python - 如何从Colab中从上传的csv提取的数据框中的前一行减去前一行？(How to subtract row from previous row in dataframe extracted from uploaded csv in Colab?)

Question

After uploading csv file from local drive and wrapping it with stringIO,I used pd.read_csv to convert it into dataframe.

(从本地驱动器上传csv文件并用stringIO包装后，我使用pd.read_csv将其转换为数据帧。)

But unable to subtract a row from previous row.

(但是无法从上一行减去一行。)

It shows TypeError: unsupported operand type(s) for -: 'str' and 'str'

(它显示TypeError：-的不支持的操作数类型：“ str”和“ str”)

import pandas as pd
from google.colab import files
uploaded1= files.upload()
import io
df1= pd.read_csv(io.StringIO(uploaded1['sbi.csv'].decode('utf-8')))
df1.diff()
TypeError: unsupported operand type(s) for -: 'str' and 'str'

  ask by Animal translate from so

Answer 1

等待大神答复