Class And Static Variables In Python Code Example

Example 1: python static variable in function

#You can make static variables inside a function in many ways. #____________________________________________________________# """1/You can add attributes to a function, and use it as a static variable.""" def foo():     foo.counter += 1     print ("Counter is %d" % foo.counter) foo.counter = 0   #____________________________________________________________# """2/If you want the counter initialization code at the top instead of the bottom, you can create a decorator:""" def static_vars(**kwargs):     def decorate(func):         for k in kwargs:             setattr(func, k, kwargs[k])         return func     return decorate    #Then use the code like this: @static_vars(counter=0) def foo():     foo.counter += 1     print ("Counter is %d" % foo.counter)  #____________________________________________________________# """3/Alternatively, if you don't want to setup the variable outside the function, you can use hasattr() to avoid an AttributeError exception:""" def myfunc():     if not hasattr(myfunc, "counter"):         myfunc.counter = 0  # it doesn't exist yet, so initialize it     myfunc.counter += 1    #____________________________________________________________#

Example 2: static class python

#To create a static method, just add "@staticmethod" before defining it.  >>>class Calculator:     # create static method     @staticmethod     def multiplyNums(x, y):         return x * y  >>>print('Product:', Calculator.multiplyNums(15, 110)) Product:1650

Example 3: creating a static property in python

class Example:   staticVariable = 5    print(Example.staticVariable)  # Prints '5'  instance = Example() print(instance.staticVariable)  # Prints '5'  instance.staticVaraible = 6 print(instance.staticVariabel)  # Prints '6' print(Example.staticVariable)  # Prints '5'  Example.staticVariable = 7 print(Example.staticVariable)  # Prints '7'