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Python has variables that can be defined to hold data. There is no need to use a keyword to define a variable. Python infers the type of variables from their content. We can also define multiple variables at once in Python using the comma notation. If we want to force an 'int' to be 'int', we can use the type casting function to force it to be a string. Python can also use type casting functions to force a string from a string to be an integer.