I find the supplied python traceback facilities quite awkward.
These functions provide convenient facilities.
*Latest release 20240412*:
* stack_dump: new select parameter to pick interesting frames for the listing.
* Provide StackSummary and FrameSummary if Python too old.
## Function `caller(frame_index=-3)`
Return the `Frame` of the caller's caller.
Returns `None` if `frame_index` is out of range.
Useful `frame_index` values:
* `-1`: caller, this function
* `-2`: invoker, who wants to know the caller
* `-3`: the calling function of the invoker
The default `from_index` value is `-3`.
## Function `frames()`
Return the current stack as a list of `Frame` objects.
## Function `stack_dump(f=None, indent=0, frames=None, skip=None, select=None, format_frame=None)`
Recite current or supplied stack to `f`, default `sys.stderr`.
Parameters:
* `f`: the output file object, default `sys.stderr`
* `indent`: how many spaces to indent the stack lines, default `0`
* `frames`: the stack `Frame`s to write,
default obtained from the current stack
* `skip`: the number of `Frame`s to trim from the end of `frames`;
if `frames` is `None` this defaults to `2` to trim the `Frame`s
for the `stack_dump` function and its call to `frames()`,
otherwise the default is `0` to use the supplied `Frame`s as is
* `select`: if not `None`, select particular frames;
if `select` is a `str` it must be present in the frame filename;
otherwise `select(frame)` must be true
# Release Log
*Release 20240412*:
* stack_dump: new select parameter to pick interesting frames for the listing.
* Provide StackSummary and FrameSummary if Python too old.
*Release 20220918*:
caller(): return None if the frame offset is out of range.
*Release 20220429*:
caller: return None if the stack index is out of range.
*Release 20190812*:
stack_dump(): trim the last 2 frames from the listing by default (they are part of stack_dump's implementation).
*Release 20190101*:
* _Frame: rename .functionname to .funcname; caller: turn raw frames into Frames.
* caller(): accept optional frame_index, default -3.
*Release 20160827*:
Add stack_dump().
*Release 20150115*:
PyPI metadata fixups.
*Release 20150111*:
Tag for initial PyPI release of cs.py.stack.
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