示例
（index.html）
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<form method="POST">
<textarea name="text"></textarea>
<input type="submit" value="提交">
</form>
<!--{{text|safe}}-->
{{text}}
</body>
</html>
# _*_ coding:utf-8 _*_
from flask import Flask, render_template, request
app = Flask(__name__)
@app.route("/form", methods=["GET", "POST"])
def form():
text = ""
if request.method == "POST":
text = request.form.get("text")
return render_template("index.html", text=text)
if __name__ == '__main__':
app.run(debug=True)
测试
