add parse_freqs() method

da_detector.py

@@ -27,3 +27,19 @@ class da_detector:
 		except Exception as e:
 			raise e
 		return data
+
+	def parse_freqs(self, path):
+		import json
+
+		fullpath = freqs_folder + path
+		try:
+			with open(fullpath, 'r') as f:
+				j_data = f.read()
+		except Exception as e:
+			raise e
+
+		try:
+			obj = json.loads(j_data)
+		except Exception as e:
+			raise e
+		return obj