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C3 Also supports certain composites of primitive types. For example, the C3 Type Mapp  is a map between values and keys. We can create a map directly in python in two ways:

1. Let C3 Figure out the type for us: c3.MappObj(value=python_obj) The new Mapp object can be accessed through the .value  property of the MappObj
2. Tell C3 exactly which types are supported with c3.Mapp(c3.MappType.fromString("map<string,any>"), {'a': 5, 'b': [1,2,3]})

Similarly, C3 has the Arry  type which supports plain arrays. We can specify them in the same ways.

1. Let C3 Figure out the type for us: c3.ArryObj(value=python_list)  The new Arry  object can be accessed through the .value  property of the ArryObj
2. Tell C3 exactly which types are supported with c3.Arry(c3.ArryType.fromString('[int]'), [1,2,3,4]) 

In both cases, these primitive types aren't persisted. They can be used anywhere a C3 Type specifies it must have an Obj  type. (Especially useful for DynBatchJobs  or DynMapReduce jobs for contexts).

Additional Resources

• Developer Documentation
  • https://developer.c3.ai/docs/7.12.25/type/PrimitiveType
• C3.ai Academy Videos
  • The TypeSystem Module:
    • Primitive Fields

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The C3 AI Suite also supports abstract types. To define an Abstract Type, add the keyword 'abstract' before the Type definition. Abstract Types cannot be instantiated and must mix-in to another concrete Type. This provides a great way to standardize interfaces. Here's an example:

abstract type InteraceInterface {
	field1: int
    method1: function(double): int
}

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