Pythonのお勉強 Part54 - 暇つぶし2ch

Pythonのお勉強 Part5 ..

632:apple strawberry,3,30,mango""" >>> >>> print(csv_raw_data) hoge,1,10,fuga apple,2,20,pineapple strawberry,3,30,mango >>> >>> csv_data = [[int(col) if col.isdigit() else col for col in row.split(',')] for row in csv_raw_data.split('\n')] #数字の文字列はintに変換して2次元リスト化 >>> csv_data [['hoge', 1, 10, 'fuga'], ['apple', 2, 20, 'pineapple'], ['strawberry', 3, 30, 'mango']] >>> >>> [row[1] for row in csv_data] #2列目のデータ抜き出し [1, 2, 3] >>> >>> new_col_1 = [111,112,113] #2列目のNEWデータ >>> new_csv_data = [[new_col_1[row_idx] if col_idx==1 else col_data for col_idx, col_data in enumerate(row_data)] for row_idx, row_data in enumerate(csv_data)] >>> new_csv_data [['hoge', 111, 10, 'fuga'], ['apple', 112, 20, 'pineapple'], ['strawberry', 113, 30, 'mango']] >>> >>> new_csv_raw_data = '\n'.join([','.join([str(col) for col in row]) for row in new_csv_data]) #intはstrに変換して文字列化 >>> print(new_csv_raw_data) hoge,111,10,fuga apple,112,20,pineapple strawberry,113,30,mango >>>

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