From 29e7604fb84a107b3e2ba4b6a4cd18a363061df8 Mon Sep 17 00:00:00 2001
From: josw123 <nonswing.z@gmail.com>
Date: Mon, 7 Sep 2020 10:48:55 +0900
Subject: [PATCH] Fix warnings(#35)

---
 dart_fss/fs/fs.py          | 11 ++++++++---
 dart_fss/xbrl/dart_xbrl.py |  2 ++
 2 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/dart_fss/fs/fs.py b/dart_fss/fs/fs.py
index 1a2b59c..54573f2 100644
--- a/dart_fss/fs/fs.py
+++ b/dart_fss/fs/fs.py
@@ -1,7 +1,7 @@
 import pandas as pd
 
 from pandas import DataFrame
-from typing import Dict
+from typing import Dict, Optional
 
 from dart_fss.utils import dict_to_html, create_folder
 
@@ -42,7 +42,7 @@ def separator(self, separator):
             pd.options.display.float_format = '{:}'.format
         self.info['separator'] = separator
 
-    def show(self, tp, show_class: bool = True, show_depth: int = 10, show_concept: bool = True) -> DataFrame:
+    def show(self, tp, show_class: bool = True, show_depth: int = 10, show_concept: bool = True) -> Optional[DataFrame]:
         """
         재무제표 정보를 표시해주는 Method
 
@@ -75,6 +75,8 @@ class 표시 여부
             for column in columns:
                 if column not in class_columns:
                     ncolumns.append(column)
+            if len(ncolumns) > 0:
+                ncolumns = pd.MultiIndex.from_tuples(ncolumns)
             df = df[ncolumns]
         else:
             drop_rows = []
@@ -88,7 +90,8 @@ class 표시 여부
             for column in columns:
                 if column not in class_columns[show_depth + 1:]:
                     ncolumns.append(column)
-
+            if len(ncolumns) > 0:
+                ncolumns = pd.MultiIndex.from_tuples(ncolumns)
             df = df[ncolumns].drop(drop_rows)
 
         if show_concept is False:
@@ -99,6 +102,8 @@ class 표시 여부
                 for column in columns:
                     if column not in concept_colmuns:
                         ncolumns.append(column)
+                if len(ncolumns) > 0:
+                    ncolumns = pd.MultiIndex.from_tuples(ncolumns)
                 df = df[ncolumns]
         return df
 
diff --git a/dart_fss/xbrl/dart_xbrl.py b/dart_fss/xbrl/dart_xbrl.py
index 3d64bb7..828ba93 100644
--- a/dart_fss/xbrl/dart_xbrl.py
+++ b/dart_fss/xbrl/dart_xbrl.py
@@ -1,5 +1,6 @@
 # -*- coding: utf-8 -*-
 import re
+import pandas as pd
 from typing import List, Union
 
 from pandas import DataFrame
@@ -124,6 +125,7 @@ def get_period_information(self, lang: str = 'ko') -> DataFrame:
         data = df[df.columns[2:]].iloc[3]
         data_set = [(key, data[key]) for key in data.keys()]
         new_columns = list(df.columns[:2]) + [data[0] for data in sorted(data_set, key=lambda x: x[1], reverse=True)]
+        new_columns = pd.MultiIndex.from_tuples(new_columns)
         return df[new_columns]
 
     def get_audit_information(self, lang: str = 'ko') -> DataFrame: