方法一

在Markdown单元格添加下载链接

<a href="your_file_name.csv"> Download File </a>
# import the modules we'll need
from IPython.display import HTML
import pandas as pd
import numpy as np
import base64
# function that takes in a dataframe and creates a text link to  
# download it (will only work for files < 2MB or so)
def create_download_link(df, title = "Download CSV file", filename = "data.csv"):  
    csv = df.to_csv()
    b64 = base64.b64encode(csv.encode())
    payload = b64.decode()
    html = '<a download="{filename}" href="data:text/csv;base64,{payload}" target="_blank">{title}</a>'
    html = html.format(payload=payload,title=title,filename=filename)
    return HTML(html)
# create a random sample dataframe
df = pd.DataFrame(np.random.randn(50, 4), columns=list('ABCD'))