Varia's website
https://varia.zone
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
269 lines
9.4 KiB
269 lines
9.4 KiB
1 week ago
|
import inspect
|
||
|
|
from inspect import cleandoc, getdoc, getfile, isclass, ismodule, signature
|
||
|
|
from typing import Any, Collection, Iterable, Optional, Tuple, Type, Union
|
||
|
|
|
||
|
|
from .console import Group, RenderableType
|
||
|
|
from .control import escape_control_codes
|
||
|
|
from .highlighter import ReprHighlighter
|
||
|
|
from .jupyter import JupyterMixin
|
||
|
|
from .panel import Panel
|
||
|
|
from .pretty import Pretty
|
||
|
|
from .table import Table
|
||
|
|
from .text import Text, TextType
|
||
|
|
|
||
|
|
|
||
|
|
def _first_paragraph(doc: str) -> str:
|
||
|
|
"""Get the first paragraph from a docstring."""
|
||
|
|
paragraph, _, _ = doc.partition("\n\n")
|
||
|
|
return paragraph
|
||
|
|
|
||
|
|
|
||
|
|
class Inspect(JupyterMixin):
|
||
|
|
"""A renderable to inspect any Python Object.
|
||
|
|
|
||
|
|
Args:
|
||
|
|
obj (Any): An object to inspect.
|
||
|
|
title (str, optional): Title to display over inspect result, or None use type. Defaults to None.
|
||
|
|
help (bool, optional): Show full help text rather than just first paragraph. Defaults to False.
|
||
|
|
methods (bool, optional): Enable inspection of callables. Defaults to False.
|
||
|
|
docs (bool, optional): Also render doc strings. Defaults to True.
|
||
|
|
private (bool, optional): Show private attributes (beginning with underscore). Defaults to False.
|
||
|
|
dunder (bool, optional): Show attributes starting with double underscore. Defaults to False.
|
||
|
|
sort (bool, optional): Sort attributes alphabetically. Defaults to True.
|
||
|
|
all (bool, optional): Show all attributes. Defaults to False.
|
||
|
|
value (bool, optional): Pretty print value of object. Defaults to True.
|
||
|
|
"""
|
||
|
|
|
||
|
|
def __init__(
|
||
|
|
self,
|
||
|
|
obj: Any,
|
||
|
|
*,
|
||
|
|
title: Optional[TextType] = None,
|
||
|
|
help: bool = False,
|
||
|
|
methods: bool = False,
|
||
|
|
docs: bool = True,
|
||
|
|
private: bool = False,
|
||
|
|
dunder: bool = False,
|
||
|
|
sort: bool = True,
|
||
|
|
all: bool = True,
|
||
|
|
value: bool = True,
|
||
|
|
) -> None:
|
||
|
|
self.highlighter = ReprHighlighter()
|
||
|
|
self.obj = obj
|
||
|
|
self.title = title or self._make_title(obj)
|
||
|
|
if all:
|
||
|
|
methods = private = dunder = True
|
||
|
|
self.help = help
|
||
|
|
self.methods = methods
|
||
|
|
self.docs = docs or help
|
||
|
|
self.private = private or dunder
|
||
|
|
self.dunder = dunder
|
||
|
|
self.sort = sort
|
||
|
|
self.value = value
|
||
|
|
|
||
|
|
def _make_title(self, obj: Any) -> Text:
|
||
|
|
"""Make a default title."""
|
||
|
|
title_str = (
|
||
|
|
str(obj)
|
||
|
|
if (isclass(obj) or callable(obj) or ismodule(obj))
|
||
|
|
else str(type(obj))
|
||
|
|
)
|
||
|
|
title_text = self.highlighter(title_str)
|
||
|
|
return title_text
|
||
|
|
|
||
|
|
def __rich__(self) -> Panel:
|
||
|
|
return Panel.fit(
|
||
|
|
Group(*self._render()),
|
||
|
|
title=self.title,
|
||
|
|
border_style="scope.border",
|
||
|
|
padding=(0, 1),
|
||
|
|
)
|
||
|
|
|
||
|
|
def _get_signature(self, name: str, obj: Any) -> Optional[Text]:
|
||
|
|
"""Get a signature for a callable."""
|
||
|
|
try:
|
||
|
|
_signature = str(signature(obj)) + ":"
|
||
|
|
except ValueError:
|
||
|
|
_signature = "(...)"
