Python3 compatibility

[krzkuc1985]

Description

This Pull Request (PR) focuses on enhancing compatibility with Python 3 across the project's tooling, primarily resolving issues that prevent scripts from running correctly in a Python 3 environment. The changes primarily involve fixing syntax and function calls that are deprecated or changed in Python 3 compared to Python 2.

Key changes include:

1. Python 3 Compatibility Enhancements:

• Initial automated syntax migration using futurize -1 -w . for syntax cleanup towards Python 3 compatibility.
• Manual replacement of long with int for Python 3 compatibility, as long was removed in Python 3.
• Improvements in binary handling functions to ensure proper operation under Python 3.
• Escaped backslashes in regex patterns for proper matching and handling in Python 3's string literals.

2. Tooling and Script Fixes:

• Changed Python invocation in tools to be version-neutral.
• Corrected indentation and formatting in the combine_bin function within gen_appbin_user.py.

3. Version Update:

• Updated the project version to 3.0.7.

This work is part of a broader effort to ensure the project's tools and scripts function correctly and reliably in a modern Python 3 environment.

Related

This PR addresses and fixes one of the compatibility issues reported in:

• Fixes part of gen_appbin.py fails with Python 3 #375
• The changes, particularly the enhancements to binary handling and syntax migration, resolve issues where scripts like gen_appbin.py failed when executed with Python 3.

Testing

The changes were tested thoroughly by:

• Executing the modified tools and scripts in both Python 2 and Python 3 environments.
• Verification of correct execution and output was confirmed on both versions, ensuring that the compatibility fixes for Python 3 did not introduce regressions in Python 2.