--- a/trafficintelligence/moving.py	Fri Jul 13 09:59:01 2018 -0400
+++ b/trafficintelligence/moving.py	Sun Jul 15 22:52:26 2018 -0400
@@ -33,7 +33,7 @@
             self.last=last
 
     def __str__(self):
-        return '[{0}, {1}]'.format(self.first, self.last)
+        return '{0}-{1}'.format(self.first, self.last)
 
     def __repr__(self):
         return self.__str__()
@@ -69,6 +69,15 @@
         self.last += offset
 
     @classmethod
+    def parse(cls, s):
+        if '-' in s:
+            tmp = s.split('-')
+            if len(tmp) == 2:
+                return cls(int(tmp[0]), int(tmp[1])) # TODO with floats?
+        print(s+' is not a valid representation of an interval')
+        return None
+    
+    @classmethod
     def union(cls, interval1, interval2):
         '''Smallest interval comprising self and interval2'''
         return cls(min(interval1.first, interval2.first), max(interval2.last, interval2.last))