如何使用python检查redis-数据库中是否存在值？

Question

下面是我的python代码：

def check(request):
    import redis
    R = redis.StrictRedis(host='127.0.0.1', port=6379, db=0)
    R.set("name","srk")
    r = R.HSET("name","srk")
    print(r)

它遇到以下错误消息：

Internal Server Error: /get_user/
Traceback (most recent call last):
  File "/home/soubhagya/.local/share/virtualenvs/pipenv-r-zifbiy/lib/python3.5/site-packages/django/core/handlers/exception.py", line 34, in inner
    response = get_response(request)
  File "/home/soubhagya/.local/share/virtualenvs/pipenv-r-zifbiy/lib/python3.5/site-packages/django/core/handlers/base.py", line 126, in _get_response
    response = self.process_exception_by_middleware(e, request)
  File "/home/soubhagya/.local/share/virtualenvs/pipenv-r-zifbiy/lib/python3.5/site-packages/django/core/handlers/base.py", line 124, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/home/soubhagya/Desktop/Dev/rango/backend/access/views.py", line 103, in get_user
    r = R.HSET("name","srk")
AttributeError: 'StrictRedis' object has no attribute 'HSET'

在py-redis中，如何检查一个值是否存在于redis数据库中。原始查询将有帮助。请查一下我的密码。

Answer 1

StrictRedis没有HSET函数，但是它有在Redis散列中设置字段的hset函数。这就是你所犯错误的原因。

若要检查Redis和redis-py中是否存在密钥，请使用r = R.exists("name")。