def test_apply_operation_to_column(self):
"""Divide values in a column by 10
"""
tabfile = TabFile('test',self.fp,first_line_is_header=True)
# Check number of columns and header items
self.assertEqual(tabfile.nColumns(),4)
self.assertEqual(tabfile.header(),['chr','start','end','data'])
# Divide data column by 10
tabfile.transformColumn('data',lambda x: x/10)
results = [0.46,0.57,0.68]
for i in range(len(tabfile)):
self.assertEqual(tabfile[i]['data'],results[i])
def test_apply_operation_to_column(self):
"""Divide values in a column by 10
"""
tabfile = TabFile('test', self.fp, first_line_is_header=True)
# Check number of columns and header items
self.assertEqual(tabfile.nColumns(), 4)
self.assertEqual(tabfile.header(), ['chr', 'start', 'end', 'data'])
# Divide data column by 10
tabfile.transformColumn('data', lambda x: x / 10)
results = [0.46, 0.57, 0.68]
for i in range(len(tabfile)):
self.assertEqual(tabfile[i]['data'], results[i])
def test_set_column_to_constant_value(self):
"""Set a column to a constant value using transformColumn
"""
tabfile = TabFile('test',self.fp,first_line_is_header=True)
# Check number of columns and header items
self.assertEqual(tabfile.nColumns(),4)
self.assertEqual(tabfile.header(),['chr','start','end','data'])
# Add a strand column
tabfile.appendColumn('strand')
self.assertEqual(tabfile.nColumns(),5)
self.assertEqual(tabfile.header(),['chr','start','end','data','strand'])
# Set all values to '+'
tabfile.transformColumn('strand',lambda x: '+')
for line in tabfile:
self.assertEqual(line['strand'],'+')
def test_set_column_to_constant_value(self):
"""Set a column to a constant value using transformColumn
"""
tabfile = TabFile('test', self.fp, first_line_is_header=True)
# Check number of columns and header items
self.assertEqual(tabfile.nColumns(), 4)
self.assertEqual(tabfile.header(), ['chr', 'start', 'end', 'data'])
# Add a strand column
tabfile.appendColumn('strand')
self.assertEqual(tabfile.nColumns(), 5)
self.assertEqual(tabfile.header(),
['chr', 'start', 'end', 'data', 'strand'])
# Set all values to '+'
tabfile.transformColumn('strand', lambda x: '+')
for line in tabfile:
self.assertEqual(line['strand'], '+')
def test_apply_operation_to_column(self):
"""Divide values in a column by 10
"""
tabfile = TabFile('test', self.fp, first_line_is_header=True)
# Check number of columns and header items
self.assertEqual(tabfile.nColumns(), 4)
self.assertEqual(tabfile.header(), ['chr', 'start', 'end', 'data'])
# Divide data column by 10
tabfile.transformColumn('data', lambda x: x / 10.0)
results = [0.46, 0.57, 0.68]
for i in range(len(tabfile)):
# When checking the transformed column, coerce
# the values to two decimal places to avoid tests
# failing because of rounding errors (e.g.
# 0.45999999999999996 != 0.46)
self.assertEqual(float("%.2f" % tabfile[i]['data']), results[i])
