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setops.py
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setops.py
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from __future__ import absolute_import, print_function, division
# complement()
##############
import petl as etl
a = [['foo', 'bar', 'baz'],
['A', 1, True],
['C', 7, False],
['B', 2, False],
['C', 9, True]]
b = [['x', 'y', 'z'],
['B', 2, False],
['A', 9, False],
['B', 3, True],
['C', 9, True]]
aminusb = etl.complement(a, b)
aminusb
bminusa = etl.complement(b, a)
bminusa
# recordcomplement()
####################
import petl as etl
a = [['foo', 'bar', 'baz'],
['A', 1, True],
['C', 7, False],
['B', 2, False],
['C', 9, True]]
b = [['bar', 'foo', 'baz'],
[2, 'B', False],
[9, 'A', False],
[3, 'B', True],
[9, 'C', True]]
aminusb = etl.recordcomplement(a, b)
aminusb
bminusa = etl.recordcomplement(b, a)
bminusa
# diff()
########
import petl as etl
a = [['foo', 'bar', 'baz'],
['A', 1, True],
['C', 7, False],
['B', 2, False],
['C', 9, True]]
b = [['x', 'y', 'z'],
['B', 2, False],
['A', 9, False],
['B', 3, True],
['C', 9, True]]
added, subtracted = etl.diff(a, b)
# rows in b not in a
added
# rows in a not in b
subtracted
# recorddiff()
##############
import petl as etl
a = [['foo', 'bar', 'baz'],
['A', 1, True],
['C', 7, False],
['B', 2, False],
['C', 9, True]]
b = [['bar', 'foo', 'baz'],
[2, 'B', False],
[9, 'A', False],
[3, 'B', True],
[9, 'C', True]]
added, subtracted = etl.recorddiff(a, b)
added
subtracted
# intersection()
################
import petl as etl
table1 = [['foo', 'bar', 'baz'],
['A', 1, True],
['C', 7, False],
['B', 2, False],
['C', 9, True]]
table2 = [['x', 'y', 'z'],
['B', 2, False],
['A', 9, False],
['B', 3, True],
['C', 9, True]]
table3 = etl.intersection(table1, table2)
table3