Pandas 我如何更新我令人不安的python功能，以包括没有选项的产品？

我正在尝试从数据框中的选项中提取大小和颜色，它正在部分使用下面的代码-

def unnest(df, col, col2,reset_index=False):
 col_flat = pd.DataFrame([[i, x]
                  for i, y in df[col].apply(list).iteritems()
                      for x in y ], columns=['I', col]
                       )
 col_flat = col_flat.set_index('I')
 df = df.drop(col, 1)
 df = df.merge(col_flat, left_index=True, right_index=True)

 if reset_index:
     df = df.reset_index(drop=True)
 merchant_product_code = (df['Product code'] + '-' + df[col])
 df['item_group_id'] = df['Product code']
 df['Product code'] = merchant_product_code
 return df

但是，有些产品具有空白选项（值为[]），当我应用取消测试时，这些选项将被删除

我如何在没有选项值的产品上忽略此问题

取消测试前后的PFB屏幕截图，请参见选项栏-

我正在数据场上应用我的函数，如下所示-

full_df=unnest(full_df,'Options','product code')

完整的屏幕截图如下所示-

我已将完整的_df转换为字典，以便将示例粘贴到这里-

{'Product code': {4: 'BBFTDR-6-12m', 5: 'BBFTPBG-3-6m'}, 'Category': {4: 'Apparel', 5: 'Apparel'}, 'List price': {4: '28', 5: '28'}, 'Price': {4: '28', 5: '28'}, 'Weight': {4: '0', 5: '0'}, 'Quantity': {4: '1', 5: '1'}, 'Min quantity': {4: '0', 5: '0'}, 'Shipping freight': {4: '0', 5: '0'}, 'Date added': {4: '7/9/17 0:00', 5: '7/9/17 0:00'}, 'Downloadable': {4: 'N', 5: 'N'}, 'Files': {4: nan, 5: nan}, 'Ship downloadable': {4: 'N', 5: 'N'}, 'Inventory tracking': {4: 'O', 5: 'O'}, 'Free shipping': {4: 'N', 5: 'N'}, 'Feature comparison': {4: 'N', 5: 'N'}, 'Zero price action': {4: 'P', 5: 'P'}, 'Thumbnail': {4: nan, 5: nan}, 'Detailed image_x': {4: 'https://bebebamboo.com.sg/newshop/images/backup/detailed/Romper_Deer.jpg', 5: 'https://bebebamboo.com.sg/newshop/images/backup/detailed/Romper_Bear_Gray.jpg'}, 'Product name': {4: 'Bamboo Baby Footie with Fold Over Mitten - Deer', 5: 'Bamboo Baby Footie with Fold Over Mitten - Polar Bear Grey'}, 'Description': {4: '<p class="MsoNormal" style="border: 0px; margin: 0px; padding: 6px 0px; color: #333333;"><span style="font-family: \'comic sans ms\', sans-serif; font-size: small;">Bebe Bamboo basic range. Simple yet stylish. This romper has an in built fold over mittens.&nbsp;</span></p><p class="MsoNormal" style="border: 0px; font-size: 13px; margin: 0px; padding: 6px 0px; color: #333333; font-family: Arial, Tahoma, Helvetica, sans-serif;"><span style="border: 0px; font-size: small; margin: 0px; padding: 0px; font-family: \'comic sans ms\', sans-serif;" lang="EN-US">- Extremely soft, delicate and smooth.</span></p><p class="MsoNormal" style="border: 0px; font-size: 13px; margin: 0px; padding: 6px 0px; color: #333333; font-family: Arial, Tahoma, Helvetica, sans-serif;"><span style="border: 0px; font-size: small; margin: 0px; padding: 0px; font-family: \'comic sans ms\', sans-serif;" lang="EN-US">- Promote comfortable and restful sleep.&nbsp;</span></p><p class="MsoNormal" style="border: 0px; font-size: 13px; margin: 0px; padding: 6px 0px; color: #333333; font-family: Arial, Tahoma, Helvetica, sans-serif;"><span style="border: 0px; font-size: small; margin: 0px; padding: 0px; font-family: \'comic sans ms\', sans-serif;" lang="EN-US">&nbsp;</span></p><p class="MsoNormal" style="border: 0px; font-size: 13px; margin: 0px; padding: 6px 0px; color: #333333; font-family: Arial, Tahoma, Helvetica, sans-serif;"><span style="font-family: \'comic sans ms\', sans-serif; font-size: small;">Composition: 70% Viscose from Bamboo, 30% Cotton</span></p><p class="MsoNormal" style="border: 0px; font-size: 13px; margin: 0px; padding: 6px 0px; color: #333333; font-family: Arial, Tahoma, Helvetica, sans-serif;"><span style="border: 0px; font-size: small; margin: 0px; padding: 0px; font-family: \'comic sans ms\', sans-serif;">(Oeko Tex Standard 100)</span></p><p class="MsoNormal" style="border: 0px; font-size: 13px; margin: 0px; padding: 6px 0px; color: #333333; font-family: Arial, Tahoma, Helvetica, sans-serif;"><span style="font-size: small; font-family: \'comic sans