def fromRecords(cls, data, major_field, minor_field,
exclude=None):
"""
Create LongPanel from DataFrame or record / structured ndarray
object
Parameters
----------
data : DataFrame, structured or record array, or dict
major_field : string
minor_field : string
Name of field
exclude : list-like, default None
Returns
-------
LongPanel
"""
if isinstance(data, np.ndarray):
# Dtype when you have data
if not issubclass(data.dtype.type, np.void):
raise ValueError('Input was not a structured array!')
columns = data.dtype.names
data = dict((k, data[k]) for k in columns)
elif isinstance(data, DataFrame):
data = data._series.copy()
elif isinstance(data, dict):
# otherwise will pop columns out of original
data = data.copy()
if exclude is None:
exclude = set()
else:
exclude = set(exclude)
for col in exclude:
del data[col]
major = Factor.fromarray(data.pop(major_field))
minor = Factor.fromarray(data.pop(minor_field))
index = MultiIndex(levels=[major.levels, minor.levels],
labels=[major.labels, minor.labels])
return LongPanel(data, index=index)
def setUp(self):
self.factor = Factor.fromarray(['a', 'b', 'b', 'a',
'a', 'c', 'c', 'c'])
