If your Python script isn't returning expected results, check for logical errors, variable scope issues, or incorrect data types. Use print statements or a debugger to trace the flow of execution and identify where things go wrong.

When a Python script does not return the expected results, it can be frustrating and puzzling. The first step in troubleshooting this issue is to look for logical errors within your code. A logical error occurs when your code runs without raising an exception but does not produce the desired output. Carefully review your algorithms and conditional statements to ensure that the logic is sound. Variable scope can also play a crucial role; if variables are defined in a different scope than expected, they may not hold the values you anticipate. Additionally, pay close attention to data types; operations between incompatible types can lead to unexpected behavior. Using print statements throughout your code can help you trace the flow of execution and monitor variable values at various stages. Alternatively, employing a debugger allows for a more systematic approach to inspect your code in real-time, making it easier to identify where things go awry. Lastly, consider testing your functions in isolation with a variety of input values to see how they behave; unit tests can be particularly helpful in this regard. By methodically examining these factors, you can uncover the reasons behind unexpected results and implement effective solutions.