ms\', sans-serif;">Lead &amp; Phthalate Free</span></p><p class="MsoNormal" style="border: 0px; font-size: 13px; margin: 0px; padding: 6px 0px; color: #333333; font-family: Arial, Tahoma, Helvetica, sans-serif;"><span style="font-size: small;"><br /></span></p><p class="MsoNormal" style="border: 0px; font-size: 13px; margin: 0px; padding: 6px 0px; color: #333333; font-family: Arial, Tahoma, Helvetica, sans-serif;"><span style="font-family: \'comic sans ms\', sans-serif; font-size: small;">Washing instructions:</span></p><p><span style="font-size: small;">*&nbsp;</span><span style="font-family: \'comic sans ms\', sans-serif; font-size: small;">Machine or hand wash cold</span></p><p><span style="font-size: small;">*&nbsp;</span><span style="font-family: \'comic sans ms\', sans-serif; font-size: small;">Wash and iron inside out</span></p><p><span style="font-size: small;">*&nbsp;</span><span style="font-family: \'comic sans ms\', sans-serif; font-size: small;">Tumble dry low</span></p><p><span style="font-size: small;">*&nbsp;</span><span style="font-family: \'comic sans ms\', sans-serif; font-size: small;">Do not bleach</span></p><p>&nbsp;<img src="http://bebebamboo.com/images/Footie%20washing%20symbol.jpg" alt="" width="152" height="43" /></p><p>&nbsp;</p><p class="MsoNormal" style="border: 0px; font-size: 13px; margin: 0px; padding: 6px 0px; color: #333333; font-family: Arial, Tahoma, Helvetica, sans-serif;"><span style="font-family: \'comic sans ms\', sans-serif; font-size: small;">Available size: 0-3m, 3-6m, 6-12m</span></p><p class="MsoNormal" style="border: 0px; font-size: 13px; margin: 0px; padding: 6px 0px; color: #333333; font-family: Arial, Tahoma, Helvetica, sans-serif;"><span style="font-family: \'comic sans ms\', sans-serif; font-size: small;">Wear Snug Fit, Not Flame Resistant&nbsp;</span></p><p class="MsoNormal" style="border: 0px; font-size: 13px; margin: 0px; padding: 6px 0px; color: #333333; font-family: Arial, Tahoma, Helvetica, sans-serif;"><span style="font-family: \'comic sans ms\', sans-serif; font-size: small;"><br /></span></p><p class="MsoNormal" style="border: 0px; font-size: 13px; margin: 0px; padding: 6px 0px; color: #333333; font-family: Arial, Tahoma, Helvetica, sans-serif;"><span style="font-family: \'comic sans ms\', sans-serif; font-size: small;">Footie measurement (cm)</span></p><p class="MsoNormal" style="border: 0px; font-size: 13px; margin: 0px; padding: 6px 0px; color: #333333; font-family: Arial, Tahoma, Helvetica, sans-serif;"><span style="font-family: \'comic sans ms\', sans-serif; font-size: small;"><img src="http://bebebamboo.com/images/Footie%20size.jpg" alt="" width="578" height="149" /></span></p>', 5: '<p class="MsoNormal" style="border: 0px; margin: 0px; padding: 6px 0px; color: #333333;"><span style="font-family: \'comic sans ms\', sans-serif; font-size: small;">Bebe Bamboo basic range. Simple yet stylish. This romper has an in built fold over mittens.&nbsp;</span></p><p class="MsoNormal" style="border: 0px; font-size: 13px; margin: 0px; padding: 6px 0px; color: #333333; font-family: Arial, Tahoma, Helvetica, sans-serif;"><span style="border: 0px; font-size: small; margin: 0px; padding: 0px; font-family: \'comic sans ms\', sans-serif;" lang="EN-US">- Extremely soft, delicate and smooth.</span></p><p class="MsoNormal" style="border: 0px; font-size: 13px; margin: 0px; padding: 6px 0px; color: #333333; font-family: Arial, Tahoma, Helvetica, sans-serif;"><span style="border: 0px; font-size: small; margin: 0px; padding: 0px; font-family: \'comic sans ms\', sans-serif;" lang="EN-US">- Promote comfortable and restful sleep.