UnicodeEncodeError appears when Python calls JS functions: How to solve the encoding problem?

UnicodeEncodeError caused by interaction between Python and JS: Troubleshooting and Solving Coding Problems

This article analyzes UnicodeEncodeError: 'gbk' codec can't encode character '\\xbe' ... error that occurs when calling a JS function in Python. The problem occurs when executing local JS code using execjs.compile() , the code snippet is _0x2b5785(_0x5c2f82, _0xf8afd0) where the first parameter is a string and the second parameter is null . Although JS files are read using UTF-8 encoding, errors still appear, and the error message points to the execjs execution link rather than the file reading link.

The error prompt shows that Python attempts to use GBK encoding to process output containing \xbe characters, but GBK does not support that character, so an error is thrown. This indicates that execjs or its dependency library may have used the wrong encoding method. Even if the JS file is UTF-8 encoded, execjs may use GBK encoding when handling JS function output or internal operations.

Solution:

The root cause of the problem lies in the encoding settings of execjs . You need to check the configuration or system environment variables of execjs to make sure it is encoded using UTF-8. This may require:

1. Modify execjs configuration: Check the execjs documentation, find relevant encoding settings options, and set it to UTF-8.
2. Modify system environment variables: Ensure that the default encoding of the Python running environment is UTF-8. This may require setting the PYTHONIOENCODING environment variable to utf-8 .

Python's None and JS's null:

Python's None and JS's null are semantically equivalent, both representing null values. It is correct to pass Python's None to JS functions as null parameter, this problem has nothing to do with the parameter type.

Through the above steps, execjs can effectively troubleshoot and solve the encoding problems that occur in the interaction between Python and JS. Remember, the point is to ensure that the entire process, from execjs to Python output, is consistently encoded using UTF-8.

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