Move html repr function to io/formats/format.py

- from groupby module - #34926 (comment)

pandas/core/groupby/groupby.py

@@ -68,6 +68,8 @@ class providing the base-class of operations.
 from pandas.core.sorting import get_group_index_sorter
 from pandas.core.util.numba_ import NUMBA_FUNC_CACHE
 
+from pandas.io.formats.format import repr_html_groupby
+
 _common_see_also = """
  See Also
  --------
@@ -550,27 +552,8 @@ def __repr__(self) -> str:
  return object.__repr__(self)
 
  def _repr_html_(self) -> str:
- max_groups = get_option("display.max_groups")
- max_rows = max(
- 1, get_option("display.max_rows") // min(max_groups, self.ngroups)
- )
- group_names = list(self.groups.keys())
- truncated = max_groups < self.ngroups
- if truncated:
- n_start = (max_groups + 1) // 2
- n_end = max_groups - n_start
- group_names = group_names[:n_start] + group_names[-n_end:]
- repr_html_list = list()
- for group_name in group_names:
- group = self.get_group(group_name)
- if not hasattr(group, "to_html"):
- group = group.to_frame()
- repr_html_list.append(
- f"<H3>Group Key: {group_name}<H3/>\n{group.to_html(max_rows=max_rows)}"
- )
- if truncated:
- repr_html_list.insert(max_groups // 2, "<H3>...<H3/>")
- return "\n".join(repr_html_list)
+ return repr_html_groupby(self)
+
 
  def _assure_grouper(self):
  """

pandas/io/formats/format.py

@@ -1990,3 +1990,27 @@ def buffer_put_lines(buf: IO[str], lines: List[str]) -> None:
  if any(isinstance(x, str) for x in lines):
  lines = [str(x) for x in lines]
  buf.write("\n".join(lines))
+
+
+def repr_html_groupby(group_obj):
+ max_groups = get_option("display.max_groups")
+ max_rows = max(
+ 1, get_option("display.max_rows") // min(max_groups, group_obj.ngroups)
+ )
+ group_names = list(group_obj.groups.keys())
+ truncated = max_groups < group_obj.ngroups
+ if truncated:
+ n_start = (max_groups + 1) // 2
+ n_end = max_groups - n_start
+ group_names = group_names[:n_start] + group_names[-n_end:]
+ repr_html_list = list()
+ for group_name in group_names:
+ group = group_obj.get_group(group_name)
+ if not hasattr(group, "to_html"):
+ group = group.to_frame()
+ repr_html_list.append(
+ f"<H3>Group Key: {group_name}<H3/>\n{group.to_html(max_rows=max_rows)}"
+ )
+ if truncated:
+ repr_html_list.insert(max_groups // 2, "<H3>...<H3/>")
+ return "\n".join(repr_html_list)