&nbsp;</span></p><p class="MsoNormal" style="border: 0px; font-size: 13px; margin: 0px; padding: 6px 0px; color: #333333; font-family: Arial, Tahoma, Helvetica, sans-serif;"><span style="border: 0px; font-size: small; margin: 0px; padding: 0px; font-family: \'comic sans ms\', sans-serif;" lang="EN-US">&nbsp;</span></p><p class="MsoNormal" style="border: 0px; font-size: 13px; margin: 0px; padding: 6px 0px; color: #333333; font-family: Arial, Tahoma, Helvetica, sans-serif;"><span style="font-family: \'comic sans ms\', sans-serif; font-size: small;">Composition: 70% Viscose from Bamboo, 30% Cotton</span></p><p class="MsoNormal" style="border: 0px; font-size: 13px; margin: 0px; padding: 6px 0px; color: #333333; font-family: Arial, Tahoma, Helvetica, sans-serif;"><span style="border: 0px; font-size: small; margin: 0px; padding: 0px; font-family: \'comic sans ms\', sans-serif;">(Oeko Tex Standard 100)</span></p><p class="MsoNormal" style="border: 0px; font-size: 13px; margin: 0px; padding: 6px 0px; color: #333333; font-family: Arial, Tahoma, Helvetica, sans-serif;"><span style="font-size: small; font-family: \'comic sans ms\', sans-serif;">Lead &amp; Phthalate Free</span></p><p class="MsoNormal" style="border: 0px; font-size: 13px; margin: 0px; padding: 6px 0px; color: #333333; font-family: Arial, Tahoma, Helvetica, sans-serif;"><span style="font-size: small;"><br /></span></p><p class="MsoNormal" style="border: 0px; font-size: 13px; margin: 0px; padding: 6px 0px; color: #333333; font-family: Arial, Tahoma, Helvetica, sans-serif;"><span style="font-family: \'comic sans ms\', sans-serif; font-size: small;">Washing instructions:</span></p><p><span style="font-size: small;">*&nbsp;</span><span style="font-family: \'comic sans ms\', sans-serif; font-size: small;">Machine or hand wash cold</span></p><p><span style="font-size: small;">*&nbsp;</span><span style="font-family: \'comic sans ms\', sans-serif; font-size: small;">Wash and iron inside out</span></p><p><span style="font-size: small;">*&nbsp;</span><span style="font-family: \'comic sans ms\', sans-serif; font-size: small;">Tumble dry low</span></p><p><span style="font-size: small;">*&nbsp;</span><span style="font-family: \'comic sans ms\', sans-serif; font-size: small;">Do not bleach</span></p><p>&nbsp;<img src="http://bebebamboo.com/images/Footie%20washing%20symbol.jpg" alt="" width="152" height="43" /></p><p>&nbsp;</p><p class="MsoNormal" style="border: 0px; font-size: 13px; margin: 0px; padding: 6px 0px; color: #333333; font-family: Arial, Tahoma, Helvetica, sans-serif;"><span style="font-family: \'comic sans ms\', sans-serif; font-size: small;">Available size: 0-3m, 3-6m, 6-12m</span></p><p class="MsoNormal" style="border: 0px; font-size: 13px; margin: 0px; padding: 6px 0px; color: #333333; font-family: Arial, Tahoma, Helvetica, sans-serif;"><span style="font-family: \'comic sans ms\', sans-serif; font-size: small;">Wear Snug Fit, Not Flame Resistant&nbsp;</span></p><p class="MsoNormal" style="border: 0px; font-size: 13px; margin: 0px; padding: 6px 0px; color: #333333; font-family: Arial, Tahoma, Helvetica, sans-serif;"><span style="font-family: \'comic sans ms\', sans-serif; font-size: small;"><br /></span></p><p class="MsoNormal" style="border: 0px; font-size: 13px; margin: 0px; padding: 6px 0px; color: #333333; font-family: Arial, Tahoma, Helvetica, sans-serif;"><span style="font-family: \'comic sans ms\', sans-serif; font-size: small;">Footie measurement (cm)</span></p><p class="MsoNormal" style="border: 0px; font-size: 13px; margin: 0px; padding: 6px 0px; color: #333333; font-family: Arial, Tahoma, Helvetica, sans-serif;"><span style="font-family: \'comic sans ms\', sans-serif; font-size: small;"><img src="http://bebebamboo.com/images/Footie%20size.jpg" alt="" width="578" height="149" /></span></p>'}, 'Meta keywords': {4: nan, 5: nan}, 'Meta description': {4: nan, 5: nan}, 'Search words': {4: nan, 5: nan}, 'Page title': {4: nan, 5: nan}, 'Taxes': {4: nan, 5: nan}, 'Features': {4: nan, 5: nan}, 'Secondary categories': {4: 'Apparel/Footie with Foldover Mittens', 