def load_ipython_extension(shell):
        __import__("nest_asyncio").apply() # just in case
        shell.enable_html_pager = True
        shell.kernel.do_inspect = types.MethodType(do_inspect, shell)

    
    %reload_ext pidgy
    import pandas

    shell.enable_html_pager = True

    def do_inspect(self, cell, cursor_pos, detail_level=1, omit_sections=(), *, cache={}):
        post = post_bangs(cell, get_bangs(cell, cursor_pos))
        if post:
            data = _do_inspect("", 0, detail_level=0, omit_sections=())
            data["data"]= post
            data["found"] = True
        else:
            data = _do_inspect(cell, cursor_pos, detail_level=0, omit_sections=())
            if not data["found"]:
                data.update(inspect_weave(cell, cursor_pos))
        return data    

    def inspect_weave(code, cursor_pos, cache={}):
        data = dict(found=True)
        if not code.strip(): 
            data["data"] = {"text/markdown": help}
        else:
            tokens = cache.get(code)
            line, offset= lineno_at_cursor(code, cursor_pos)
            if tokens is None:               
                cache.clear()
                tokens = cache[code] = shell.tangle.parse(code)
            where = get_md_pointer(tokens, line, offset)
            data["data"] = {"text/markdown": F"""`{"/".join(where)}`\n\n{code}"""}
        return data

    locals().setdefault("_do_inspect", shell.kernel.do_inspect)

    if I := ("__file__" not in locals()): load_ipython_extension(shell)

    def lineno_at_cursor(cell, cursor_pos=0):
        offset = 0
        for i, line in enumerate(cell.splitlines(True)):
            next_offset = offset + len(line)
            if not line.endswith('\n'): next_offset += 1
            if next_offset > cursor_pos:  break
            offset = next_offset
        col = cursor_pos-offset
        return i, col
        
    def get_md_pointer(tokens, line, offset):
        where = [F"L{line+1}:{offset+1}"]
        for node in tokens:
            if node.type == "root": continue
            if node.map:
                if line < node.map[0]: break
                elif node.map[0] <= line < node.map[1]: where.append(node.type)
        return where

    def get_bangs(cell, cursor_pos):
        if cell[cursor_pos-1] == "!":
            l, r = cell[:cursor_pos], cell[cursor_pos:]
            return len(l) - len(l.rstrip("!")) + len(r) - len(r.strip("!"))
        return 0

    def post_bangs(cell, bangs):
        if bangs>=6:
            result = shell.run_cell(cell, store_history=False, silent=True)
            error = result.error_before_exec or result.error_in_exec
            if error: return {"text/markdown": F"""```pycon\n{"".join(
                    traceback.format_exception(type(error), error, error.__traceback__)
                )}\n```"""}
            else: shell.weave.update()
        if bangs >=3:
            result = shell.environment.from_string(cell, None, pidgy.environment.IPythonTemplate)
            return {"text/markdown": result.render()}

{% set help_hits = inspection.found.mean().round(2) * 100 %}

when we use the normal inspection. we find that there is a lot of time where the contextual help is not found.
for example, when we process all the code inputs in this document the inspector finds information {{help_hits}}% of the time,
meaning {{100-help_hits}}% opportunity!!!

    def measure(x): yield from (shell.kernel.do_inspect(x, i) for i in range(len(x)))
    shell.kernel.do_inspect = _do_inspect
    inspection = pandas.Series(In).apply(measure).apply(list).explode().dropna().apply(pandas.Series)
    load_ipython_extension(shell)

a use is the blank screen is to provide a help interface for people to learn our new tool.
with links to good docs.

    help =\
`pidgy` is markdown/python literate programming language.

* indented code and fenced code are executed

## documentation 

* jinja2 documentation
* markdown documentation
* python documentation