如何在flask中运行父函数? [英] How do I run the parent function in flask?

问题描述

我正在烧瓶中通过根请求接受一些数据，然后根据这些数据创建PDF.

I am accepting some data via post request on my root URL in flask and then create the PDF from that data.

在运行父函数之前，我无法生成PDF，该父函数随后使数据可用于pdf.

I can't generate PDF until I run the parent function which then makes the data available for pdf.

如何通过子功能运行父功能.

How do I run the parent function via child function.

@app.route('/', methods=['POST','GET'])
def process_data():
    #Some code to get the POST data
    x = int(user_input)
    y = 5
    z = x+y
    return z

@app.route('/download')
def download(args=process_data):
    a = z+2
    return a

您可以看到，我继承了 download 函数中的 process_data 函数.如果我直接转到/download ，则会收到 undefined x variable 错误.

You can see, I've inherited the process_data function in download function. If I directly go to /download I get undefined x variable error.

我不想一次又一次地运行整个功能.我只需要一些在process_data函数中已处理过的变量即可.

I don't want to run the whole function again and again. I just need some variables that has been processed in process_data function.

我该如何解决?

推荐答案

不需要每个函数都是视图函数！

There is no need that every function is a view function!

如果我正确理解了您的用例，则用户发送数据，然后返回pdf.

If I understood your use case correctly, the user sends data, and you return a pdf.

您可以这样做(伪代码):

You can do it like this (pseudo code):

def process_data(data):
    x = int(data)
    y = 5
    z = x+y
    return z


def generate_pdf(data):
    #Some code to generate a pdf
    return pdf(data)


@app.route('/download', methods=['POST','GET'])
def download_pdf():
    #Some code to get the POST data
    processed_data = process_data(data)
    pdf = generate_pdf(pdf)
    return pdf

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