Update to exception handling

ecnet/error_utils.py

@@ -19,9 +19,7 @@ def calc_rmse(y_hat, y):
 		try:
 			return(np.sqrt(((np.asarray(y_hat)-np.asarray(y))**2).mean()))
 		except:
-			print("Error in calculating RMSE. Check input data format.")
-			raise
-			sys.exit()
+			raise ValueError("Error in calculating RMSE. Check input data format.")
 
 # Calculates the mean average error between two arguments of equal length 
 def calc_mean_abs_error(y_hat, y):
@@ -31,9 +29,7 @@ def calc_mean_abs_error(y_hat, y):
 		try:
 			return(abs(np.asarray(y_hat)-np.asarray(y)).mean())
 		except:
-			print("Error in calculating mean average error. Check input data format.")
-			raise
-			sys.exit()
+			raise ValueError("Error in calculating mean average error. Check input data format.")
 
 # Calculates the median absoltute error between two arguments of equal length			
 def calc_med_abs_error(y_hat, y):
@@ -43,10 +39,7 @@ def calc_med_abs_error(y_hat, y):
 		try:
 			return(np.median(np.absolute(np.asarray(y_hat)-np.asarray(y))))
 		except:
-			return("Error in calculating median absolute error. Check input data format.")
-			raise
-			sys.exit() 
-
+			raise ValueError("Error in calculating median absolute error. Check input data format.")
 
 # Calculates the correlation of determination, or r-squared value, between two arguments of equal length
 def calc_r2(y_hat, y):
@@ -59,9 +52,7 @@ def calc_r2(y_hat, y):
 				y_form.append(y[i][0])
 			y_mean = sum(y_form)/len(y_form)
 		except:
-			print("Error in calculating r-squared. Check input data format.")
-			raise
-			sys.exit()
+			raise ValueError("Error in calculating r-squared. Check input data format.")
 	try:
 		s_res = np.sum((y_hat-y)**2)
 		s_tot = np.sum((y-y_mean)**2)
@@ -72,6 +63,4 @@ def calc_r2(y_hat, y):
 			s_tot = np.sum((np.asarray(y)-y_mean)**2)
 			return(1 - (s_res/s_tot))
 		except:
-			print("Error in calculating r-squared. Check input data format.")
-			raise
-			sys.exit()
+			raise ValueError("Error in calculating r-squared. Check input data format.")