|
||
|
|
except TypeError:
|
||
|
|
return None
|
||
|
|
|
||
|
|
source_filename: Optional[str] = None
|
||
|
|
try:
|
||
|
|
source_filename = getfile(obj)
|
||
|
|
except (OSError, TypeError):
|
||
|
|
# OSError is raised if obj has no source file, e.g. when defined in REPL.
|
||
|
|
pass
|
||
|
|
|
||
|
|
callable_name = Text(name, style="inspect.callable")
|
||
|
|
if source_filename:
|
||
|
|
callable_name.stylize(f"link file://{source_filename}")
|
||
|
|
signature_text = self.highlighter(_signature)
|
||
|
|
|
||
|
|
qualname = name or getattr(obj, "__qualname__", name)
|
||
|
|
|
||
|
|
# If obj is a module, there may be classes (which are callable) to display
|
||
|
|
if inspect.isclass(obj):
|
||
|
|
prefix = "class"
|
||
|
|
elif inspect.iscoroutinefunction(obj):
|
||
|
|
prefix = "async def"
|
||
|
|
else:
|
||
|
|
prefix = "def"
|
||
|
|
|
||
|
|
qual_signature = Text.assemble(
|
||
|
|
(f"{prefix} ", f"inspect.{prefix.replace(' ', '_')}"),
|
||
|
|
(qualname, "inspect.callable"),
|
||
|
|
signature_text,
|
||
|
|
)
|
||
|
|
|
||
|
|
return qual_signature
|
||
|
|
|
||
|
|
def _render(self) -> Iterable[RenderableType]:
|
||
|
|
"""Render object."""
|
||
|
|
|
||
|
|
def sort_items(item: Tuple[str, Any]) -> Tuple[bool, str]:
|
||
|
|
key, (_error, value) = item
|
||
|
|
return (callable(value), key.strip("_").lower())
|
||
|
|
|
||
|
|
def safe_getattr(attr_name: str) -> Tuple[Any, Any]:
|
||
|
|
"""Get attribute or any exception."""
|
||
|
|
try:
|
||
|
|
return (None, getattr(obj, attr_name))
|
||
|
|
except Exception as error:
|
||
|
|
return (error, None)
|
||
|
|
|
||
|
|
obj = self.obj
|
||
|
|
keys = dir(obj)
|
||
|
|
total_items = len(keys)
|
||
|
|
if not self.dunder:
|
||
|
|
keys = [key for key in keys if not key.startswith("__")]
|
||
|
|
if not self.private:
|
||
|
|
keys = [key for key in keys if not key.startswith("_")]
|
||
|
|
not_shown_count = total_items - len(keys)
|
||
|
|
items = [(key, safe_getattr(key)) for key in keys]
|
||
|
|
if self.sort:
|
||
|
|
items.sort(key=sort_items)
|
||
|
|
|
||
|
|
items_table = Table.grid(padding=(0, 1), expand=False)
|
||
|
|
items_table.add_column(justify="right")
|
||
|
|
add_row = items_table.add_row
|
||
|
|
highlighter = self.highlighter
|
||
|
|
|
||
|
|
if callable(obj):
|
||
|
|
signature = self._get_signature("", obj)
|
||
|
|
if signature is not None:
|
||
|
|
yield signature
|
||
|
|
yield ""
|
||
|
|
|
||
|
|
if self.docs:
|
||
|
|
_doc = self._get_formatted_doc(obj)
|
||
|
|
if _doc is not None:
|
||
|
|
doc_text = Text(_doc, style="inspect.help")
|
||
|
|
doc_text = highlighter(doc_text)
|
||
|
|
yield doc_text
|
||
|
|
yield ""
|
||
|
|
|
||
|
|
if self.value and not (isclass(obj) or callable(obj) or ismodule(obj)):
|
||
|
|
yield Panel(
|
||
|
|
Pretty(obj, indent_guides=True, max_length=10, max_string=60),
|
||
|
|
border_style="inspect.value.border",
|
||
|
|
)
|
||
|
|
yield ""
|
||
|
|
|
||
|
|
for key, (error, value) in items:
|
||
|
|
key_text = Text.assemble(
|
||
|
|
(
|
||
|
|
key,
|
||
|
|
"inspect.attr.dunder" if key.startswith("__") else "inspect.attr",
|
||
|
|
),
|
||
|
|
(" =", "inspect.equals"),
|
||
|
|
)
|
||
|
|
if error is not None:
|
||
|
|
warning = key_text.copy()
|
||
|
|
warning.stylize("inspect.error")
|
||
|
|
