应用大写到 Python 中的 Pandas 数据表的一列中
在本教程中,我们将了解如何将数据表中的姓名列转为大写。让我们来看看实现我们的目标的不同方法。
示例
我们可以通过使用 upper() 方法将其转为大写,从而将一列分配给数据表。
让我们来看看代码。
# importing the pandas package import pandas as pd # data for DataFrame data = { 'Name': ['Hafeez', 'Aslan', 'Kareem'], 'Age': [19, 21, 18], 'Profession': ['Developer', 'Engineer', 'Artist'] } # creating DataFrame data_frame = pd.DataFrame(data) # displaying the DataFrame print('---------------------Before-------------------') print(data_frame) print() # making the Name column strings to upper case data_frame['Name'] = data_frame['Name'].str.upper() # displaying the DataFrame print('---------------------After-------------------') print(data_frame)
输出
如果你运行以上程序,你将获得以下结果。
---------------------Before------------------- Name Age Profession 0 Hafeez 19 Developer 1 Aslan 21 Engineer 2 Kareem 18 Artist ---------------------After------------------- Name Age Profession 0 HAFEEZ 19 Developer 1 ASLAN 21 Engineer 2 KAREEM 18 Artist
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示例
我们还可以使用数据表的 apply() 方法来实现相同的事情。让我们看看相关的代码。
# importing the pandas package import pandas as pd # data for DataFrame data = { 'Name': ['Hafeez', 'Aslan', 'Kareem'], 'Age': [19, 21, 18], 'Profession': ['Developer', 'Engineer', 'Artist'] } # creating DataFrame data_frame = pd.DataFrame(data) # displaying the DataFrame print('---------------------Before-------------------') print(data_frame) print() # making the Name column strings to upper case data_frame['Name'] = data_frame['Name'].apply(lambda name : name.upper()) # displaying the DataFrame print('---------------------After-------------------') print(data_frame)
输出
如果你运行以上程序,你将获得以下结果。
---------------------Before------------------- Name Age Profession 0 Hafeez 19 Developer 1 Aslan 21 Engineer 2 Kareem 18 Artist ---------------------After------------------- Name Age Profession 0 HAFEEZ 19 Developer 1 ASLAN 21 Engineer 2 KAREEM 18 Artist
结论
我希望你从本教程中学到了东西。如果你对本教程有任何疑问,请在评论部分提问。
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