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import pandas as pd d = {'one' : pd.Series([1, 2, 3], index=['a', 'b', 'c']), 'two' : pd.Series([1, 2, 3, 4], index=['a', 'b', 'c', 'd'])} df = pd.DataFrame(d) #向现有的DataFrame添加一个新列 print ("Adding a new column by passing as Series:") df['three']=pd.Series([10,20,30],index=['a','b','c']) print(df) print ("Adding a new column using the existing columns in DataFrame:") df['four']=df['one']+df['three'] print(df)
运行结果 :
正在执行...
