Flask：如何将数据从python脚本发送到HTML

Question

我有一个返回列表的python脚本，我想将这些数据发送到HTML以构建适当的模板。

script.py：

def database():
 try:
  conn = psycopg2.connect("dbname='DataTeste' user='user1' host='localhost' password='123'")
 except:
  return "Impossible to connect to the database, check your code."

 cur = conn.cursor()
 conn.set_client_encoding('LATIN1')
 cur.execute("SELECT * FROM customers") 
 rows = cur.fetchall()

 return rows

现在我想在某个模板中收到此脚本。任何人都可以帮助我吗？

Answer 1

您应该查看http://jinja.pocoo.org/docs/2.10/文档。这很简单。

以下是如何做到的。

Python文件

from flask import render_template
@app.route("/")
def index():
    list_object = ["Hey", "How", "Are", "You"]
    return render_template("index.html", list_to_send=list_object)

HTML文件“index.html”

将其放入body标记。

{% for element in list_to_send%}
    <p>{{element}}</p>
{% endfor %}

Answer 2

你想要这样的东西：

script.py

def database():
 try:
  conn = psycopg2.connect("dbname='DataTeste' user='user1' host='localhost' password='123'")
 except:
  return "Impossible to connect to the database, check your code."

 cur = conn.cursor()
 conn.set_client_encoding('LATIN1')
 cur.execute("SELECT * FROM customers") 
 rows = cur.fetchall()

 return rows

index.py

from flask import render_template
from script import database

@app.route("/")
def index():
    to_send=database()
    return render_template("index.html", to_send=to_send)

的index.html

{%for i in to_send%}
<p> {{i[0]}}</p>
{%endfor%}