[bug] conflict with latexify-py

[Freed-Wu]

See https://github.com/google/latexify_py/issues/129#issuecomment-1321738215

[jonathanslenders]

Looks like we have to attach the source code to a function when it's evaluated in the REPL. Do you know how we can do that?

[odashi]

Hi, maybe the cause comes from the line cache, because inspect.getsource eventually obtains the source from it. IPython implicitly sets its inputs to the cache and the created objects reflect the information about the underlying cache.

IPython:

In [1]: def f(): pass

In [2]: import linecache

In [3]: linecache.cache
Out[3]: 
{'<ipython-input-1-40d3b0035d30>': (14,
  None,
  ['def f(): pass\n'],
  '<ipython-input-1-40d3b0035d30>'),
 '<ipython-input-2-d25e465def14>': (17,
  None,
  ['import linecache\n'],
  '<ipython-input-2-d25e465def14>'),
 '<ipython-input-3-38e64b9ea04a>': (16,
  None,
  ['linecache.cache\n'],
  '<ipython-input-3-38e64b9ea04a>')}

In [4]: f.__code__
Out[4]: <code object f at 0x7ff79c706600, file "<ipython-input-1-40d3b0035d30>", line 1>

ptpython:

>>> def f(): pass
>>> import linecache
>>> linecache.cache
{}

>>> f.__code__
<code object f at 0x7fb720d0bcb0, file "<stdin>", line 1>