python 3 6 logging modul error UnicodeEncodeError charmap codec can t encode characters
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Title: Resolving Python 3.6 Logging Module Error - UnicodeEncodeError
Introduction:
In Python 3.6 and later versions, the logging module is a powerful tool for handling log messages in your application. However, it can sometimes throw a UnicodeEncodeError when trying to log messages containing non-ASCII characters. This error typically occurs on Windows systems when attempting to write these messages to the console or a file. In this tutorial, we will explore the cause of this error and provide a step-by-step guide on how to resolve it.
Error Scenario:
When you run this code on a Windows machine with Python 3.6, you may encounter the following error:
Cause of the Error:
The error occurs because the Windows console uses the 'cp1252' code page (also known as 'charmap') by default, which does not support displaying all Unicode characters. When the logging module attempts to write log messages containing non-ASCII characters to the console or a file, it encounters difficulties encoding these characters using the 'charmap' codec, leading to the UnicodeEncodeError.
Solution:
Change the Console Code Page (Temporary Fix):
You can change the console's code page to one that supports more characters, such as 'utf-8'. This is a temporary solution and can affect other console output, so use it carefully.
Use a Custom Logging Formatter:
A more elegant solution is to create a custom logging formatter that encodes the message to a suitable encoding (e.g., 'utf-8') before writing it to the console or a file. Here's an example of how to set up a custom formatter:
The custom UTF8LoggingFormatter encodes the log message to 'utf-8' encoding, which is compatible with Unicode characters.
By following these solutions, you can resolve the UnicodeEncodeError when using the logging module in Python 3.6 to log messages with non-ASCII characters on Windows. The custom logging formatter provides a more sustainable and robust solution for handling Unicode characters in log messages.
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