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# Copyright (C) 2022 The Qt Company Ltd.
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
# flake8: noqa E:721
"""
errorhandler.py
This module handles the TypeError messages which were previously
produced by the generated C code.
This version is at least consistent with the signatures, which
are created by the same module.
Experimentally, we are trying to guess those errors which are
just the wrong number of elements in an iterator.
At the moment, it is unclear whether the information given is
enough to produce a useful ValueError.
This matter will be improved in a later version.
"""
import collections.abc
import typing
from shibokensupport.signature import get_signature
from shibokensupport.signature.mapping import namespace
from textwrap import dedent
def qt_isinstance(inst, the_type):
if the_type == float:
# Qt thinks differently about int and float - simply keep it.
return isinstance(inst, int) or isinstance(inst, float)
if the_type.__module__ == "typing":
if the_type is typing.Any:
return True
if the_type.__origin__ is typing.Union:
return any(qt_isinstance(inst, _) for _ in the_type.__args__)
if the_type.__origin__ in (collections.abc.Sequence,
collections.abc.Iterable):
try:
return all(qt_isinstance(_, the_type.__args__[0]) for _ in inst)
except TypeError:
return False
try:
return isinstance(inst, the_type)
except TypeError as e:
print(f"FIXME qt_isinstance({inst}, {the_type}):", e)
return False
def matched_type(args, sigs):
for sig in sigs:
params = list(sig.parameters.values())
if len(args) > len(params):
continue
if len(args) < len(params):
k = len(args)
if params[k].default is params[k].empty:
# this is a necessary parameter, so it fails.
continue
if all(qt_isinstance(arg, param.annotation) for arg, param in zip(args, params)):
return sig
return None
def seterror_argument(args, func_name, info):
func = None
try:
func = eval(func_name, namespace)
except Exception as e:
msg = f"Error evaluating `{func_name}`: {e}"
return type(e), msg
if info and type(info) is str:
err = TypeError
if info == "<":
msg = f"{func_name}(): not enough arguments"
elif info == "0":
msg = (f"{func_name}(): not enough arguments. "
"Note: keyword arguments are only supported for optional parameters.")
elif info == ">":
msg = f"{func_name}(): too many arguments"
elif info.isalnum():
msg = f"{func_name}(): got multiple values for keyword argument '{info}'"
else:
msg = f"{func_name}(): {info}"
err = AttributeError
return err, msg
if isinstance(info, Exception):
# PYSIDE-2230: Python 3.12 seems to always do normalization.
err = type(info)
info = info.args[0]
msg = f"{func_name}(): {info}"
return err, msg
if info and type(info) is dict:
msg = f"{func_name}(): unsupported keyword '{tuple(info)[0]}'"
return AttributeError, msg
sigs = get_signature(func, "typeerror")
if not sigs:
msg = f"{func_name}({args}) is wrong (missing signature)"
return TypeError, msg
if type(sigs) != list:
sigs = [sigs]
if type(args) != tuple:
args = (args,)
# temp!
found = matched_type(args, sigs)
if found:
msg = dedent(f"""
{func_name!r} called with wrong argument values:
{func_name}{args}
Found signature:
{func_name}{found}
""").strip()
return ValueError, msg
type_str = ", ".join(type(arg).__name__ for arg in args)
msg = dedent(f"""
{func_name!r} called with wrong argument types:
{func_name}({type_str})
Supported signatures:
""").strip()
for sig in sigs:
msg += f"\n {func_name}{sig}"
# We don't raise the error here, to avoid the loader in the traceback.
return TypeError, msg
def check_string_type(s):
return isinstance(s, str)
def make_helptext(func):
existing_doc = func.__doc__
if existing_doc is None and hasattr(func, "__dict__"):
existing_doc = func.__dict__.get("__doc__")
sigs = get_signature(func)
if not sigs:
return existing_doc
if type(sigs) != list:
sigs = [sigs]
try:
func_name = func.__name__
except AttributeError:
func_name = func.__func__.__name__
sigtext = "\n".join(func_name + str(sig) for sig in sigs)
msg = f"{sigtext}\n\n{existing_doc}" if check_string_type(existing_doc) else sigtext
return msg
# end of file
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