note

# 16.6
import hashlib

def calc_md5(password):
    md5 = hashlib.md5()
    md5.update(password.encode('utf-8'))
    return md5.hexdigest()

db = {
    'michael': 'e10adc3949ba59abbe56e057f20f883e',
    'bob': '878ef96e86145580c38c87f0410ad153',
    'alice': '99b1c2188db85afee403b1536010c2c9'
}

def login(user, password):
    if calc_md5(password) == db[user]:
        return True
    else:
        return False

# 测试:
assert login('michael', '123456')
assert login('bob', 'abc999')
assert login('alice', 'alice2008')
assert not login('michael', '1234567')
assert not login('bob', '123456')
assert not login('alice', 'Alice2008')
print('ok')

# 16.6_2
import hashlib, random

def get_md5_(text):
    md5 = hashlib.md5()
    md5.update(text.encode('utf-8'))
    return md5.hexdigest()

db = {}

def register(username, password):
    db[username] = get_md5(password+username+'the-Salt')


class User(object):
    def __init__(self, username, password):
        self.username = username
        self.salt = ''.join([chr(random.randint(48, 122)) for i in range(20)])
        self.password = get_md5_(password + self.salt)

db = {
    'michael': User('michael', '123456'),
    'bob': User('bob', 'abc999'),
    'alice': User('alice', 'alice2008')
}

def get_md5(user, pws):
    return get_md5_(text=pws+user.salt)

def login(username, password):
    user = db[username]
    return user.password == get_md5(user, pws=password)

# 测试:
assert login('michael', '123456')
assert login('bob', 'abc999')
assert login('alice', 'alice2008')
assert not login('michael', '1234567')
assert not login('bob', '123456')
assert not login('alice', 'Alice2008')
print('ok')

# 天气获取
from urllib import request
import json
def fetch_data(url):
    req = request.Request(url)
    req.add_header('User-Agent','Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/127.0.0.0 Safari/537.36 Edg/127.0.0.0')
    with request.urlopen(req) as f:
        print('Status:',f.status,f.reason)
        for k,v in f.getheaders():
            print('%s: %s' % (k,v))
        return json.loads(f.read().decode('utf-8'))

# 测试
URL = 'https://api.weatherapi.com/v1/current.json?key=b4e8f86b44654e6b86885330242207&q=Xunwu&aqi=no'
data = fetch_data(URL)
print(data)