How do you access command line arguments in Python?

Understanding Command Line Arguments in Python

In python development, it is often necessary to access command line arguments passed during script execution. This article addresses this specific scenario and provides a clear explanation of how to retrieve and utilize these arguments.

To access command line arguments in Python, you can employ the sys.argv variable. This variable is a list that contains all the arguments passed to the script. The first element in the list is always the name of the script itself. Any additional arguments provided will be listed in order after the script name.

Implementation

Let's demonstrate this with a practical example. Suppose you have a script named myfile.py and you want to access the arguments passed during execution. You can use the following code:

import sys

print(sys.argv)

Now, if you execute the script with command line arguments, such as $ python myfile.py var1 var2 var3, the sys.argv variable will contain the following list:

['myfile.py', 'var1', 'var2', 'var3']

Therefore, you can access the arguments as sys.argv[1], sys.argv[2], and sys.argv[3] to obtain 'var1', 'var2', and 'var3', respectively.

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