class_docstr: Return the value for the nth percentile within the range of values for the
  field within the group.
class_docstr_tok: ["Return","the","value","for","the","nth","percentile","within","the","range","of","values","for","the","field","within","the","group","."]
code: def __init__(self, field: str, pct: float) -> None:
      super().__init__(field, str(pct))
      self._field = field
  
imports: from typing import Union
  from .aggregation import Asc, Desc, Reducer, SortDirection
label_desc: Use image node_id 1 to create a new quantile object from inherited base classes: Reducer with example: obj = quantile(field, pct)