From b5eda37c757c329d24de26c2ce7b9d394732f8c4 Mon Sep 17 00:00:00 2001
From: Eli Schwartz <eschwartz@archlinux.org>
Date: Mon, 27 May 2019 13:12:09 -0400
Subject: [PATCH] use contextmanagers for open()

---
 src/calibre/ebooks/conversion/plugins/mobi_input.py   | 3 ++-
 src/calibre/ebooks/conversion/plugins/recipe_input.py | 6 ++++--
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/src/calibre/ebooks/conversion/plugins/mobi_input.py b/src/calibre/ebooks/conversion/plugins/mobi_input.py
index 8c42e8345d..e9a89b5860 100644
--- a/src/calibre/ebooks/conversion/plugins/mobi_input.py
+++ b/src/calibre/ebooks/conversion/plugins/mobi_input.py
@@ -52,7 +52,8 @@ class MOBIInput(InputFormatPlugin):
         if raw:
             if isinstance(raw, unicode_type):
                 raw = raw.encode('utf-8')
-            open(u'debug-raw.html', 'wb').write(raw)
+            with open(u'debug-raw.html', 'wb') as f:
+                f.write(raw)
         from calibre.ebooks.oeb.base import close_self_closing_tags
         for f, root in parse_cache.items():
             raw = html.tostring(root, encoding='utf-8', method='xml',
diff --git a/src/calibre/ebooks/conversion/plugins/recipe_input.py b/src/calibre/ebooks/conversion/plugins/recipe_input.py
index 26577a5e60..2670859e21 100644
--- a/src/calibre/ebooks/conversion/plugins/recipe_input.py
+++ b/src/calibre/ebooks/conversion/plugins/recipe_input.py
@@ -65,7 +65,8 @@ class RecipeInput(InputFormatPlugin):
             zf = ZipFile(recipe_or_file, 'r')
             zf.extractall()
             zf.close()
-            self.recipe_source = open(u'download.recipe', 'rb').read()
+            with open('download.recipe', 'rb') as f:
+                self.recipe_source = f.read()
             recipe = compile_recipe(self.recipe_source)
             recipe.needs_subscription = False
             self.recipe_object = recipe(opts, log, self.report_progress)
@@ -87,7 +88,8 @@ class RecipeInput(InputFormatPlugin):
                     self.recipe_source = self.recipe_source.encode('utf-8')
                 recipe = compile_recipe(self.recipe_source)
             elif os.access(recipe_or_file, os.R_OK):
-                self.recipe_source = open(recipe_or_file, 'rb').read()
+                with open(recipe_or_file, 'rb') as f:
+                    self.recipe_source = f.read()
                 recipe = compile_recipe(self.recipe_source)
                 log('Using custom recipe')
             else: