More Pythonic EAPF than LBYL style

setup.py

@@ -9,24 +9,24 @@ def create_config():
     config = configparser.ConfigParser()
      # get existing values if they exist
     fileName = os.path.join(local_dir, '.nemweb_config.ini')
-    if (os.path.isfile(fileName)) and (os.path.exists(fileName)):
-        print("found existing config file: %s" % fileName)
+    try:
         config.read_file(open(fileName))
-    else:
-        print("failed to find existing config file: %s" % fileName)
+        print("found existing config file: %s" % fileName)
+    except (OSError, configparser.ParsingError):
+        print("failed to read existing config file: %s" % fileName)
     if not config.has_section('local_settings'):
             config.add_section('local_settings') 
             print('added local_settings')
-    if config.has_option("local_settings","sqlite_dir"):
+    try:
         old_sqlite_db_dir = config.get("local_settings","sqlite_dir")
-    else:
+    except configparser.NoOptionError:
         old_sqlite_db_dir = os.path.expanduser("~/NEMData/")
     sqlite_db_dir = input("Enter sqlite directory (abs path)[" + old_sqlite_db_dir + "]:")
     sqlite_db_dir = sqlite_db_dir or old_sqlite_db_dir
     print("set sqlite_dir to %s" % sqlite_db_dir)
-    if config.has_option("local_settings","start_date"):
+    try:
         old_start_date = config.get("local_settings","start_date")
-    else:
+    except configparser.NoOptionError:
         old_start_date = "20090701" # oldest known NEM data date
     start_date = input("Enter start date to begin down loading from (YYYYMMDD):[" + old_start_date + "]:")
     start_date = start_date or old_start_date
@@ -42,7 +42,7 @@ def run(self):
         try:
             create_config()
         except:
-            pass
+            print("failed to create config file")
         install.run(self)
 
 class PostDevelopCommand(develop):