回答編集履歴
4
インスタンス化しないとインスタンス変数出ないじゃん。結論に変更はなし
test
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>>> import re, pandas as pd
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... if re.search("^_[^_]", x):
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追記
test
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どうせ「紳士協定」なので、面倒くさくなる`__`はほとんど見かけない印象があります。
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なので、
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> 現場ではpublicとprivate（らしいもの）のどちらが基本ですか？
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に対しては「（命名規則でprivate的に扱うと決めているだけの）publicが基本」と答えるべきかもしれません。
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修正
test
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```
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（コードブロック内は折り返してくれないので、じっくり見たい方はエディタにコピペしてご鑑賞ください）
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どうせ「紳士協定」なので、面倒くさくなる`__`はほとんど見かけない印象があります。
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1
やっぱり一行ずつ見ることにした。
test
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@@ -10,9 +10,333 @@
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>>> import re, pandas as pd
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>>>
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>>> for x in dir(pd.DataFrame):
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... if re.search("^_[^_]", x):
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... print(x)
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...
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_AXIS_ALIASES
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_AXIS_IALIASES
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_AXIS_LEN
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_AXIS_NAMES
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_AXIS_NUMBERS
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_AXIS_ORDERS
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_AXIS_REVERSED
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_AXIS_SLICEMAP
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_accessors
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_add_numeric_operations
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_add_series_only_operations
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_add_series_or_dataframe_operations
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_agg_by_level
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_agg_doc
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_aggregate
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_aggregate_multiple_funcs
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_align_frame
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_align_series
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_apply_broadcast
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_apply_empty_result
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_apply_raw
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_apply_standard
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_at
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_box_col_values
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_box_item_values
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_builtin_table
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_check_inplace_setting
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_check_is_chained_assignment_possible
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_check_percentile
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_check_setitem_copy
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_clear_item_cache
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_clip_with_one_bound
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_clip_with_scalar
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_combine_const
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_combine_frame
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_combine_match_columns
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_combine_match_index
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_combine_series
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_combine_series_infer
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_compare_frame
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_compare_frame_evaluate
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_consolidate
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_consolidate_inplace
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_construct_axes_dict
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_construct_axes_dict_for_slice
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_construct_axes_dict_from
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_construct_axes_from_arguments
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_constructor
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_constructor_expanddim
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_constructor_sliced
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_convert
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_count_level
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_create_indexer
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_cython_table
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_deprecations
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_dir_additions
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_dir_deletions
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_drop_axis
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_ensure_valid_index
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_expand_axes
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_flex_compare_frame
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_from_arrays
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_from_axes
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_get_agg_axis
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_get_axis
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_get_axis_name
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_get_axis_number
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_get_axis_resolvers
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_get_block_manager_axis
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_get_bool_data
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_get_cacher
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_get_index_resolvers
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_get_item_cache
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_get_numeric_data
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_get_valid_indices
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_get_value
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_get_values
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_getitem_array
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_getitem_column
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_getitem_frame
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_getitem_multilevel
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_getitem_slice
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_gotitem
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_iat
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_iget_item_cache
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_iloc
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_info_axis
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_info_axis_name
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_info_axis_number
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_info_repr
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_init_dict
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_init_mgr
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_init_ndarray
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_internal_names
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_internal_names_set
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_is_builtin_func
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_is_cached
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_is_cython_func
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_is_datelike_mixed_type
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_is_mixed_type
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_is_numeric_mixed_type
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_is_view
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_ix
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_ixs
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_join_compat
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_loc
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_maybe_cache_changed
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_maybe_update_cacher
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_metadata
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_needs_reindex_multi
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_obj_with_exclusions
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_protect_consolidate
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_reduce
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_reindex_axes
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_reindex_axis
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_reindex_columns
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_reindex_index
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_reindex_multi
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_reindex_with_indexers
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_repr_data_resource_
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_repr_fits_horizontal_
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_repr_fits_vertical_
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_repr_html_
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_repr_latex_
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_reset_cache
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_reset_cacher
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_sanitize_column
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_selected_obj
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_selection
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_selection_list
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_selection_name
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_series
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_set_as_cached
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_set_axis
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_set_axis_name
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_set_is_copy
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_set_item
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_set_value
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_setitem_array
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_setitem_frame
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_setitem_slice
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_setup_axes
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_shallow_copy
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_slice
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_stat_axis
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_stat_axis_name
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_stat_axis_number
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_take
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_to_dict_of_blocks
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_try_aggregate_string_function
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_typ
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_unpickle_frame_compat
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_unpickle_matrix_compat
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_update_inplace
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_validate_dtype
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_values
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_where
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_xs
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17
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```
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18
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