Bug fix: cannot test field with `in`

A record is not a dictionary. The bug comes from commit 1431d67b.

Analysis/plot_eddy_contours.py

@@ -75,20 +75,20 @@ def snapshot(ax, ishape_list, readers, *, dashed = False, light = False,
 
         points = shape_rec_extr.shape.points[0]
 
-        if "cyclone" in shape_rec_extr.record:
+        try:
             if shape_rec_extr.record.cyclone == 0:
                     # Anti-cyclone
                 color = "red"
             else:
                 color = "blue"
-        else:
+        except AttributeError:
             color = "green"
 
         lines = ax.plot(points[0], points[1], markersize = 10,
                         color = color, fillstyle = "none",
                         transform = src_crs)
 
-        if "valid" not in shape_rec_extr.record \
+        if not hasattr(shape_rec_extr.record, "valid")  \
            or shape_rec_extr.record.valid == 1:
             if light:
                 lines[0].set_marker("+")
@@ -111,7 +111,7 @@ def snapshot(ax, ishape_list, readers, *, dashed = False, light = False,
                             transform = src_crs)
 
             if not light:
-                if "valid" in shape_rec_extr.record \
+                if hasattr(shape_rec_extr.record, "valid")  \
                    and shape_rec_extr.record.valid == 0:
                     # Invalid outermost contour
                     lines[0].set_marker("s")
@@ -127,13 +127,13 @@ def snapshot(ax, ishape_list, readers, *, dashed = False, light = False,
             if shape_m_s != None and shape_m_s.shapeType != shapefile.NULL:
                 points = np.array(shape_m_s.points)
 
-                if "cyclone" in shape_rec_extr.record:
+                try:
                     if shape_rec_extr.record.cyclone == 0:
                         # Anti-cyclone
                         color = "magenta"
                     else:
                         color = "cyan"
-                else:
+                except AttributeError:
                     color = "green"
 
                 lines = ax.plot(points[:, 0], points[:, 1], color = color,