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[PATCH 28/37] qapi/gen.py: update write() to be more idiomatic
From: |
John Snow |
Subject: |
[PATCH 28/37] qapi/gen.py: update write() to be more idiomatic |
Date: |
Tue, 15 Sep 2020 18:40:18 -0400 |
Make the file handling here just a tiny bit more idiomatic.
(I realize this is heavily subjective.)
Use exist_ok=True for os.makedirs and remove the exception,
use fdopen() to wrap the file descriptor in a File-like object,
and use a context manager for managing the file pointer.
Signed-off-by: John Snow <jsnow@redhat.com>
---
scripts/qapi/gen.py | 24 ++++++++++--------------
1 file changed, 10 insertions(+), 14 deletions(-)
diff --git a/scripts/qapi/gen.py b/scripts/qapi/gen.py
index e873901672..bd67f6b069 100644
--- a/scripts/qapi/gen.py
+++ b/scripts/qapi/gen.py
@@ -12,7 +12,6 @@
# See the COPYING file in the top-level directory.
from contextlib import contextmanager
-import errno
import os
import re
from typing import Dict, Generator, List, Optional, Tuple
@@ -60,21 +59,18 @@ def write(self, output_dir: str) -> None:
return
pathname = os.path.join(output_dir, self.fname)
odir = os.path.dirname(pathname)
+
if odir:
- try:
- os.makedirs(odir)
- except os.error as e:
- if e.errno != errno.EEXIST:
- raise
+ os.makedirs(odir, exist_ok=True)
+
fd = os.open(pathname, os.O_RDWR | os.O_CREAT, 0o666)
- f = open(fd, 'r+', encoding='utf-8')
- text = self.get_content()
- oldtext = f.read(len(text) + 1)
- if text != oldtext:
- f.seek(0)
- f.truncate(0)
- f.write(text)
- f.close()
+ with os.fdopen(fd, 'r+', encoding='utf-8') as fp:
+ text = self.get_content()
+ oldtext = fp.read(len(text) + 1)
+ if text != oldtext:
+ fp.seek(0)
+ fp.truncate(0)
+ fp.write(text)
def _wrap_ifcond(ifcond: List[str], before: str, after: str) -> str:
--
2.26.2
- [PATCH 15/37] qapi/common.py: split build_params into new file, (continued)
- [PATCH 15/37] qapi/common.py: split build_params into new file, John Snow, 2020/09/15
- [PATCH 24/37] qapi/gen.py: Fix edge-case of _is_user_module, John Snow, 2020/09/15
- [PATCH 21/37] qapi/commands.py: enable checking with mypy, John Snow, 2020/09/15
- [PATCH 16/37] qapi: establish mypy type-checking baseline, John Snow, 2020/09/15
- [PATCH 18/37] qapi/events.py: Move comments into docstrings, John Snow, 2020/09/15
- [PATCH 22/37] qapi/source.py: add notational type hints, John Snow, 2020/09/15
- [PATCH 19/37] qapi/commands.py: Don't re-bind to variable of different type, John Snow, 2020/09/15
- [PATCH 17/37] qapi/events.py: add notational type hints, John Snow, 2020/09/15
- [PATCH 20/37] qapi/commands.py: add notational type hints, John Snow, 2020/09/15
- [PATCH 23/37] qapi/source.py: delint with pylint, John Snow, 2020/09/15
- [PATCH 28/37] qapi/gen.py: update write() to be more idiomatic,
John Snow <=
- [PATCH 29/37] qapi/gen.py: delint with pylint, John Snow, 2020/09/15
- [PATCH 27/37] qapi/gen.py: Remove unused parameter, John Snow, 2020/09/15
- [PATCH 26/37] qapi/gen.py: Enable checking with mypy, John Snow, 2020/09/15
- [PATCH 30/37] qapi/introspect.py: Add a typed 'extra' structure, John Snow, 2020/09/15
- [PATCH 25/37] qapi/gen.py: add notational type hints, John Snow, 2020/09/15
- [PATCH 34/37] qapi/types.py: add notational type hints, John Snow, 2020/09/15
- [PATCH 36/37] qapi/visit.py: remove unused parameters from gen_visit_object, John Snow, 2020/09/15
- [PATCH 37/37] qapi/visit.py: add notational type hints, John Snow, 2020/09/15
- [PATCH 31/37] qapi/introspect.py: add _gen_features helper, John Snow, 2020/09/15
- [PATCH 32/37] qapi/introspect.py: create a typed 'Node' data structure, John Snow, 2020/09/15