Python-сообщество

 class class1(object):
    def __init__(self):
        self.a = ""
x = class1()
x.a = "first"
y = class1()
y.a = "second"
check = False
for i in range(0,10):
    check = not check
    if check == True:
        q = x.a
        print(q)
    if check == False:
        q = y.a
        print(q)

         q = x.a
        print(q)

         q = y.a
        print(q)

 class class1(object):
    def __init__(self):
        self.a = ""
x = class1()
x.a = "first"
y = class1()
y.a = "second"
check = False
c = x
for i in range(0,10):
    check = not check
    if check == True:
        c = x
    if check == False:
        c = y
        
    q = c.a
    print(q)

  
import time
 
class MyClass:
    def __init__(self, a):
        self.a = a
 
    def get_a(self):
        return self.a
 
d = {
    True: MyClass('first'),
    False: MyClass('second')
}
 
check = False
 
for i in range(10):
    check = not check
    out = d[check].get_a()
    print(out)
    time.sleep(1)

 class class1(object):
    def __init__(self):
        self.a = ""
x = class1()
x.a = "first"
print("Это экземпляр x - >",id(x))
y = class1()
y.a = "second"
print("Это экземпляр y - >",id(y))
check = False
c = x
for i in range(0,2):
    check = not check
    if check == True:
        c = x
        print("Это экземпляр x, но уже с именем c - >",id(c))
    if check == False:
        c = y
        print("Это экземпляр y, но уже с именем c - >",id(c))

Это экземпляр x - > 50113264
Это экземпляр y - > 53866352
Это экземпляр x, но уже с именем c - > 50113264
Это экземпляр y, но уже с именем c - > 53866352

  
class class1(object):
    def __init__(self):
        self.a = ""
 
x = class1()
x.a = "first"
 
y = class1()
y.a = "second"
 
check = False
for i in range(0,10):
    check = not check
    if check == True:
        q = x.a
        print(q)
    if check == False:
        q = y.a
        print(q)

  
class class1(object):
    def __init__(self):
        self.a = ""
 
x = class1()
x.a = "first"
 
y = class1()
y.a = "second"
 
check = False
for i in range(0,10):
    check = not check
    if check == True:
        q = x
    if check == False:
        q = y
    print(q.a)

  
>>> class class1(object):
...     def __init__(self):
...         self.a = ""
... 
>>> x = class1()
>>> x.a = "first"
>>> 
>>> y = class1()
>>> y.a = "second"
>>> 
>>> check = False
>>> for i in range(0,10):
...     check = not check
...     if check == True:
...         q = x
...     if check == False:
...         q = y
...     print(q.a)
... 
first
second
first
second
first
second
first
second
first
second
>>>

  
>>> int(1)
1
>>> int = float
>>> int(1)
1.0
>>>
>>> int = 'abc'
>>> int(1)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: 'str' object is not callable
>>> print(int)
abc
>>>

  
>>> class MyInt(int):
...     def __init__(self, value):
...         self.root = value ** 0.5
... 
>>> number = MyInt(4)
>>> 
>>> number
4
>>> number.root
2.0
>>>

  
>>> class MyInt(int):
...     def __init__(self, value):
...         self.root = value ** 0.5
... 
>>> class MyPrettyInt(MyInt):
...     def __str__(self):
...         return 'My value is {}, my root is {}.'.format(self.real, self.root)
... 
>>> number = MyPrettyInt(4)
>>> 
>>> print(number)
My value is 4, my root is 2.0.
>>>