[issue44674] dataclasses should allow frozendict default value

[Gianni Mariani]

Gianni Mariani  added the comment:

Excellent. Thanks!

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[issue44674] dataclasses should allow frozendict default value

[Gianni Mariani]

New submission from Gianni Mariani :

Using a frozendict as a default value should not cause an error in dataclasses. 
The check for mutability is:

   isinstance(f.default, (list, dict, set))

It appears frozendict has been changed to have a dict base class and it now 
raises an exception.

There should be a way to indicate object mutability as the purpose of the 
isinstance(f.default, (list, dict, set)) check is for mutable default values.

Using default_factory to work around this issue is cumbersome.

--
components: Library (Lib)
messages: 397799
nosy: gianni
priority: normal
severity: normal
status: open
title: dataclasses should allow frozendict default value
type: compile error
versions: Python 3.9

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[issue44674] dataclasses should allow frozendict default value

[Gianni Mariani]

Gianni Mariani  added the comment:

@Arjun - this is about default values (See the bug description - Using a 
frozendict as a default value)

Try this:

from frozendict import frozendict
from dataclasses import dataclass

@dataclass
class A:
a: frozendict = frozendict(a=1)

This used to work until frozendict became a subclass of dict.

Perhaps another fix is to convert any dict to a frozendict? Maybe not.

How would you handle this case? The only thing I figured was:
from frozendict import frozendict, field
from dataclasses import dataclass

AD=frozendict(a=1)
@dataclass
class A:
a: frozendict = field(default_factory=lambda:AD)

Which imho is cumbersome.

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[issue40586] Pydoc should support https for hyperlinks.

[Gianni Mariani]

New submission from Gianni Mariani :

pydoc has a regex hard coded for supporting hyperlinks. It supports http and 
ftp. It should support https.

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components: Demos and Tools
messages: 368601
nosy: owebeeone
priority: normal
severity: normal
status: open
title: Pydoc should support https for hyperlinks.
versions: Python 3.5, Python 3.6, Python 3.7, Python 3.8, Python 3.9

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[issue40586] Pydoc should support https for hyperlinks.

[Gianni Mariani]

Change by Gianni Mariani :


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type:  -> enhancement

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