Better __repr__ for tables

docs/python-api.rst

@@ -571,7 +571,7 @@ Introspection
 If you have loaded an existing table, you can use introspection to find out more about it::
 
     >>> db["PlantType"]
-    <sqlite_utils.db.Table at 0x10f5960b8>
+    <Table PlantType (id, value)>
 
 The ``.count`` property shows the current number of rows (``select count(*) from table``)::
 

sqlite_utils/db.py

@@ -380,7 +380,10 @@ class Table:
 
     def __repr__(self):
         return "<Table {}{}>".format(
-            self.name, " (does not exist yet)" if not self.exists else ""
+            self.name,
+            " (does not exist yet)"
+            if not self.exists
+            else " ({})".format(", ".join(c.name for c in self.columns)),
         )
 
     @property

tests/test_introspect.py

@@ -57,8 +57,10 @@ def test_schema(existing_db):
     assert "CREATE TABLE foo (text TEXT)" == existing_db["foo"].schema
 
 
-def test_table_repr(existing_db):
-    assert "<Table foo>" == repr(existing_db["foo"])
+def test_table_repr(fresh_db):
+    table = fresh_db["dogs"].insert({"name": "Cleo", "age": 4})
+    assert "<Table dogs (name, age)>" == repr(table)
+    assert "<Table cats (does not exist yet)>" == repr(fresh_db["cats"])
 
 
 def test_indexes(fresh_db):