deploy: de2245d

_downloads/75c4ab69c0f59fbb1589b03be360a485/optionsparser.py

@@ -0,0 +1,38 @@
+import yaml
+
+def get_parameters(config_file, required, defaults):
+    '''
+    Parameters:
+    Optionfile:  FileName of the yaml file containing the options
+    required:    Dict of required argument names and their object types.
+    defaults:    Dict of default parameters mapping to their default values
+    
+    Returns:     An object with fields named according to required and optional values.
+    '''
+    f = open(config_file)
+    options = yaml.safe_load(f)
+    # create a parameters object that allows setting attributes.
+    parameters = type('Options', (), {})()
+    # check required arguments
+    for arg in required:
+        if not arg in options:
+            raise Exception("Could not find required Argument " + arg + " aborting...")
+        else:
+            if not isinstance(options[arg],required[arg]):
+                raise Exception("Expected input of type " + str(required[arg]) + " but got " + str(type(options[arg])))                
+        print("Setting " + arg + " to " + str(options[arg]))
+        setattr(parameters,arg,options[arg])
+    # check the default values.          
+    for arg in defaults:
+        if arg in options:
+            if not isinstance(options[arg],type(defaults[arg])):
+                #Wrong type for the parameter
+                raise Exception("Expected input of type " + str(type(defaults[arg])) + " but got " + str(type(options[arg])))
+            print("Setting " + arg + " to " + str(options[arg]))
+            setattr(parameters,arg,options[arg])
+        else:
+            print( arg + " not found in option file. Using default: " +str(defaults[arg]))
+            setattr(parameters,arg,defaults[arg])
+    return parameters
+
+