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from __future__ import absolute_import, print_function, division
from petl.compat import PY2
from petl.test.helpers import ieq, eq_
from petl.util.counting import valuecount, valuecounter, valuecounts, \
rowlengths, typecounts, parsecounts, stringpatterns, nrows
def test_nrows():
table = (('foo', 'bar'), ('a', 1), ('b',))
actual = nrows(table)
expect = 2
eq_(expect, actual)
def test_valuecount():
table = (('foo', 'bar'), ('a', 1), ('b', 2), ('b', 7))
n, f = valuecount(table, 'foo', 'b')
eq_(2, n)
eq_(2./3, f)
def test_valuecounter():
table = (('foo', 'bar'), ('a', 1), ('b', 2), ('b', 7))
actual = valuecounter(table, 'foo')
expect = {'b': 2, 'a': 1}
eq_(expect, actual)
def test_valuecounter_shortrows():
table = (('foo', 'bar'), ('a', 7), ('b',), ('b', 7))
actual = valuecounter(table, 'foo')
expect = {'b': 2, 'a': 1}
eq_(expect, actual)
actual = valuecounter(table, 'bar')
expect = {7: 2, None: 1}
eq_(expect, actual)
actual = valuecounter(table, 'foo', 'bar')
expect = {('a', 7): 1, ('b', None): 1, ('b', 7): 1}
eq_(expect, actual)
def test_valuecounts():
table = (('foo', 'bar'), ('a', 1), ('b', 2), ('b', 7))
actual = valuecounts(table, 'foo')
expect = (('foo', 'count', 'frequency'), ('b', 2, 2./3), ('a', 1, 1./3))
ieq(expect, actual)
ieq(expect, actual)
def test_valuecounts_shortrows():
table = (('foo', 'bar'),
('a', True),
('x', True),
('b',),
('b', True),
('c', False),
('z', False))
actual = valuecounts(table, 'bar')
expect = (('bar', 'count', 'frequency'),
(True, 3, 3./6),
(False, 2, 2./6),
(None, 1, 1./6))
ieq(expect, actual)
ieq(expect, actual)
def test_valuecounts_multifields():
table = (('foo', 'bar', 'baz'),
('a', True, .12),
('a', True, .17),
('b', False, .34),
('b', False, .44),
('b',),
('b', False, .56))
actual = valuecounts(table, 'foo', 'bar')
expect = (('foo', 'bar', 'count', 'frequency'),
('b', False, 3, 3./6),
('a', True, 2, 2./6),
('b', None, 1, 1./6))
ieq(expect, actual)
ieq(expect, actual)
def test_rowlengths():
table = (('foo', 'bar', 'baz'),
('A', 1, 2),
('B', '2', '3.4'),
('B', '3', '7.8', True),
('D', 'xyz', 9.0),
('E', None),
('F', 9))
actual = rowlengths(table)
expect = (('length', 'count'), (3, 3), (2, 2), (4, 1))
ieq(expect, actual)
def test_typecounts():
table = (('foo', 'bar', 'baz'),
(b'A', 1, 2.),
(b'B', u'2', 3.4),
(u'B', u'3', 7.8, True),
(b'D', u'xyz', 9.0),
(b'E', 42))
actual = typecounts(table, 'foo')
if PY2:
expect = (('type', 'count', 'frequency'),
('str', 4, 4./5),
('unicode', 1, 1./5))
else:
expect = (('type', 'count', 'frequency'),
('bytes', 4, 4./5),
('str', 1, 1./5))
ieq(expect, actual)
actual = typecounts(table, 'bar')
if PY2:
expect = (('type', 'count', 'frequency'),
('unicode', 3, 3./5),
('int', 2, 2./5))
else:
expect = (('type', 'count', 'frequency'),
('str', 3, 3./5),
('int', 2, 2./5))
ieq(expect, actual)
actual = typecounts(table, 'baz')
expect = (('type', 'count', 'frequency'),
('float', 4, 4./5),
('NoneType', 1, 1./5))
ieq(expect, actual)
def test_parsecounts():
table = (('foo', 'bar', 'baz'),
('A', 'aaa', 2),
('B', '2', '3.4'),
('B', '3', '7.8', True),
('D', '3.7', 9.0),
('E', 42))
actual = parsecounts(table, 'bar')
expect = (('type', 'count', 'errors'), ('float', 3, 1), ('int', 2, 2))
ieq(expect, actual)
def test_stringpatterns():
table = (('foo', 'bar'),
('Mr. Foo', '123-1254'),
('Mrs. Bar', '234-1123'),
('Mr. Spo', '123-1254'),
('Mr. Baz', '321 1434'),
('Mrs. Baz', '321 1434'),
('Mr. Quux', '123-1254-XX'))
actual = stringpatterns(table, 'foo')
expect = (('pattern', 'count', 'frequency'),
('Aa. Aaa', 3, 3./6),
('Aaa. Aaa', 2, 2./6),
('Aa. Aaaa', 1, 1./6))
ieq(expect, actual)
actual = stringpatterns(table, 'bar')
expect = (('pattern', 'count', 'frequency'),
('999-9999', 3, 3./6),
('999 9999', 2, 2./6),
('999-9999-AA', 1, 1./6))
ieq(expect, actual)
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