format 函数没有看懂

luofeiyu_cu 发表于 2014-08-18 20:21

from flask import Flask, request, redirect, url_for

app = Flask(__name__)

@app.route('/')
def index():
return redirect(url_for('username'), code=302) # URL跳转，默认代码是302，可以省略

@app.route('/username', methods=['GET', 'POST'])
def username():
HTML = '''<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8"/>
<title>Flask POST方法演示</title>
</head>
<body>
{}
<form action="" method="POST">
<input type="text" name="username" value="" />
<input type="submit" name="enter" value="enter" />
</form>

</body>
</html>'''
if request.method == 'GET':
   return HTML.format('')
elif request.method == 'POST':
   if request.form['username']:
         return HTML.format('<p>Your name is <strong>{}</strong></p>'.format(request.form['username']))
   else:
         return redirect(url_for('username'))

if __name__ == '__main__':
app.run(debug=True, host='127.0.0.1', port=8080)

这段代码唯一不懂的地方是：HTML.format('<p>Your name is <strong>{}</strong></p>'.format(request.form['username']))

s='haha'
>>> s.format('<p>Your name is <strong>{}</strong></p>'.format('username'))
'haha'

请问，HTML.format('<p>Your name is <strong>{}</strong></p>'.format(request.form['username'])) 究竟是要干什么？

ssfjhh 发表于 2014-08-20 21:04

Fancier Output Formatting

页: [1]

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format 函数没有看懂