Скачать или смотреть How to Successfully Print Random Alphanumeric Strings in Python

Learn how to fix the issue of printing variables in Python when generating random alphanumeric strings for use in passwords. Get clear, step-by-step guidance on how to implement effective function returns.
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This video is based on the question https://stackoverflow.com/q/62990507/ asked by the user 'Jake' ( https://stackoverflow.com/u/6507453/ ) and on the answer https://stackoverflow.com/a/62990530/ provided by the user 'Aleksander Ikleiw' ( https://stackoverflow.com/u/13137220/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Mastering Random Alphanumeric Strings in Python

In the world of programming, generating random data is essential, especially when it comes to passwords and identifiers. In this guide, we will address a common problem many Python programmers encounter: printing out the variables that hold randomly generated alphanumeric strings. Specifically, we'll focus on how to generate a password using a function and correctly return and print it.

The Problem

You might have tried writing a function to generate a random password and assigned the output to variables, only to find that printing those variables yields None. This can be frustrating if you need to use those strings later in your program. Here's a quick overview of the code that leads to this issue:

[[See Video to Reveal this Text or Code Snippet]]

Why Does This Happen?

In the above code, the issue arises because the function get_random_password_string(length) uses print() instead of return. The print() function displays the output to the console but does not send the value back to wherever the function was called. As a result, A and B receive a value of None when you try to assign the returned value from get_random_password_string.

The Solution: Using the return Statement

To fix this issue, all you need to do is use the return keyword in your function to send the generated password back to where it is called. Here’s a modified version of the code:

[[See Video to Reveal this Text or Code Snippet]]

Key Changes Explained

Change from print() to return: By returning the password in a tuple (text description and password itself), we can store the result directly into variables.

Variable Assignment: Now, when you call the function, A and B store the returned values instead of None.

Output Format: As a result, when you print A and B, you will see the structured output, indicating what the random string passwords are.

Additional Notes

Choosing the Length: You can specify any length for your password by changing the argument in the function call get_random_password_string(length).

Security Reminder: Make sure to handle any passwords securely in your applications, especially if using them in real-world scenarios.

By following this guidance, you’ll be able to generate, store, and print random alphanumeric strings effectively in your Python scripts. Now, get coding and generate those secure passwords with ease!