Document parameters for create_droplet()

test/cosmos.py

@@ -69,8 +69,19 @@ def create_domain_record(domain: str, name: str, data: str,
 
 
 def create_droplet(name: str, ssh_key_id: int, region: str = 'ams1',
-                   size: int = 2048, disk: int = 20, image: int = 7):
-    """Create a droplet."""
+                   size: int = 2048, disk: int = 20, image: int = 18):
+    """Create a droplet.
+
+    Required values:
+      - name (str): Name of the droplet
+      - ssh_key_id (int): ssh key id to add
+
+    Optional values with their default values:
+      - image (str): 18 (Ubuntu 18.04 x64)
+      - region (str): 'ams1' (Amsterdam 1)
+      - size (int): 2048 (2GB RAM)
+      - disk (int): 20 (20GB disk space)
+    """
     print('Creating droplet')
 
     data = {