5: 'Apparel/Footie with Foldover Mittens'}, 'SEO name': {4: 'bamboo-baby-footie-with-fold-over-mitten-deer', 5: 'bamboo-baby-footie-with-fold-over-mitten-deer-clone'}, 'Short description': {4: nan, 5: nan}, 'Localizations': {4: nan, 5: nan}, 'Status': {4: 'A', 5: 'A'}, 'Product URL': {4: 'http://bebebamboo.com/bamboo-baby-footie-with-fold-over-mitten-deer.html', 5: 'http://bebebamboo.com/bamboo-baby-footie-with-fold-over-mitten-deer-clone.html'}, 'Image URL': {4: 'http://bebebamboo.com/images/thumbnails/1/420/420/Romper_Deer.jpg', 5: 'http://bebebamboo.com/images/thumbnails/1/420/420/Romper_Bear_Gray.jpg'}, 'Sale price': {4: '28', 5: '28'}, 'Product id': {4: '361', 5: '362'}, 'Out of stock actions': {4: 'N', 5: 'N'}, 'Items in box': {4: 'min:0;max:0', 5: 'min:0;max:0'}, 'Box size': {4: 'length:0;width:0;height:0', 5: 'length:0;width:0;height:0'}, 'Unnamed: 39': {4: nan, 5: nan}, 'Unnamed: 40': {4: nan, 5: nan}, 'Unnamed: 41': {4: nan, 5: nan}, 'Unnamed: 42': {4: nan, 5: nan}, 'Unnamed: 43': {4: nan, 5: nan}, 'Unnamed: 44': {4: nan, 5: nan}, 'Unnamed: 45': {4: nan, 5: nan}, 'Unnamed: 46': {4: nan, 5: nan}, 'Unnamed: 47': {4: nan, 5: nan}, 'Unnamed: 48': {4: nan, 5: nan}, 'Unnamed: 49': {4: nan, 5: nan}, 'Unnamed: 50': {4: nan, 5: nan}, 'Unnamed: 51': {4: nan, 5: nan}, 'Unnamed: 52': {4: nan, 5: nan}, 'Unnamed: 53': {4: nan, 5: nan}, 'Unnamed: 54': {4: nan, 5: nan}, 'Unnamed: 55': {4: nan, 5: nan}, 'Unnamed: 56': {4: nan, 5: nan}, 'Unnamed: 57': {4: nan, 5: nan}, 'Unnamed: 58': {4: nan, 5: nan}, 'Unnamed: 59': {4: nan, 5: nan}, 'Unnamed: 60': {4: nan, 5: nan}, 'Unnamed: 61': {4: nan, 5: nan}, 'Unnamed: 62': {4: nan, 5: nan}, 'Unnamed: 63': {4: nan, 5: nan}, 'Unnamed: 64': {4: nan, 5: nan}, 'Unnamed: 65': {4: nan, 5: nan}, 'Unnamed: 66': {4: nan, 5: nan}, 'Unnamed: 67': {4: nan, 5: nan}, 'Unnamed: 68': {4: nan, 5: nan}, 'Unnamed: 69': {4: nan, 5: nan}, 'Unnamed: 70': {4: nan, 5: nan}, 'Unnamed: 71': {4: nan, 5: nan}, 'Unnamed: 72': {4: nan, 5: nan}, 'Unnamed: 73': {4: nan, 5: nan}, 'Unnamed: 74': {4: nan, 5: nan}, 'Unnamed: 75': {4: nan, 5: nan}, 'Unnamed: 76': {4: nan, 5: nan}, 'Unnamed: 77': {4: nan, 5: nan}, 'Unnamed: 78': {4: nan, 5: nan}, 'Unnamed: 79': {4: nan, 5: nan}, 'Unnamed: 80': {4: nan, 5: nan}, 'Unnamed: 81': {4: nan, 5: nan}, 'Unnamed: 82': {4: nan, 5: nan}, 'Unnamed: 83': {4: nan, 5: nan}, 'Unnamed: 84': {4: nan, 5: nan}, 'Unnamed: 85': {4: nan, 5: nan}, 'Unnamed: 86': {4: nan, 5: nan}, 'Unnamed: 87': {4: nan, 5: nan}, 'Unnamed: 88': {4: nan, 5: nan}, 'Unnamed: 89': {4: nan, 5: nan}, 'Unnamed: 90': {4: nan, 5: nan}, 'Unnamed: 91': {4: nan, 5: nan}, 'Unnamed: 92': {4: nan, 5: nan}, 'Unnamed: 93': {4: nan, 5: nan}, 'Unnamed: 94': {4: nan, 5: nan}, 'Unnamed: 95': {4: nan, 5: nan}, 'Unnamed: 96': {4: nan, 5: nan}, 'Unnamed: 97': {4: nan, 5: nan}, 'Unnamed: 98': {4: nan, 5: nan}, 'Unnamed: 99': {4: nan, 5: nan}, 'Unnamed: 100': {4: nan, 5: nan}, 'Unnamed: 101': {4: nan, 5: nan}, 'Unnamed: 102': {4: nan, 5: nan}, 'Unnamed: 103': {4: nan, 5: nan}, 'Unnamed: 104': {4: nan, 5: nan}, 'Unnamed: 105': {4: nan, 5: nan}, 'Unnamed: 106': {4: nan, 5: nan}, 'Unnamed: 107': {4: nan, 5: nan}, 'Unnamed: 108': {4: nan, 5: nan}, 'Unnamed: 109': {4: nan, 5: nan}, 'Unnamed: 110': {4: nan, 5: nan}, 'Unnamed: 111': {4: nan, 5: nan}, 'Unnamed: 112': {4: nan, 5: nan}, 'Unnamed: 113': {4: nan, 5: nan}, 'Unnamed: 114': {4: nan, 5: nan}, 'Unnamed: 115': {4: nan, 5: nan}, 'Detailed image_y': {4: 'https://bebebamboo.com.sg/newshop/images/backup/detailed/Romper_Deer.jpg', 5: 'https://bebebamboo.com.sg/newshop/images/backup/detailed/Romper_Bear_Gray.jpg'}, 'image_urls': {4: 'https://bebebamboo.com.sg/newshop/images/backup/detailed/Romper_Deer.jpg', 5: 'https://bebebamboo.com.sg/newshop/images/backup/detailed/Romper_Bear_Gray.jpg'}, 'Options': {4: '6-12m', 5: '3-6m'}, 'item_group_id': {4: 'BBFTDR', 5: 'BBFTPBG'}}

