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[PATCH v2 28/38] qapi/gen.py: update write() to be more idiomatic
From: |
John Snow |
Subject: |
[PATCH v2 28/38] qapi/gen.py: update write() to be more idiomatic |
Date: |
Tue, 22 Sep 2020 17:00:51 -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 ba32f776e6..cf340e66d4 100644
--- a/scripts/qapi/gen.py
+++ b/scripts/qapi/gen.py
@@ -14,7 +14,6 @@
# 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
@@ -64,21 +63,18 @@ 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
- Re: [PATCH v2 22/38] qapi/source.py: add type hint annotations, (continued)
[PATCH v2 26/38] qapi/gen.py: Enable checking with mypy, John Snow, 2020/09/22
[PATCH v2 25/38] qapi/gen.py: add type hint annotations, John Snow, 2020/09/22
[PATCH v2 28/38] qapi/gen.py: update write() to be more idiomatic,
John Snow <=
- Re: [PATCH v2 28/38] qapi/gen.py: update write() to be more idiomatic, Eduardo Habkost, 2020/09/23
- Re: [PATCH v2 28/38] qapi/gen.py: update write() to be more idiomatic, John Snow, 2020/09/23
- Re: [PATCH v2 28/38] qapi/gen.py: update write() to be more idiomatic, Cleber Rosa, 2020/09/24
- Re: [PATCH v2 28/38] qapi/gen.py: update write() to be more idiomatic, Markus Armbruster, 2020/09/25
- Re: [PATCH v2 28/38] qapi/gen.py: update write() to be more idiomatic, Daniel P . Berrangé, 2020/09/25
- Re: [PATCH v2 28/38] qapi/gen.py: update write() to be more idiomatic, Eric Blake, 2020/09/25
- Re: [PATCH v2 28/38] qapi/gen.py: update write() to be more idiomatic, Markus Armbruster, 2020/09/25
- Re: [PATCH v2 28/38] qapi/gen.py: update write() to be more idiomatic, Eric Blake, 2020/09/25
- Re: [PATCH v2 28/38] qapi/gen.py: update write() to be more idiomatic, Markus Armbruster, 2020/09/28
- Re: [PATCH v2 28/38] qapi/gen.py: update write() to be more idiomatic, John Snow, 2020/09/28