Python DataFrame の行 or 列 を元に行った演算結果を、DataFrameに列追加 or 行追加して格納する際に使えるメソッドいろいろ - Qiita>>> >>> import pandas as pd >>> >>> data_dict = {'A':[100, 564, 347], 'B':[1200, 853, 139]} >>> df = pd.DataFrame(data_dict) >>> >>> print(type(df)) <class 'pandas.core.frame.DataFrame'> >>> >>> print(df) A B 0 100 1200 1 564 853 2 347 139 >>> >>> print(df['A']) 0 100 1 564 2 347 Name: A, dtype: int64 >>> >>> print(df['B']) 0 1200 1 853 2 139 Name: B, dtype: int64 >>> >>> df['A * B + 2*A'] = df['A
