python 运行错误收集

目录

• global全局声明错误
  • 字典使用不规范

global全局声明错误

SyntaxError: name 'is_login' is used prior to global declaration
解决办法：global is_login 放在 if is_login:的上面
is_login = False

def login_auth(func_name):
    def inner(*args, **kwargs):
        if is_login:
            res = func_name(*args, **kwargs)
            return res
        username = input('username>>>:').strip()
        password = input('password>>>>:').strip()
        if username == 'jason' and password =='123':
            # 将全局名称空间中记录用户登录状态的数据值改为True
            global  is_login   # 声明报错，需要写在函数定义的下面，即if is_login:上面
            is_login = True
            res = func_name(*args, **kwargs)
            return res
        else:
            print('用户名或密码错误 无法执行函数')
    return inner

字典使用不规范

func_dict = {
    '1':register,
    '2':login,
    '3':add_shop_car,
    '4':pay_shop_car
}
while True:
    print("""
    1.注册
    2.登录
    3.添加购物车
    4.结算购物车
    """)
    choice = input('请输入功能编号>>>>:').strip()
    if choice in func_dict:
        func_name = func_dict(choice) ##错误
        func_name()
    else:
        print('请输入正确编号')
应该使用如下：
func_name= func_dict[choice]或者用func_dict.get(choice)

使用requests请求https相关网站报错，可能使用了特殊代理配置导致的，解决方案是关闭代理即可

windows电脑pip安装mysqlclient报错

报错信息如下：
D:\Python38\Scripts>pip3.8 install pip_search
WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLEOFError(8, 'EOF occurred in violation of protocol (_ssl.c:1124)'))': /simple/pip-search/
WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLEOFError(8, 'EOF occurred in violation of protocol (_ssl.c:1124)'))': /simple/pip-search/
WARNING: Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLEOFError(8, 'EOF occurred in violation of protocol (_ssl.c:1124)'))': /simple/pip-search/
WARNING: Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLEOFError(8, 'EOF occurred in violation of protocol (_ssl.c:1124)'))': /simple/pip-search/
WARNING: Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLEOFError(8, 'EOF occurred in violation of protocol (_ssl.c:1124)'))': /simple/pip-search/
Could not fetch URL https://pypi.org/simple/pip-search/: There was a problem confirming the ssl certificate: HTTPSConnectionPool(host='pypi.org', port=443): Max retries exceeded with url: /simple/pip-search/ (Caused by SSLError(SSLEOFError(8, 'EOF occurred in violation of protocol (_ssl.c:1124)'))) - skipping
ERROR: Could not find a version that satisfies the requirement pip_search (from versions: none)
ERROR: No matching distribution found for pip_search
解决方案：电脑开了代理，关闭代理就解决了。通过谷歌搜索如下：
windows pip 安装报错  No matching distribution found

django数据库迁移失败：

更换数据库和项目即可

问题：报数据类型没有对应对象：'NoneType' object has no attribute 'username'
解决方法：打印这个对象是否为空，如果对象是none，就没有任何属性和方法。更换判断条件即可。