import sys
sys.version_info

sys.version_info(major=3, minor=4, micro=2, releaselevel='final', serial=0)

import petl as etl
etl.__version__

'1.0.6'

tbl1 = [['foo', 'bar'],
        ['a b c', 1],
        ['d e f', 2],
        [None, 3]]

tbl2 = etl.wrap(tbl1).replace('foo', None, '  ').split('foo', ' ', ['x', 'y', 'z']).replaceall('', None)
tbl2

bar	x	y	z
1	a	b	c
2	d	e	f
3	None	None	None