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Python program to make simple calculator In this example you will learn to create a simple calculator that can add,subtract,multiply or divide depending upon the input from the user. Example: simple calculator by using functions. def   add ( num1 , num2 ):    return  num1+num2   def   subtract  ( num1 , num2 ):    return  num1-num2   def   multiply  ( num1 , num2 ):    return  num1*num2   def   divide  ( num1 , num2 ):    return  num1/num2   print ( "please enter your choice :\n" \          "2.subtract\n" \        "3.multiply\n" \        "4.divide\n" )   ch=int( input ( "please enter your choice :" )) num1 = int( input ( "Enter the first number:" ))   if  ch== 1 :    print (num1+num2) elif ...

  Python -  How to merge two dictionaries As we know If you are working as Python developer, data analytics or data scientists for any organisation then it is very important for you to know how to merge two dictionaries. There are various ways in which Dictionaries can be merged by the use of various functions and constructors in Python. In this article, we will discuss a few ways of merging dictionaries.  Using the method update () By using the method update() in Python, one list can be merged into another. But in this, the second list is merged into the first list and no new list is created. It returns  None .    Example # Python code to merge dict using update() method def Merge(dict1, dict2):      return (dict2.update(dict1))        # Driver code dict1 = { 'a' : 20 , 'b' : 8 } dict2 = { 'd' : 6 , 'c' : 4 }   # This return None print (Merge(dict1, dict2))   # changes made in dict2 pri...