From: Cleber Rosa <crosa@redhat.com>
To: Eduardo Habkost <ehabkost@redhat.com>
Cc: Michael Roth <mdroth@linux.vnet.ibm.com>,
John Snow <jsnow@redhat.com>,
Markus Armbruster <armbru@redhat.com>,
qemu-devel@nongnu.org
Subject: Re: [PATCH 03/16] qapi/expr.py: constrain incoming expression types
Date: Thu, 24 Sep 2020 20:05:07 -0400 [thread overview]
Message-ID: <20200925000507.GE347918@localhost.localdomain> (raw)
In-Reply-To: <20200923194224.GD3312949@habkost.net>
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On Wed, Sep 23, 2020 at 03:42:24PM -0400, Eduardo Habkost wrote:
> On Tue, Sep 22, 2020 at 05:13:00PM -0400, John Snow wrote:
> > mypy does not know the types of values stored in Dicts that masquerade
> > as objects. Help the type checker out by constraining the type.
> >
> > Signed-off-by: John Snow <jsnow@redhat.com>
> > ---
> > scripts/qapi/expr.py | 25 ++++++++++++++++++++++---
> > 1 file changed, 22 insertions(+), 3 deletions(-)
> >
> > diff --git a/scripts/qapi/expr.py b/scripts/qapi/expr.py
> > index 1872a8a3cc..f6b55a87c1 100644
> > --- a/scripts/qapi/expr.py
> > +++ b/scripts/qapi/expr.py
> > @@ -15,9 +15,17 @@
> > # See the COPYING file in the top-level directory.
> >
> > import re
> > +from typing import MutableMapping, Optional
> >
> > from .common import c_name
> > from .error import QAPISemError
> > +from .parser import QAPIDoc
> > +from .source import QAPISourceInfo
> > +
> > +
> > +# Expressions in their raw form are JSON-like structures with arbitrary forms.
> > +# Minimally, their top-level form must be a mapping of strings to values.
> > +Expression = MutableMapping[str, object]
> >
> >
> > # Names must be letters, numbers, -, and _. They must start with letter,
> > @@ -280,9 +288,20 @@ def check_event(expr, info):
> >
> > def check_exprs(exprs):
> > for expr_elem in exprs:
> > - expr = expr_elem['expr']
> > - info = expr_elem['info']
> > - doc = expr_elem.get('doc')
> > + # Expression
> > + assert isinstance(expr_elem['expr'], dict)
> > + expr: Expression = expr_elem['expr']
> > + for key in expr.keys():
> > + assert isinstance(key, str)
>
> mypy doesn't seem to require the key type asserts, on my testing.
>
Do you mean that mypy actually takes notice of the type assert? And
includes that as source of information for the type check or am I
misinterpreting you?
BTW, what I understood from this assert is that a more specific
type than the MutableMapping is desirable here. Did I get that
right John?
- Cleber.
