fixing too many file open errors

pykat/__init__.py

@@ -3,7 +3,7 @@ from __future__ import division
 from __future__ import print_function
 from __future__ import unicode_literals
 
-__version__ = "1.0.11"
+__version__ = "1.0.13"
 
 # This flag is used to switch on the gui features in pkat at import time
 USE_GUI = False

pykat/finesse.py

@@ -924,7 +924,9 @@ class kat(object):
    `^-....____:   +.      {1}\n""".format(pykat.__version__, pykat_web))
     
     def loadKatFile(self, katfile, blocks=None):
-        commands=open(katfile).read()
+        with open(katfile) as f:
+            commands= f.read()
+            
         self.parseCommands(commands, blocks=blocks)
     
     def parseKatCode(self, code, blocks=None):
@@ -1444,11 +1446,10 @@ class kat(object):
         Saves the current kat object to a Finesse input file
         """
         try:
+            with open(filename,'w') as katfile:
                 katScript = "".join(self.generateKatScript())       
-            katfile = open(filename,'w')
                 katfile.writelines(katScript)
                 katfile.flush()
-            katfile.close()
 
         except pkex.BasePyKatException as ex:
             print (ex)