第 25 行 SyntaxError: 'await' 函数外部 Pyscript

Question

I was given a task to build a project that perform linear regression prediction using PyScript so I utilized scikit-learn with help of Javascript and panel in order to do that.我的任务是构建一个使用 PyScript 执行线性回归预测的项目，所以我在 Javascript 和面板的帮助下使用了 scikit-learn 来做到这一点。 Here's my full code:这是我的完整代码：

<!DOCTYPE html>
<html lang="en">
<head>

    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Linear Regression Predict</title>
    <link rel="stylesheet" href="https://pyscript.net/alpha/pyscript.css"/>
    <script defer src="https://pyscript.net/alpha/pyscript.js"></script>

    <script type="text/javascript" src="https://cdn.jsdelivr.net/npm/vega@5"></script>
    <script type="text/javascript" src="https://cdn.jsdelivr.net/npm/vega-lite@5"></script>
    <script type="text/javascript" src="https://cdn.jsdelivr.net/npm/vega-embed@6"></script>
    <script type="text/javascript" src="https://unpkg.com/tabulator-tables@4.9.3/dist/js/tabulator.js"></script>
    <script type="text/javascript" src="https://cdn.bokeh.org/bokeh/release/bokeh-2.4.2.js"></script>
    <script type="text/javascript" src="https://cdn.bokeh.org/bokeh/release/bokeh-widgets-2.4.2.min.js"></script>
    <script type="text/javascript" src="https://cdn.bokeh.org/bokeh/release/bokeh-tables-2.4.2.min.js"></script>
    <script type="text/javascript" src="https://unpkg.com/@holoviz/panel@0.13.0/dist/panel.min.js"></script>
    <script type="text/javascript">
      Bokeh.set_log_level("info");
        </script>

    <py-env>
        - numpy 
        - pandas
        - scikit-learn
        - panel==0.13.1a2
    </py-env>

</head>
<body style="background-color:rgb(255, 255, 255)">
    <h1>Upload CSV</h1>

      <div id="fileinput"></div>
      <div id="upload"></div>
      <div id="to_prdict"></div>
      <div id="op"></div>

      <p id="regression-op"></p>

    <py-script>

import pandas as pd 
from sklearn.linear_model import LinearRegression
from sklearn.model_selection import train_test_split
from panel.io.pyodide import show
import numpy as np
import panel as pn

fileInput = pn.widgets.FileInput(accept=".csv")
uploadButton = pn.widgets.Button(name="Show Prediction",button_type='primary')
to_pred = pn.widgets.Spinner(name="Total Installs",value=500,step=50,start=50)

def process_file(event):
    if fileInput.value is not None:
      data = pd.read_csv(io.BytesIO(fileInput.value))
      x = data[['High']]
      y = data[['Volume']]
    
      lr = LinearRegression()
      lr.fit(x,y)
      y_hat = lr.predict(np.array(to_pred.value).reshape(1,-1))
      
      reg_op = Element('regression-op')
      reg_op.write(y_hat)

await show(fileInput,'fileinput')
await show(uploadButton,'upload')
await show(to_pred,'to_predict')
uploadButton.on_click(process_file)
        
    </py-script>
</body>
</html>

When I checks the website this error displays:当我检查网站时，会显示此错误：

JsException(PythonError: Traceback (most recent call last): File "/lib/python3.10/site-packages/_pyodide/_base.py", line 428, in eval_code .compile() File "/lib/python3.10/site-packages/_pyodide/_base.py", line 249, in compile self._gen.send(self.ast) File "/lib/python3.10/site-packages/_pyodide/_base.py", line 158, in _parse_and_compile_gen return compile(mod, filename, mode, flags=flags) File "", line 25 SyntaxError: 'await' outside function )

I'm not sure what to cause this error because I see no error in my syntax.我不确定是什么导致了这个错误，因为我的语法没有错误。

Answer 1

Your have multiple problems with your code.您的代码有多个问题。

1) Import asyncio 1）导入异步

This package is required for PyScript applications that use async functions.使用异步函数的 PyScript 应用程序需要此包。

import asyncio

2) Calling Async functions 2) 调用异步函数

Your code is using the await with in a function that is not declared async.您的代码在未声明为异步的函数中使用了 await。 Change your code:更改您的代码：

async def init():
        uploadButton.on_click(process_file)
        await show(fileInput,'fileinput')
        await show(uploadButton,'upload')
        await show(to_pred,'to_predict')

init()

3) Undefined element 3) 未定义元素

Your code is referencing an undefined element to_predict .您的代码引用了一个未定义的元素to_predict 。 I am not sure that that is, but you will need to add that element to your code.我不确定那是，但您需要将该元素添加到您的代码中。

await show(to_pred,'to_predict')

第 25 行 SyntaxError: 'await' 函数外部 Pyscript

问题描述

1 个解决方案

解决方案1
1 已采纳 2022-06-05 18:51:28

第 25 行 SyntaxError: &#39;await&#39; 函数外部 Pyscript

问题描述

1 个解决方案

解决方案1 1 已采纳 2022-06-05 18:51:28

第 25 行 SyntaxError: 'await' 函数外部 Pyscript

解决方案1
1 已采纳 2022-06-05 18:51:28