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BUG: fix precision to specify decimal places #13897

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BUG: fix precision to specify decimal places #13897

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2 changes: 1 addition & 1 deletion pandas/formats/style.py
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Original file line number Diff line number Diff line change
Expand Up @@ -155,7 +155,7 @@ def __init__(self, data, precision=None, table_styles=None, uuid=None,

def default_display_func(x):
if is_float(x):
return '{:>.{precision}g}'.format(x, precision=self.precision)
return '{:>.{precision}f}'.format(x, precision=self.precision)
else:
return x

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16 changes: 8 additions & 8 deletions pandas/tests/formats/test_style.py
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Expand Up @@ -507,37 +507,37 @@ def test_display_subset(self):
ctx = df.style.format({"a": "{:0.1f}", "b": "{0:.2%}"},
subset=pd.IndexSlice[0, :])._translate()
expected = '0.1'
precise_11 = '1.123400' # with the default precision
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pls also test changing the precision from default.

self.assertEqual(ctx['body'][0][1]['display_value'], expected)
self.assertEqual(ctx['body'][1][1]['display_value'], '1.1234')
self.assertEqual(ctx['body'][1][1]['display_value'], precise_11)
self.assertEqual(ctx['body'][0][2]['display_value'], '12.34%')

raw_11 = '1.1234'
ctx = df.style.format("{:0.1f}",
subset=pd.IndexSlice[0, :])._translate()
self.assertEqual(ctx['body'][0][1]['display_value'], expected)
self.assertEqual(ctx['body'][1][1]['display_value'], raw_11)
self.assertEqual(ctx['body'][1][1]['display_value'], precise_11)

ctx = df.style.format("{:0.1f}",
subset=pd.IndexSlice[0, :])._translate()
self.assertEqual(ctx['body'][0][1]['display_value'], expected)
self.assertEqual(ctx['body'][1][1]['display_value'], raw_11)
self.assertEqual(ctx['body'][1][1]['display_value'], precise_11)

ctx = df.style.format("{:0.1f}",
subset=pd.IndexSlice['a'])._translate()
self.assertEqual(ctx['body'][0][1]['display_value'], expected)
self.assertEqual(ctx['body'][0][2]['display_value'], '0.1234')
self.assertEqual(ctx['body'][0][2]['display_value'], '0.123400')

ctx = df.style.format("{:0.1f}",
subset=pd.IndexSlice[0, 'a'])._translate()
self.assertEqual(ctx['body'][0][1]['display_value'], expected)
self.assertEqual(ctx['body'][1][1]['display_value'], raw_11)
self.assertEqual(ctx['body'][1][1]['display_value'], precise_11)

ctx = df.style.format("{:0.1f}",
subset=pd.IndexSlice[[0, 1], ['a']])._translate()
self.assertEqual(ctx['body'][0][1]['display_value'], expected)
self.assertEqual(ctx['body'][1][1]['display_value'], '1.1')
self.assertEqual(ctx['body'][0][2]['display_value'], '0.1234')
self.assertEqual(ctx['body'][1][2]['display_value'], '1.1234')
self.assertEqual(ctx['body'][0][2]['display_value'], '0.123400')
self.assertEqual(ctx['body'][1][2]['display_value'], '1.123400')

def test_display_dict(self):
df = pd.DataFrame([[.1234, .1234], [1.1234, 1.1234]],
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