为啥我的 python pandas 数据框剥离方法不适用于尾随空格？我该如何解决？

Posted 2023-03-06

【中文标题】为啥我的 python pandas 数据框剥离方法不适用于尾随空格？我该如何解决？

【英文标题】：why doesn't my python pandas dataframe strip method work for trailing whitespace? and how do I fix it?为什么我的 python pandas 数据框剥离方法不适用于尾随空格？我该如何解决？

【发布时间】：2022-01-22 05:28:37

【问题描述】：

我有这段代码可以从数据框中去除空格

# create a dataframe with 3 columns
dataFrame = pd.DataFrame(
   'Product Category': [' Computer', ' Mobile Phone', 'Electronics ', 'Appliances', ' Furniture', 'Stationery'],'Product Name': ['Keyboard', 'Charger', ' SmartTV', 'Refrigerators', ' Chairs', 'Diaries'],'Quantity': [10, 50, 10, 20, 25, 50])

print ("Dataframe before removing whitespaces...\n",dataFrame)

# removing whitespace from more than 1 column
dataFrame['Product Category'].str.strip()
dataFrame['Product Name'].str.strip()

# dataframe
print ("Dataframe after removing whitespaces...\n",dataFrame)

删除空格之前的数据框...

 Product Category   Product Name  Quantity
0         Computer       Keyboard        10
1     Mobile Phone        Charger        50
2     Electronics         SmartTV        10
3       Appliances  Refrigerators        20
4        Furniture         Chairs        25
5       Stationery        Diaries        50

删除空格后的数据框...

   Product Category   Product Name  Quantity
0         Computer       Keyboard        10
1     Mobile Phone        Charger        50
2     Electronics         SmartTV        10
3       Appliances  Refrigerators        20
4        Furniture         Chairs        25
5       Stationery        Diaries        50

“Electronics”之后的空格不会被删除。有什么想法可以解决这个问题吗？

【问题讨论】：

您需要将其重新分配回列:) 即dataFrame['Product Category'] = dataFrame['Product Category'].str.strip()

【参考方案1】：

正如 Umar 所说，你需要做这样的事情：

# create a dataframe with 3 columns
dataFrame = pd.DataFrame(
   'Product Category': [' Computer', ' Mobile Phone', 'Electronics ', 'Appliances', ' Furniture', 'Stationery'],'Product Name': ['Keyboard', 'Charger', ' SmartTV', 'Refrigerators', ' Chairs', 'Diaries'],'Quantity': [10, 50, 10, 20, 25, 50])

print ("Dataframe before removing whitespaces...\n",dataFrame)

# removing whitespace from more than 1 column
dataFrame['Product Category'] = dataFrame['Product Category'].str.strip()
dataFrame['Product Name'] = dataFrame['Product Name'].str.strip()

# dataframe
print ("Dataframe after removing whitespaces...\n",dataFrame)