Python，Dash - 点击下载生成的 Excel 文件

Question

我正在尝试制作一个 Dash 应用程序，让用户下载通过以下函数生成的 Excel：

def Create_Excel(perfume_name):

   workbook = xlsxwriter.Workbook(r'D:\Perfumes\' + perfume_name + ".xlsx")
   worksheet = workbook.add_worksheet()

   worksheet.write('A1', 'Perfume')
   worksheet.write('B1', 'Preços(€)')
   worksheet.write('C1', 'Link')
   worksheet.write('D1', 'Disponibilidade (caso possível)')
   worksheet.write('E1', 'OLX Local')
   worksheet.write('F1', 'ML')

   workbook.close()

def main():
   perfume = input()
   Create_Excel(perfume)

我有以下适用于静态文件路径的代码：

import dash
import pandas as pd
from dash import html as html
from dash.dependencies import Output, Input
from dash_extensions import Download
from dash_extensions.snippets import send_bytes
from Excel import *

app = dash.Dash(prevent_initial_callbacks=True)
app.layout = html.Div([html.Button("Download xlsx", id="btn"), Download(id="download")])



Create_Excel('Teste')
df = pd.read_excel(r'D:\Perfumes\Teste.xlsx')


@app.callback(Output("download", "data"), [Input("btn", "n_clicks")])
def generate_xlsx(excel):

    def to_xlsx(bytes_io):
        xslx_writer = pd.ExcelWriter(bytes_io, engine="xlsxwriter")
        df.to_excel(xslx_writer, index=False, sheet_name="sheet1")
        xslx_writer.save()

    return send_bytes(to_xlsx, "Download_Perfume.xlsx")


if __name__ == '__main__':
    app.run_server()

这有效，但我想与其他人分享该应用程序。

objective是用户点击按钮要求香水输入，然后生成excel文件下载。所以文件路径是可变的，香水输入也会改变。

谢谢！

Answer 1

你可以有 2 个输入来动态获取你想要的值，还有一个提交按钮来为你的生成函数处理这些输入，所以像这样的模板：

app.layout = html.Div(children=[
    dcc.Input(id="input_1"),
    dcc.Input(id="input_2"),
    html.Button('Submit', id='submit-val'),
    dbc.Label(id="result")
])

@app.callback(
    Output("result", "children"),
    [
        Input("submit-val", "n_clicks"),
    ],
    [
        State("input_1", "value"),
        State("input_2", "value")
    ], prevent_initial_call=True
)
def get_inputs(_, input_1, input_2):
    return f"{input_1}, {input_2}"

Python，Dash - 点击下载生成的 Excel 文件

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