update config parser due to deprecated function usage

GPy/util/config.py

@@ -2,31 +2,46 @@
 # This loads the configuration
 #
 import os
+
 try:
-    #Attempt Python 2 ConfigParser setup
+    # Attempt Python 2 ConfigParser setup
     import ConfigParser
+
     config = ConfigParser.ConfigParser()
     from ConfigParser import NoOptionError
 except ImportError:
-    #Attempt Python 3 ConfigParser setup
+    # Attempt Python 3 ConfigParser setup
     import configparser
+
     config = configparser.ConfigParser()
     from configparser import NoOptionError
 
 # This is the default configuration file that always needs to be present.
-default_file = os.path.abspath(os.path.join(os.path.dirname( __file__ ), '..', 'defaults.cfg'))
+default_file = os.path.abspath(
+    os.path.join(os.path.dirname(__file__), "..", "defaults.cfg")
+)
 
 # These files are optional
 # This specifies configurations that are typically specific to the machine (it is found alongside the GPy installation).
-local_file = os.path.abspath(os.path.join(os.path.dirname( __file__ ), '..', 'installation.cfg'))
+local_file = os.path.abspath(
+    os.path.join(os.path.dirname(__file__), "..", "installation.cfg")
+)
 
 # This specifies configurations specific to the user (it is found in the user home directory)
-home = os.getenv('HOME') or os.getenv('USERPROFILE') or ''
-user_file = os.path.join(home,'.config','GPy', 'user.cfg')
+home = os.getenv("HOME") or os.getenv("USERPROFILE") or ""
+user_file = os.path.join(home, ".config", "GPy", "user.cfg")
 
 # Read in the given files.
-config.readfp(open(default_file))
+config.read_file(open(default_file))
 config.read([local_file, user_file])
 
 if not config:
-    raise ValueError("No configuration file found at either " + user_file + " or " + local_file + " or " + default_file + ".")
+    raise ValueError(
+        "No configuration file found at either "
+        + user_file
+        + " or "
+        + local_file
+        + " or "
+        + default_file
+        + "."
+    )