从JS调用python函数 [英] Call python function from JS
问题描述
我试图从我的JavaScript代码中调用Python中的函数。我使用了此处解释的代码，但它对我不起作用。
I am trying to call a function in Python from my JavaScript code. I used the code explained here but it does not work for me.
这是我的JS代码：
<!DOCTYPE html>
<body>
<script type="text/javascript" src="d3/d3.js"></script>
<script type="text/javascript" src="http://code.jquery.com/jquery-2.1.4.min.js"></script>
<script>
text ="xx";
$.ajax({
type: "POST",
url: "~/reverse_pca.py",
data: { param: text}
}).done(function(o) {
console.log(data);
console.log(text);
});
Python代码：
import csv
from numpy import genfromtxt
from numpy import matrix
def main():
...
return x
if __name__ == "__main__":
x=main()
return x;
你知道它有什么问题吗？
Do you know what is wrong with it?
推荐答案
除了上述要点之外，假设您已经有适当的设置来提供python脚本并返回响应。你应该提交一个异步请求，特别是如果python代码做了一些繁重的计算。
Apart from the mentioned points and assuming you already have a proper setup to serve your python script and return the response. You should submit an asynchronous request, especially if the python code does some heavy computation.
function postData(input) {
$.ajax({
type: "POST",
url: "/reverse_pca.py",
data: { param: input },
success: callbackFunc
});
}
function callbackFunc(response) {
// do something with the response
console.log(response);
}
postData('data to process');
如果您只进行一些轻量级计算，并且从jQuery 1.8开始不使用代码就没有问题，采用同步方法。这是不推荐，因为它会阻止主线程。
If you only do some light computation and you have no problem working with a code deprecated as of jQuery 1.8, go with the synchronous approach. This is not recommended as it blocks the main thread.
function runPyScript(input){
var jqXHR = $.ajax({
type: "POST",
url: "/reverse_pca.py",
async: false,
data: { param: input }
});
return jqXHR.responseText;
}
// do something with the response
response= runPyScript('data to process');
console.log(response);
在此处阅读更多相关信息：如何从异步调用中返回响应？和 http://api.jquery.com/jquery.ajax/
Read more about it here: How do I return the response from an asynchronous call? and http://api.jquery.com/jquery.ajax/
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