add_row(warning, highlighter(repr(error)))
|
||
|
|
continue
|
||
|
|
|
||
|
|
if callable(value):
|
||
|
|
if not self.methods:
|
||
|
|
continue
|
||
|
|
|
||
|
|
_signature_text = self._get_signature(key, value)
|
||
|
|
if _signature_text is None:
|
||
|
|
add_row(key_text, Pretty(value, highlighter=highlighter))
|
||
|
|
else:
|
||
|
|
if self.docs:
|
||
|
|
docs = self._get_formatted_doc(value)
|
||
|
|
if docs is not None:
|
||
|
|
_signature_text.append("\n" if "\n" in docs else " ")
|
||
|
|
doc = highlighter(docs)
|
||
|
|
doc.stylize("inspect.doc")
|
||
|
|
_signature_text.append(doc)
|
||
|
|
|
||
|
|
add_row(key_text, _signature_text)
|
||
|
|
else:
|
||
|
|
add_row(key_text, Pretty(value, highlighter=highlighter))
|
||
|
|
if items_table.row_count:
|
||
|
|
yield items_table
|
||
|
|
elif not_shown_count:
|
||
|
|
yield Text.from_markup(
|
||
|
|
f"[b cyan]{not_shown_count}[/][i] attribute(s) not shown.[/i] "
|
||
|
|
f"Run [b][magenta]inspect[/]([not b]inspect[/])[/b] for options."
|
||
|
|
)
|
||
|
|
|
||
|
|
def _get_formatted_doc(self, object_: Any) -> Optional[str]:
|
||
|
|
"""
|
||
|
|
Extract the docstring of an object, process it and returns it.
|
||
|
|
The processing consists in cleaning up the doctring's indentation,
|
||
|
|
taking only its 1st paragraph if `self.help` is not True,
|
||
|
|
and escape its control codes.
|
||
|
|
|
||
|
|
Args:
|
||
|
|
object_ (Any): the object to get the docstring from.
|
||
|
|
|
||
|
|
Returns:
|
||
|
|
Optional[str]: the processed docstring, or None if no docstring was found.
|
||
|
|
"""
|
||
|
|
docs = getdoc(object_)
|
||
|
|
if docs is None:
|
||
|
|
return None
|
||
|
|
docs = cleandoc(docs).strip()
|
||
|
|
if not self.help:
|
||
|
|
docs = _first_paragraph(docs)
|
||
|
|
return escape_control_codes(docs)
|
||
|
|
|
||
|
|
|
||
|
|
def get_object_types_mro(obj: Union[object, Type[Any]]) -> Tuple[type, ...]:
|
||
|
|
"""Returns the MRO of an object's class, or of the object itself if it's a class."""
|
||
|
|
if not hasattr(obj, "__mro__"):
|
||
|
|
# N.B. we cannot use `if type(obj) is type` here because it doesn't work with
|
||
|
|
# some types of classes, such as the ones that use abc.ABCMeta.
|
||
|
|
obj = type(obj)
|
||
|
|
return getattr(obj, "__mro__", ())
|
||
|
|
|
||
|
|
|
||
|
|
def get_object_types_mro_as_strings(obj: object) -> Collection[str]:
|
||
|
|
"""
|
||
|
|
Returns the MRO of an object's class as full qualified names, or of the object itself if it's a class.
|
||
|
|
|
||
|
|
Examples:
|
||
|
|
`object_types_mro_as_strings(JSONDecoder)` will return `['json.decoder.JSONDecoder', 'builtins.object']`
|
||
|
|
"""
|
||
|
|
return [
|
||
|
|
f'{getattr(type_, "__module__", "")}.{getattr(type_, "__qualname__", "")}'
|
||
|
|
for type_ in get_object_types_mro(obj)
|
||
|
|
]
|
||
|
|
|
||
|
|
|
||
|
|
def is_object_one_of_types(
|
||
|
|
obj: object, fully_qualified_types_names: Collection[str]
|
||
|
|
) -> bool:
|
||
|
|
"""
|
||
|
|
Returns `True` if the given object's class (or the object itself, if it's a class) has one of the
|
||
|
|
fully qualified names in its MRO.
|
||
|
|
"""
|
||
|
|
for type_name in get_object_types_mro_as_strings(obj):
|
||
|
|
if type_name in fully_qualified_types_names:
|
||
|
|
return True
|
||
|
|
return False
|