Fixed following SonarQube issues:

- Remove this assignment to the local variable, the value is never used.
  - Rename local variables to match the regular expression
  - Add logic to this except clause or eliminate it and rethrow the exception automatically.
  - Rename fields to match the regular expression
  - Extract this nested conditional expression into an independent statement.
  - Change this default value to "None" and initialize this parameter inside the function/method.
  - Update this function so that its implementation is not identical to __repr__
  - Refactor this method to not always return the same value
  - Reraise this exception to stop the application as the user expects
  - Add missing parameters _w _PY3. This method overrides simplejson.decoder.JSONDecoder.decode.
  - Remove this redundant continue.
  - Remove this unused function declaration
  - Remove this identity check; it will always be False.

web/pgadmin/utils/csv.py

@@ -721,7 +721,7 @@ class DictWriter(object):
             raise ValueError("extrasaction (%s) must be 'raise' or 'ignore'"
                              % self.extrasaction)
         dialect = kwds.get('dialect', "excel")
-        self.Writer = Writer(f, dialect, *args, **kwds)
+        self.writer = Writer(f, dialect, *args, **kwds)
 
     def writeheader(self):
         header = dict(zip(self.fieldnames, self.fieldnames))
@@ -736,7 +736,7 @@ class DictWriter(object):
         return (rowdict.get(key, self.restval) for key in self.fieldnames)
 
     def writerow(self, rowdict):
-        return self.Writer.writerow(self._dict_to_list(rowdict))
+        return self.writer.writerow(self._dict_to_list(rowdict))
 
     def writerows(self, rowdicts):
-        return self.Writer.writerows(map(self._dict_to_list, rowdicts))
+        return self.writer.writerows(map(self._dict_to_list, rowdicts))