For each key, we have assigned a lambda function as the value, which contains the corresponding branch of code. In this code, we have defined a dictionary called switch, with keys representing the possible values of the variable value. "default": lambda: print( "Nothing valid was selected"), "bar": lambda: print( "bar was selected"), "foo": lambda: print( "foo was selected"), In this approach, the keys of the dictionary are the possible values of the variable being tested, and the values are the corresponding branches of code.įor example, consider the following code: value = "foo" In addition, it can make the code difficult to read and understand.Īnother approach that can be used to create a switch-like statement in Python is to use a dictionary. While this approach works, it can quickly become unwieldy as the number of possible values for the variable increases. Otherwise, the code in the else block will be executed. If value is equal to "bar", the second branch of code will be executed. If value is equal to "foo", the first branch of code will be executed. In this code, we are using an if-else statement to determine which branch of code to execute based on the value of the variable value. One common approach was to use a series of if-else statements, with each branch of code being associated with a different value of the variable being tested.įor example, consider the following code: value = "foo" if value = "foo": Before v3.10īefore the Python switch statement was natively available in the language, programmers had to use other control structures to achieve the same functionality. Whether you are new to Python or an experienced developer, the switch statement can help you write cleaner, more efficient code. In this article, we will explore how to use the switch statement in Python and discuss its advantages over other control structures. It's commonly used when you need to execute different logic depending on a given variable's value, which can have more than 2 (but a finite number) of values. It allows you to quickly and easily create multiple branches of code, depending on the value of a given variable or expression. The switch statement is a powerful and convenient tool for controlling the flow of your program.
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