Unable to use ASCIIMath macro in Trac 1.5 / Python 3

[roger.oberholtzer@…]

When trying to use this macro in Trac 1.5 and Python 3 (3.10), I get this:

2022-09-08 14:45:08,892 Trac[loader] 
ERROR: Failed to load plugin from /vol1/trac/systems/plugins/ASCIIMath.py:
Traceback (most recent call last):
  File "/usr/lib/python3.10/site-packages/Trac-1.5.4.dev0-py3.10.egg/trac/loader.py", line 105, in _load_py_files
    imp.load_source(plugin_name, plugin_file)
  File "/usr/lib64/python3.10/imp.py", line 172, in load_source
    module = _load(spec)
  File "<frozen importlib._bootstrap>", line 719, in _load
  File "<frozen importlib._bootstrap>", line 688, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 883, in exec_module
  File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
  File "/vol1/trac/systems/plugins/ASCIIMath.py", line 342, in <module>
    Symbol(input="alpha",  el=El("mi", u"\u03B1"))
  File "/vol1/trac/systems/plugins/ASCIIMath.py", line 80, in El
    if isinstance(text, basestring):
NameError: name 'basestring' is not defined

This is with version 18497 of the macro.

[Jeffrey Armstrong]

I have no idea why this ticket is attached to me...

[roger.oberholtzer@…]

Diffs to use ASCIIMath with Python 3.

[anonymous]

I have attached my diffs to make this work with Python 3. I don't know if it will work with Python 2 as I no longer have that installed for testing. I think most differences were things that were depreciated a while ago, and were more recently finally removed.

It works for me in a current Trac 1.5

[Jun Omae]

In 18583:

AsciiMathMacro: make compatible with Python 3 (closes #14153)