| Class | Description | 
|---|---|
| FieldNameIterator | This class is an implementation of the iterator object returned by
  str. | 
| FieldNameIterator.Chunk | |
| FloatFormatter | A class that provides the implementation of floating-point formatting. | 
| IntegerFormatter | A class that provides the implementation of integer formatting. | 
| IntegerFormatter.Traditional | A minor variation on  IntegerFormatterto handle "traditional" %-formatting. | 
| InternalFormat | |
| InternalFormat.Formatter | A class that provides the base for implementations of type-specific formatting. | 
| InternalFormat.Spec | Parsed PEP-3101 format specification of a single field, encapsulating the format for use by
 formatting methods. | 
| MarkupIterator | Provides an implementation of the object that  str. | 
| MarkupIterator.Chunk | |
| TextFormatter | A class that provides the implementation of  strandunicodeformatting. |