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REF: add internal mechanics to separate index/columns sparsification in Styler #41391

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Merged
merged 6 commits into from
May 12, 2021
Merged

REF: add internal mechanics to separate index/columns sparsification in Styler #41391

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d29cac1
add separate index/columns sparsify mechanics
attack68 May 9, 2021
5465953
fix docstring
attack68 May 11, 2021
7c0f687
Merge remote-tracking branch 'upstream/master' into sparisfy_separate
attack68 May 11, 2021
0a57c1a
Merge remote-tracking branch 'upstream/master' into sparisfy_separate
attack68 May 12, 2021
1744a5e
type _get_level_lengths
attack68 May 12, 2021
08b5174
add docs and typing to _translates
attack68 May 12, 2021
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47 changes: 34 additions & 13 deletions pandas/io/formats/style_render.py
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Original file line number Diff line number Diff line change
Expand Up @@ -132,11 +132,16 @@ def _compute(self):
r = func(self)(*args, **kwargs)
return r

def _translate(self):
def _translate(self, sparsify_index=None, sparsify_cols=None):
"""
Convert the DataFrame in `self.data` and the attrs from `_build_styles`
into a dictionary of {head, body, uuid, cellstyle}.
"""
if sparsify_index is None:
sparsify_index = get_option("display.multi_sparse")
if sparsify_cols is None:
sparsify_cols = get_option("display.multi_sparse")

ROW_HEADING_CLASS = "row_heading"
COL_HEADING_CLASS = "col_heading"
INDEX_NAME_CLASS = "index_name"
Expand All @@ -153,14 +158,14 @@ def _translate(self):
}

head = self._translate_header(
BLANK_CLASS, BLANK_VALUE, INDEX_NAME_CLASS, COL_HEADING_CLASS
BLANK_CLASS, BLANK_VALUE, INDEX_NAME_CLASS, COL_HEADING_CLASS, sparsify_cols
)
d.update({"head": head})

self.cellstyle_map: DefaultDict[tuple[CSSPair, ...], list[str]] = defaultdict(
list
)
body = self._translate_body(DATA_CLASS, ROW_HEADING_CLASS)
body = self._translate_body(DATA_CLASS, ROW_HEADING_CLASS, sparsify_index)
d.update({"body": body})

cellstyle: list[dict[str, CSSList | list[str]]] = [
Expand All @@ -185,7 +190,12 @@ def _translate(self):
return d

def _translate_header(
self, blank_class, blank_value, index_name_class, col_heading_class
self,
blank_class,
blank_value,
index_name_class,
col_heading_class,
sparsify_cols,
):
"""
Build each <tr> within table <head>, using the structure:
Expand All @@ -198,7 +208,9 @@ def _translate_header(
+----------------------------+---------------+---------------------------+
"""
# for sparsifying a MultiIndex
col_lengths = _get_level_lengths(self.columns, self.hidden_columns)
col_lengths = _get_level_lengths(
self.columns, sparsify_cols, self.hidden_columns
)

clabels = self.data.columns.tolist()
if self.data.columns.nlevels == 1:
Expand Down Expand Up @@ -268,7 +280,7 @@ def _translate_header(

return head

def _translate_body(self, data_class, row_heading_class):
def _translate_body(self, data_class, row_heading_class, sparsify_index):
"""
Build each <tr> in table <body> in the following format:
+--------------------------------------------+---------------------------+
Expand All @@ -279,7 +291,7 @@ def _translate_body(self, data_class, row_heading_class):
<style></style> block
"""
# for sparsifying a MultiIndex
idx_lengths = _get_level_lengths(self.index)
idx_lengths = _get_level_lengths(self.index, sparsify_index)

rlabels = self.data.index.tolist()
if self.data.index.nlevels == 1:
Expand Down Expand Up @@ -520,14 +532,23 @@ def _element(
}


def _get_level_lengths(index, hidden_elements=None):
def _get_level_lengths(index, sparsify, hidden_elements=None):
"""
Given an index, find the level length for each element.

Optional argument is a list of index positions which
should not be visible.

Result is a dictionary of (level, initial_position): span
Parameters
----------
index : Index
Index or columns to determine lengths of each element
sparsify : bool
Whether to hide or show each distinct element in a MultiIndex
hidden_element : list
Index positions of elements hidden from display in the index affecting
length
Returns
-------
Dict :
Result is a dictionary of (level, initial_position): span
"""
if isinstance(index, MultiIndex):
levels = index.format(sparsify=lib.no_default, adjoin=False)
Expand All @@ -546,7 +567,7 @@ def _get_level_lengths(index, hidden_elements=None):

for i, lvl in enumerate(levels):
for j, row in enumerate(lvl):
if not get_option("display.multi_sparse"):
if not sparsify:
lengths[(i, j)] = 1
elif (row is not lib.no_default) and (j not in hidden_elements):
last_label = j
Expand Down
34 changes: 32 additions & 2 deletions pandas/tests/io/formats/style/test_style.py
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Original file line number Diff line number Diff line change
Expand Up @@ -844,7 +844,24 @@ def test_get_level_lengths(self):
(1, 4): 1,
(1, 5): 1,
}
result = _get_level_lengths(index)
result = _get_level_lengths(index, sparsify=True)
tm.assert_dict_equal(result, expected)

expected = {
(0, 0): 1,
(0, 1): 1,
(0, 2): 1,
(0, 3): 1,
(0, 4): 1,
(0, 5): 1,
(1, 0): 1,
(1, 1): 1,
(1, 2): 1,
(1, 3): 1,
(1, 4): 1,
(1, 5): 1,
}
result = _get_level_lengths(index, sparsify=False)
tm.assert_dict_equal(result, expected)

def test_get_level_lengths_un_sorted(self):
Expand All @@ -858,7 +875,20 @@ def test_get_level_lengths_un_sorted(self):
(1, 2): 1,
(1, 3): 1,
}
result = _get_level_lengths(index)
result = _get_level_lengths(index, sparsify=True)
tm.assert_dict_equal(result, expected)

expected = {
(0, 0): 1,
(0, 1): 1,
(0, 2): 1,
(0, 3): 1,
(1, 0): 1,
(1, 1): 1,
(1, 2): 1,
(1, 3): 1,
}
result = _get_level_lengths(index, sparsify=False)
tm.assert_dict_equal(result, expected)

def test_mi_sparse(self):
Expand Down