TypeError Traceback (most recent call last) Cell In[1], line 5 3 policy_start_date = “2025-01-01” # 政策开始日期 4 admission_date = “2025-04-01” # 住院日期 ----> 5 days_after_payment = (admission_date - policy_start_date).days # 缴费后到住院的天数 7 # 计算是否在等待期内 8 waiting_period = 90 # 等待期天数
TypeError: unsupported operand type(s) for -: ‘str’ and ‘str’