Update abs.py

Author: cclauss

maths/abs.py

@@ -5,26 +5,24 @@ def abs_val(num):
     """
     Find the absolute value of a number.
 
-    >>abs_val(-5)
-    5
-    >>abs_val(0)
+    >>> abs_val(-5.1)
+    5.1
+    >>> abs_val(-5) == abs_val(5)
+    True
+    >>> abs_val(0)
     0
     """
     return -num if num < 0 else num
 
 
-def main():
-    """Print absolute value of -34."""
-    print(abs_val(-34))  # = 34
-
-
-def testAbs():
+def test_abs_val():
+    """
+    >>> test_abs_val()
+    """
     assert 0 == abs_val(0)
-
     assert 34 == abs_val(34)
-
     assert 100000000000 == abs_val(-100000000000)
 
+
 if __name__ == "__main__":
-    main()
-    testAbs()
+    print(abs_val(-34))  # --> 34