How can I display multiple debug messages on the same line in my Python-based game engine?

Displaying Multiple Debug Messages on the Same Line in Python

In game development using a Python-based engine, there often arises a need to display multiple debug messages simultaneously on the same console line. This can enhance the readability of debug logs by keeping related information together. Here’s how you can achieve it:

Using the print Function with End Parameter

By default, the print() function appends a newline at the end of the output. However, you can modify this behavior using the end parameter:

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print("Message 1", end=" ")
print("Message 2", end=" ")
print("Message 3")

The above code will output all messages on the same line, separated by spaces.

Integrating with Logging Frameworks

For more structured output, consider using Python’s built-in logging module, as it allows for more advanced log formatting and handling:

import logging
logging.basicConfig(format='%(message)s', level=logging.DEBUG)
logging.debug('Debug message 1', end=' ')
logging.debug('Debug message 2')

This will configure logs to be output in the same line format.

Utilizing String Streams

For more control over how lines are assembled, use the io.StringIO class to collect messages before printing them:

import io
output = io.StringIO()
print("Message 1", file=output, end=" ")
print("Message 2", file=output, end=" ")
print("Message 3", file=output)
print(output.getvalue())

This technique is useful in scenarios where dynamic accumulation of message parts is necessary, offering more flexible message formations.

Considerations for Game Engines

When using these techniques in a game engine, especially during real-time execution, ensure that performance remains optimal. Excessive use of I/O operations could impact frame rates. Optimize your debug outputs by limiting them to development or debug builds only.