def from_json_io(cls, io, number=None, validate=True):
"""
Create an incident from a file.
@param io: An open file containing JSON text.
@type io: A file-like object with a C{read} method that returns UTF-8
L{bytes}.
@param number: The number of the incident.
If C{number} is not C{None} and C{text} includes an incident number
that is different than C{number}, raise an L{InvalidDataError}.
@type number: L{int}
@param validate: If true, raise L{InvalidDataError} is the data does
not validate as a fully-well-formed incident.
@type validate: L{bool}
"""
root = from_json_io(io)
return cls.from_json(root, number, validate)
def from_json_io(cls, io, number=None, validate=True):
root = from_json_io(io)
return cls.from_json(root, number, validate)