How do I modify the stack list of sys.exc_info()?

FWIW, I can't see an attribute for stack on a traceback.tb_frame object in python 3.8:

try:
    raise Exception('test')
except:
    cls, e, tb = sys.exc_info()
hasattr(tb.tb_frame, 'stack')
False

You can probably do this in a for loop by tracing the tb_next attribute on the traceback:

try:
    do_something()
except Exception as e:
    cls, exc, tb = sys.exc_info()
    for _ in range(3):
        tb_next = tb.tb_next
        # in case you don't have that many frames
        if not tb_next:
            break
        tb = tb_next
    raise cls.with_traceback(tb)

The stack attribute is not a built-in attribute of the frame object in Python. It seems that PyCharm is providing this attribute as a convenience for debugging purposes, but it is not part of the standard Python library.

To achieve your desired result of removing a couple of frames from the stack list, you can use the traceback module to manipulate the traceback object directly. Here's an example:

import traceback
try:
    # Your code here
    pass
except Exception as e:
    tb = e.__traceback__
    tb = tb.tb_next.tb_next  # Skip two frames
    e.__traceback__ = tb
    raise e

In this example, we access the __traceback__ attribute of the exception object (e) to get the traceback object. We then skip two frames by accessing the tb_next attribute twice, and assign the modified traceback object back to __traceback__. Finally, we re-raise the exception to preserve the original behavior.

Note that modifying the traceback object in this way is not a common practice and should be used with caution. It may have unexpected consequences and make debugging more difficult.