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next prev parent reply other threads:[~2020-09-25 0:06 UTC|newest]
Thread overview: 70+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-22 21:12 [PATCH 00/16] qapi: static typing conversion, pt2 John Snow
2020-09-22 21:12 ` [PATCH 01/16] qapi/expr.py: Remove 'info' argument from nested check_if_str John Snow
2020-09-23 19:26 ` Eduardo Habkost
2020-09-24 23:06 ` Cleber Rosa
2020-09-22 21:12 ` [PATCH 02/16] qapi/expr.py: Check for dict instead of OrderedDict John Snow
2020-09-23 19:26 ` Eduardo Habkost
2020-09-24 23:07 ` Cleber Rosa
2020-09-22 21:13 ` [PATCH 03/16] qapi/expr.py: constrain incoming expression types John Snow
2020-09-23 19:42 ` Eduardo Habkost
2020-09-25 0:05 ` Cleber Rosa [this message]
2020-09-25 0:43 ` John Snow
2020-09-25 0:40 ` John Snow
2020-09-25 0:06 ` Cleber Rosa
2020-09-22 21:13 ` [PATCH 04/16] qapi/expr.py: Add assertion for union type 'check_dict' John Snow
2020-09-23 19:53 ` Eduardo Habkost
2020-09-25 0:47 ` John Snow
2020-09-25 1:08 ` Eduardo Habkost
2020-09-25 1:30 ` John Snow
2020-09-25 0:19 ` Cleber Rosa
2020-09-22 21:13 ` [PATCH 05/16] qapi/expr.py: move string check upwards in check_type John Snow
2020-09-23 19:56 ` Eduardo Habkost
2020-09-25 0:22 ` Cleber Rosa
2020-09-22 21:13 ` [PATCH 06/16] qapi/expr.py: Check type of 'data' member John Snow
2020-09-23 19:58 ` Eduardo Habkost
2020-09-25 0:31 ` Cleber Rosa
2020-09-25 0:50 ` John Snow
2020-09-25 16:48 ` Cleber Rosa
2020-09-22 21:13 ` [PATCH 07/16] qapi/expr.py: Add casts in a few select cases John Snow
2020-09-23 20:01 ` Eduardo Habkost
2020-09-25 0:36 ` Cleber Rosa
2020-09-22 21:13 ` [PATCH 08/16] qapi/expr.py: add type hint annotations John Snow
2020-09-23 20:06 ` Eduardo Habkost
2020-09-25 0:44 ` Cleber Rosa
2020-09-22 21:13 ` [PATCH 09/16] qapi/expr.py: rewrite check_if John Snow
2020-09-23 20:09 ` Eduardo Habkost
2020-09-25 0:50 ` Cleber Rosa
2020-09-22 21:13 ` [PATCH 10/16] qapi/expr.py: Remove single-letter variable John Snow
2020-09-23 20:11 ` Eduardo Habkost
2020-09-25 0:52 ` Cleber Rosa
2020-09-22 21:13 ` [PATCH 11/16] qapi/expr.py: enable pylint checks John Snow
2020-09-23 20:12 ` Eduardo Habkost
2020-09-25 0:53 ` Cleber Rosa
2020-09-22 21:13 ` [PATCH 12/16] qapi/expr.py: Add docstrings John Snow
2020-09-23 20:16 ` Eduardo Habkost
2020-09-25 0:52 ` John Snow
2020-09-25 0:59 ` Cleber Rosa
2020-09-25 1:10 ` John Snow
2020-09-22 21:13 ` [PATCH 13/16] qapi/expr.py: Modify check_keys to accept any Iterable John Snow
2020-09-23 20:17 ` Eduardo Habkost
2020-09-25 1:02 ` Cleber Rosa
2020-09-22 21:13 ` [PATCH 14/16] qapi/expr.py: Use tuples instead of lists for static data John Snow
2020-09-23 20:18 ` Eduardo Habkost
2020-09-25 1:03 ` Cleber Rosa
2020-09-25 1:12 ` John Snow
2020-09-22 21:13 ` [PATCH 15/16] qapi/expr.py: move related checks inside check_xxx functions John Snow
2020-09-23 20:25 ` Eduardo Habkost
2020-09-25 0:58 ` John Snow
2020-09-25 1:09 ` Cleber Rosa
2020-09-22 21:13 ` [PATCH 16/16] qapi/expr.py: Use an expression checker dispatch table John Snow
2020-09-23 20:36 ` Eduardo Habkost
2020-09-25 0:59 ` John Snow
2020-09-25 1:18 ` Cleber Rosa
2020-09-25 1:32 ` John Snow
2020-09-25 6:03 ` Helio Loureiro
2020-09-25 14:16 ` John Snow
2020-09-26 11:31 ` Helio Loureiro
2020-09-30 4:46 ` John Snow
2020-09-25 16:38 ` Cleber Rosa
2020-09-25 17:04 ` John Snow
2020-09-25 22:54 ` [PATCH 00/16] qapi: static typing conversion, pt2 John Snow
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