add verbose flag to qvp code (ARM-DOE#1108)

* add verbose flag

* remove casual

pyart/retrieve/qvp.py

@@ -8,7 +8,7 @@
 from ..core.transforms import antenna_to_cartesian
 
 
-def quasi_vertical_profile(radar, desired_angle=None, fields=None, gatefilter=None):
+def quasi_vertical_profile(radar, desired_angle=None, fields=None, gatefilter=None,verbose=False):
 
     """
     Quasi Vertical Profile.
@@ -25,6 +25,8 @@ def quasi_vertical_profile(radar, desired_angle=None, fields=None, gatefilter=No
     desired_angle : float
         Radar tilt angle to use for indexing radar field data.
         None will result in wanted_angle = 20.0
+    verbose : bool
+        boolean flag to turn the printing of radar tilts on or off. 
 
     Other Parameters
     ----------------
@@ -63,9 +65,10 @@ def quasi_vertical_profile(radar, desired_angle=None, fields=None, gatefilter=No
     index = abs(radar.fixed_angle['data'] - desired_angle).argmin()
     radar_slice = radar.get_slice(index)
 
-    # Printing radar tilt angles and radar elevation
-    print(radar.fixed_angle['data'])
-    print(radar.elevation['data'][-1])
+    if verbose:
+        # Printing radar tilt angles and radar elevation
+        print(radar.fixed_angle['data'])
+        print(radar.elevation['data'][-1])
 
     # Setting field parameters
     # If fields is None then all radar fields pulled else defined field is used