PyTreeEntry

One step of an accessor: the child entry of a node of type.

Subclasses fix how the step is taken (``__call__``) and written
(``codify``). This base steps with ``obj[entry]``.

`init`

__init__(self, entry: 'Any', type: 'type', kind: 'TreeKind') -> None

Initialize self. See help(type(self)) for accurate signature.

codify(self, node: 'str' = '') -> 'str'

The code that takes this step from the expression node.