Use "with" statement where possible

Author: Cito

webware/MiscUtils/PickleCache.py

@@ -92,7 +92,8 @@ def read(self, filename,
         if not os.path.exists(filename):
             if v:
                 print(f'Cannot find {filename!r}.')
-            open(filename, 'rb')  # to get a properly constructed IOError
+            with open(filename, 'rb'):
+                pass  # to get a properly constructed IOError
 
         shouldDeletePickle = False
         data = None

webware/PSP/Examples/View.py

@@ -26,7 +26,8 @@ def writeContent(self):
                 self.write('<p style="color:red">'
                            f'No such file {basename} exists</p>')
                 return
-            text = open(filename, encoding='utf-8').read()
+            with open(filename, encoding='utf-8') as pspFile:
+                text = pspFile.read()
             text = self.htmlEncode(text)
             text = text.replace('\n', '<br>').replace('\t', ' '*4)
             self.write(f'<pre>{text}</pre>')

webware/Scripts/MakeAppWorkDir.py

@@ -116,8 +116,9 @@ def makeDirectories(self):
                 self.msg(f"\t{path} already exists.")
             else:
                 os.makedirs(path)
-                open(os.path.join(path, '__init__.py'), 'w',
-                     encoding='ascii').write('#\n')
+                with open(os.path.join(path, '__init__.py'), 'w',
+                          encoding='ascii') as initFile:
+                    initFile.write('#\n')
                 self.msg(f"\t{path} created.")
 
     def copyConfigFiles(self):
@@ -193,14 +194,16 @@ def makeDefaultContext(self):
                 self.msg(f"\t{filename} already exists.")
             else:
                 self.msg(f"\t{filename}")
-                open(filename, "w", encoding='ascii').write(source)
+                with open(filename, "w", encoding='ascii') as sourceFile:
+                    sourceFile.write(source)
         self.msg("Updating config for default context...")
         filename = os.path.join(self._workDir, 'Configs', 'Application.config')
         self.msg(f"\t{filename}")
-        content = open(filename, encoding='utf-8').readlines()
+        with open(filename, encoding='utf-8') as configFile:
+            configLines = configFile.readlines()
         foundContext = 0
         with open(filename, 'w', encoding='utf-8') as output:
-            for line in content:
+            for line in configLines:
                 contextName = self._contextName
                 if line.startswith(
                         f"Contexts[{contextName!r}] = {configDir!r}\n"):