fix travis build

Author: Pshrawani

mapbox_tilesets/scripts/cli.py

@@ -509,11 +509,15 @@ def validate_source(features):
 
     click.echo("✔ valid")
 
+
 def validate_source_id(ctx, param, value):
-    if re.match('^[a-zA-Z0-9-_]{1,32}$', value):
+    if re.match("^[a-zA-Z0-9-_]{1,32}$", value):
         return value
     else:
-        raise click.BadParameter('Tileset Source ID is invalid. Must be no more than 32 characters and only include "-", "_", and alphanumeric characters.')
+        raise click.BadParameter(
+            'Tileset Source ID is invalid. Must be no more than 32 characters and only include "-", "_", and alphanumeric characters.'
+        )
+
 
 @cli.command("upload-source")
 @click.argument("username", required=True, type=str)

mapbox_tilesets/utils.py

@@ -157,7 +157,7 @@ def _tile2lng(tile_x, zoom):
     -------
         longitude
     """
-    return ((tile_x / 2 ** zoom) * 360.0) - 180.0
+    return ((tile_x / 2**zoom) * 360.0) - 180.0
 
 
 def _tile2lat(tile_y, zoom):
@@ -174,7 +174,7 @@ def _tile2lat(tile_y, zoom):
     -------
         latitude
     """
-    n = np.pi - 2 * np.pi * tile_y / 2 ** zoom
+    n = np.pi - 2 * np.pi * tile_y / 2**zoom
     return (180.0 / np.pi) * np.arctan(0.5 * (np.exp(n) - np.exp(-n)))
 
 
@@ -198,7 +198,7 @@ def _calculate_tile_area(tile):
     bottom = np.deg2rad(_tile2lat(tile[:, 1] + 1, tile[:, 2]))
     return (
         (np.pi / np.deg2rad(180))
-        * EARTH_RADIUS ** 2
+        * EARTH_RADIUS**2
         * np.abs(np.sin(top) - np.sin(bottom))
         * np.abs(left - right)
     )