Python Flask Web
谈琦
3.2向模板传递参数：
index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>这是首页</title>
<h>这是首页中文字</h>
</head>
<body>
</body>
</html>
user.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>这是用户中心</title>
<h>欢迎您：{{ name }}</h><br>
<h>欢迎您：{{ name }}</h><br>
<h>欢迎您：{{ name }}</h><br>
<h>欢迎您：{{ name }}</h><br>
<h>欢迎您：{{ name }}</h><br>
<h>欢迎您：{{ name }}</h><br>
<h>欢迎您：{{ name }}</h><br>
<h>欢迎您：{{ name }}</h><br>
<h>欢迎您：{{ name }}</h><br>
<h>欢迎您：{{ name }}</h><br>
<h>欢迎您：{{ name }}</h><br>
<h>欢迎您：{{ name }}</h><br>
</head>
<body>
</body>
</html>
app.py
#encoding:utf-8
from flask import Flask
from flask import render_template
app = Flask(__name__)
@app.route('/')
def index():
return render_template('index.html')
@app.route('/user/<username>')
def user(username):
return render_template('user.html', name=username)
if __name__ == '__main__':
app.run(debug=True)
以键值对传递变量
index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>这是首页</title>
<h1>这是首页中文字</h1>
</head>
<body>
{{ var1 }}<br>
{{ var2 }}
</body>
</html>
多个变量值传递给模板
app.py
#encoding:utf-8
from flask import Flask
from flask import render_template
app = Flask(__name__)
@app.route('/')
def index():
title = '**locals()'
author = 'k0sec'
return render_template('index.html', **locals())
@app.route('/user/<username>')
def user(username):
return render_template('user.html', name=username)
if __name__ == '__main__':
app.run(debug=True)
index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>这是首页</title>
<h1>这是首页中文字</h1>
</head>
<body>
{{ title }}<br>
{{ author }}
</body>
</html>
3.3模板中的控制语句之if语句
if语句使用实例
index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
{% if name %}
<h1>产生的随机数有效</h1>
{% else %}
<h1>产生的随机数无效！</h1>
{% endif %}
</body>
</html>
app.py
#encoding:utf-8
from flask import Flask
from flask import render_template
import random
app = Flask(__name__)
@app.route('/')
def hello_world():
rand1 = random.randint(0, 1)
return render_template('index.html', name=rand1)
if __name__ == '__main__':
app.run(debug=True)
if…elif语句使用实例
index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
{% if name==1 %}
<h1>恭喜，您抽中了一等奖</h1>
{% elif name==2 %}
<h1>恭喜，您抽中了二等奖</h1>
{% else %}
<h1>恭喜，您抽中了三等奖</h1>
{% endif %}
{{ name }}
</body>
</html>
app.py
#encoding:utf-8
from flask import Flask
from flask import render_template
import random
app = Flask(__name__)
@app.route('/')
def hello_world():
rand1 = random.randint(1, 3)
return render_template('index.html', name=rand1)
if __name__ == '__main__':
app.run(debug=True)
3.4模板中的控制语句之for语句
shop.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<table>
<thead>
<th>商品名称</th>
<th>商品价格</th>
</thead>
<tbody>
<meta charset="UTF-8">
{% for goods in goods %}
<tr>
<td>{{ goods.name }}</td>
<td>{{ goods.price }}</td>
</tr>
{% endfor %}
</tbody>
</table>
</body>
</html>
app.py
#encoding:utf-8
from flask import Flask
from flask import render_template
app = Flask(__name__)
@app.route('/')
def hello_world():
goods=[{'name': '怪味少女开衫外套春秋韩版学生bf原宿宽松运动风2019新款秋装上衣', 'price': '138'},
{'name': 'A7seven复古百搭牛仔外套女秋季2019新款宽松显瘦休闲夹克衫上衣', 'price': '100'},
{'name': '黑色时尚西装外套女春秋中长款2019新款韩版休闲薄款上衣', 'price': '129'}]
return render_template('shop.html', **locals())
if __name__ == '__main__':
app.run(debug=True)
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