Hi, @lijunyi2!

Welcome to the Vercel Community

I don't see any issues with your vercel.json file. Do you have any other configuration files e.g. requirements.txt?

Some things I would try:

• Removing the runtime on your .json all together. You don't necessarily need to specify the version as by default, new projects will use the latest Python version available on Vercel.

• Specifying the version in a Pipfile. From the relevant documentation:

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[[source]]
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url = "https://pypi.org/simple"
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verify_ssl = true
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name = "pypi"
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[packages]
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flask = "*"
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[requires]
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python_version = "3.12"

I'll also leave some examples of some Python projects that might be helpful to look at.

https://github.com/vercel/examples/tree/main/python

GitHub

examples/python at main · vercel/examples

Enjoy our curated collection of examples and solutions. Use these patterns to build your own robust and scalable applications. - vercel/examples

My requirements.txt content is as follows：

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Flask==3.0.3
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Flask-Cors==3.0.10
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gunicorn==20.1.0

my app.py content is as follows：

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from flask import Flask, request, jsonify
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from flask_cors import CORS
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import poplib
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from email.parser import BytesParser
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import re
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import time
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app = Flask(__name__)
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CORS(app)
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@app.route('/', methods=['POST'])
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def home():
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    return jsonify({"msg": "test",
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                    "data": "test"}), 200

The structure of my project is as follows：

So how can I modify my configuration to solve this deployment problem?

I solved it myself, thank you.

Great to hear, @lijunyi2! Could you share your solution?

The file directory is like this：

the vercel.json is like this:

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{
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  "rewrites": [
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    { "source": "/(.*)", "destination": "/api/index" }
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  ],
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  "functions": {
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    "api/*.py": {
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      "maxDuration": 60
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    }
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  }
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}

/api/index, index is your file name。

I solved the python project, but the nodejs project is different from this. Do you have an example of how to set maxDuration in nodejs?