{Product code'：{4:'BBFTDR-6-12m'，5:'BBFTPBG-3-6m'，Category'：{4:'Apparel'，5:'Apparel'，价目表：{4:'28'，5:'28'，价格：{4:'28'，重量：{4:'0'，5:'0'，数量：{4:'1'，5:'1'，最小数量：{4:'0'，5:'0'，运费：{4:'0'，5:'0'，日期加上：{4:'0:'7:00''，可下载：{4:N'，5:N'}，'文件：{4:nan，5:nan}，'发货可下载：{4:N'，5:N'}，'库存跟踪：{4:O'，5:O'}，'免费发货：{4:N'，5:N'}，'功能比较：{4:N'，5:N'}，'零价格操作：{4:P'，5:P'}，'缩略图：{4:nan，5:nan'}，'详细图像(x:{4: 'https://bebebamboo.com.sg/newshop/images/backup/detailed/Romper_Deer.jpg', 5: 'https://bebebamboo.com.sg/newshop/images/backup/detailed/Romper_Bear_Gray.jpg“}，'产品名称'：{4:'带折叠连指手套的竹子婴儿鞋-鹿'，5:'带折叠连指手套的竹子婴儿鞋-北极熊灰色'，'说明'：{4:'
Bebe竹制基本系列。简单而时尚。这款连身裤内置折叠手套。
-极其柔软、细腻和光滑。
-促进舒适和宁静的睡眠。
成分：70%竹粘胶，30%棉
（Oeko-Tex标准100）
“style=”border:0px；font size:13px；margin:0px；padding:6px 0px；color:”333333；font-family:Arial，塔荷马，赫尔维蒂卡，无衬线；“>洗涤说明：
*冷水机洗或手洗
*由内而外洗涤和熨烫
可用大小：0-3m，3-6m，6-12m
穿着贴身，不阻燃”

Footie measurement（cm）
-极其柔软、细腻、光滑。
-促进舒适和宁静的睡眠。
成分：70%竹粘胶，30%棉
（Oeko-Tex标准100）
style=“border:0px；font size:13px；margin:0px；padding:6px 0px；color:#333333；字体系列：Arial，Tahoma，He