renaming docs examples (#972)

* renaming docs examples

* tweaks

docs/examples/models_errors1.py

@@ -0,0 +1,30 @@
+from typing import List
+from pydantic import BaseModel, ValidationError, conint
+
+class Location(BaseModel):
+    lat = 0.1
+    lng = 10.1
+
+class Model(BaseModel):
+    is_required: float
+    gt_int: conint(gt=42)
+    list_of_ints: List[int] = None
+    a_float: float = None
+    recursive_model: Location = None
+
+data = dict(
+    list_of_ints=['1', 2, 'bad'],
+    a_float='not a float',
+    recursive_model={'lat': 4.2, 'lng': 'New York'},
+    gt_int=21,
+)
+
+try:
+    Model(**data)
+except ValidationError as e:
+    print(e)
+
+try:
+    Model(**data)
+except ValidationError as e:
+    print(e.json())