本文总结了两种方法：全局变量和类方法
1、全局变量
示例代码：
from flask import Flask, render_template
app = Flask(__name__)
ret = []
@app.route("/index")
def index():
s = "I love you!"
t = "Me Too!"
global ret
ret.append(s)
ret.append(t)
return render_template("index.html", m=ret)
@app.route("/index2")
def index2():
global ret
return render_template("index2.html", n=ret)
if __name__ == "__main__":
app.run(debug=True)
index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>flask框架</title>
</head>
<body>
{{ m }}
</body>
</html>index2.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>flask框架2</title>
</head>
<body>
{{ n }}
</body>
</html>运行效果：
?
2、类方法
示例代码：
from flask import Flask, render_template
app = Flask(__name__)
class DataBase(object):
x = None
y = None
z = None
data = DataBase()
@app.route("/index")
def index():
s = "I love you!"
t = "Me Too!"
m = s + t
data.x = s * 3
data.y = t * 2
return render_template("index.html", m=m)
@app.route("/index2")
def index2():
n = data.x + data.y
return render_template("index2.html", n=n)
if __name__ == "__main__":
app.run(debug=True)
index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>flask框架</title>
</head>
<body>
{{ m }}
</body>
</html>index2.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>flask框架2</title>
</head>
<body>
{{ n }}
</body>
</html>运行效果：
?
注意事项：
步骤1.创建一个名为“ templates”的新文件夹
步骤2.将“ index.html”移动到“ templates”文件夹中
步骤3.在索引函数中，返回render_template（'index.html'，m?= m）
