app.py
from flask import Flask, render_template
app = Flask(__name__)
@app.route('/')
def hello_world():
url_str = 'https://www.baidu.com'
my_list = [11, 22, 33, 44, 55]
my_dict = {
'name': 'James',
'age': 36
}
my_int = 18
return render_template('index.html', url_str=url_str, my_list=my_list, my_dict=my_dict, my_int=my_int)
if __name__ == '__main__':
app.run(host='192.168.235.128', port=5000, debug=True)
index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<h1>学习了</h1> <br>
{
# 一个变量代码块的使用 #}
{
{
url_str }} <br>
{
# 列表的使用 #}
{
{
my_list }} <br>
{
{
my_list.2 }} <br>
{
{
my_list[2] }} <br>
{
# 字典的使用 #}
{
{
my_dict }} <br>
{
{
my_dict.name }} <br>
{
{
my_dict['name'] }} <br>
{
{
my_int }} <br>
{
# for循环的使用，可以先敲for，然后按住tab进行补全#}
{
% for num in my_list %}
{
{
num }} <br>
{
% if num>50 %}
{
{
'大数字' }}
{
% endif %}
{
% endfor %}
<hr>
{
# 过滤器 #}
{
# 字符串变大写 #}
{
{
url_str | upper }} <br>
{
# 字符串反转 #}
{
{
url_str | reverse }} <br>
{
# 字符串链式调用 #}
{
{
url_str | upper | reverse | lower}} <br>
</body>
</html>
Run results:
commonly used filters:
- abs: absolute value
- default: If the current variable has no value, the value in the parameter will be used instead
- escape: escape character
- first: returns the first element of a sequence
- format: format string
- last: returns the last element of a sequence
- length: returns the length of a sequence
- join: concatenate strings
- safe: turn off escaping
- int: converted to int type
- float: convert to floating point type
- lower: convert to lowercase
- upper: convert to thank you
- replace: replace
- truncate: intercept a string of length length
- striptags: delete all html tags in the string, if there are multiple spaces, they will be replaced with one space