Peewee KeyError: 'i'
The issue lies within the Metadata for your Batch class. See peewee's example where order_by is used:
class User(BaseModel): username = CharField(unique=True) password = CharField() email = CharField() join_date = DateTimeField() class Meta: order_by = ('username',)where order_by is a tuple containing only username. In your example you have omitted the comma which makes it a regular string instead of a tuple. This would be the correct version of that part of your code:
class Batch(Model): initial_contact_date = DateTimeField(formats="%m-%d-%Y") class Meta: database = DATABASE order_by = ('initial_contact_date',)