar(object):
def __init__(self, arg):
self.arg = arg
self.Foo = Foo()
b = Bar(a)
b.arg.variable = "something"
print a.variable # something
print b.Foo.variable # Foopython class with function @classmethod
import numpy as np
class Unknown:
def __init__(self, p1, p2, p3, p4):
self.p1 = p1
self.p2 = p2
self.p3 = p3
self.p4 = p4
def random_func(self, p5):
'''Function that return an array from a range,
with specified shape, and name'''
step1 = np.array(np.arange(self.p1)).reshape((self.p2,self.p3))
step2 = self.p4
print(step2)
print('Printing p5 =>', p5)
return step1
@classmethod
def a_class_method(self, p6):
print(f'This is a class method: {p6}')
#PREPARE PARAMS
# cust_arr = random_func(self.p1, self.p2, self.p3, self.p4)
params = {'p1':12, 'p2':3, 'p3':4, 'p4':'Creating customized array with params'}
#INSTANCIATE
here = Unknown(**params)#16, 4, 4, 'This actually work too!')
here.random_func('This is P5')
Unknown.a_class_method('P6 value is now used !')Copyright © 2021 Codeinu
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