Fix handling of missing duration.

Also reformatted/fixed a couple minor things.

This resolves #90.

Author: brndnmtthws

tweet_delete/deleter.py

@@ -257,7 +257,12 @@ def check_and_remove_favorites(self):
         max_id = None
         favorites_read = 0
 
-        click.echo(click.style("checking for favorites", fg="cyan",))
+        click.echo(
+            click.style(
+                "checking for favorites",
+                fg="cyan",
+            )
+        )
 
         while has_favourites:
             has_favourites = False
@@ -300,7 +305,10 @@ def check_and_remove_favorites(self):
 
     def delete_favourite(self, fav):
         click.echo(
-            click.style("deleting favorite with ID={}".format(fav.id), fg="blue",)
+            click.style(
+                "deleting favorite with ID={}".format(fav.id),
+                fg="blue",
+            )
         )
         self.api.DestroyFavorite(status_id=fav.id)
         if fav.id in self.favourites_scheduled_for_deletion:
@@ -327,4 +335,4 @@ def run(self):
                 delay = min([delay, 300])
                 click.echo(click.style("caught exception: {}".format(e), fg="red"))
                 click.echo(click.style("will retry in {}s".format(delay), fg="red"))
-                gevent.sleep(delay)
+                gevent.sleep(int(delay))

tweet_delete/main.py

@@ -14,11 +14,16 @@ def validate_duration(ctx, param, value):
         from pytimeparse import parse
 
         seconds = parse(value)
-        if seconds <= 0:
-            raise click.BadParameter("Duration should be greater than 0")
+        if not seconds or seconds <= 0:
+            raise click.BadParameter(
+                "Duration must be specified and should be greater than 0"
+            )
         return datetime.timedelta(seconds=seconds)
     except ValueError:
-        raise click.BadParameter("Invalid duration (try '24h' or '7 days'")
+        raise click.BadParameter(
+            "Invalid duration (try '60s', '24h' or '7 days'. "
+            "See https://github.com/wroberts/pytimeparse for valid expressions."
+        )
 
 
 def validate_datetime(ctx, param, value):
@@ -127,7 +132,10 @@ def cli(
         )
     else:
         click.echo(
-            click.style("👉 favorites will NOT be deleted".ljust(77) + "👈", fg="yellow",)
+            click.style(
+                "👉 favorites will NOT be deleted".ljust(77) + "👈",
+                fg="yellow",
+            )
         )
     click.echo(click.style("🦅 off we go".ljust(77) + "🦅", fg="green"))
     deleter.run()