https://bugs.kde.org/show_bug.cgi?id=369363
Bug ID: 369363
Summary: Type not inferred when iterating objects with __next__
Product: kdev-python
Version: 5.0.1
Platform: Other
OS: Linux
Status: UNCONFIRMED
Severity: normal
Priority: NOR
Component: Language support
Assignee: m...@svenbrauch.de
Reporter: nicolas.alva...@gmail.com
If I have a generator implemented as a function, iterating over it with a for
loop (or list comprehension) correctly deduces the type of the item variable:
def gen1():
yield "blah"
for item1 in gen1():
print(item1)
Here, KDevelop knows item1 is a str, because that is what gen1 yields.
However, if I do the same with a class that has a custom __next__ method, the
type is not deduced:
class Gen2:
def __iter__(self):
return self
def __next__(self):
return "blah"
gen2 = Gen2()
for item2 in gen2:
print(item2)
The tooltip shows item2 as 'mixed', its attributes are not highlighted or
completed, etc.
This affects a few built-in types, such as I/O classes that yield strings
(lines) when iterated. (In many cases the definitions in documentation_files
don't have a __next__ and they should, but the point of this bug is that adding
the missing __next__ makes no difference)
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