Python is a widely known and extensively used programming language with a wide range of functionalities. This tutorial is aimed to provide you with a thorough understanding of the process of adding a quit option in Python scripts. So let’s delve into this straightforward process!
Step 1: Understand the Exit Function
The first step towards adding a quit option in Python is understanding the purpose and functionality of the exit function. Python uses two standard functions to quit a script, which are exit( ) and sys.exit( ). Both these functions serve the purpose of halting the execution of a program.
Step 2: Importing sys Module
The sys module provides access to some Python interpreter operations and variables. Before using sys.exit( ), you must import the sys module using the statement import sys.
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import sys |
Step 3: Call exit Function
After importing the sys module, you can use the sys.exit( ) function to terminate the program. Below is an example where if the user input is ‘quit’, the program will be terminated.
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message = '' while message != 'quit': message = input('> ') if message == 'quit': sys.exit() |
The Complete Code
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import sys message = '' while message != 'quit': message = input('> ') if message == 'quit': sys.exit() |
Conclusion
Hence, adding a quit option in Python is quite simple. You only need to import the sys module and use the sys.exit( ) function appropriately.
This function, once called, terminates the Python script instantaneously. Such a feature can be very useful when you wish to stop the execution of a program based on specific conditions.