task_1.py

'''
Task 1: Transactions Processing
Input Dataset
[
 {"user_id": 1, "amount": 100},
 {"user_id": 2, "amount": 200},
 {"user_id": 1, "amount": 150},
 {"user_id": 3, "amount": 300},
 {"user_id": 2, "amount": -50},
 {"user_id": null, "amount": 500},
 {"user_id": 4, "amount": "invalid"}
]

Requirements
Ignore invalid records:
user_id is null
amount is not a number
Allow negative amounts (refunds)
Calculate:
Total spend per user
Top spender (highest total)

Expected Output
{
 "totals": {
   "1": 250,
   "2": 150,
   "3": 300
 },
 "top_spender": 3
}

'''

data = [
 {"user_id": 1, "amount": 100},
 {"user_id": 2, "amount": 200},
 {"user_id": 1, "amount": 150},
 {"user_id": 3, "amount": 300},
 {"user_id": 2, "amount": -50},
 {"user_id": None, "amount": 500},
 {"user_id": 4, "amount": "invalid"}
]

# print(data)

clean_data = []

for i in data:
    user_id=i["user_id"]
    amount=i["amount"]
    print(user_id,amount,type(amount))
    
    if user_id != None and type(amount) == int:
        temp = {"user_id":user_id,"amount":amount}
        clean_data.append(temp)
    else:
        print("--------")
        pass



# print(clean_data)

def total_spend_user(data):
    user_ids = [i["user_id"] for i in data]
    user_ids = set(user_ids)
    print(user_ids)
    total_spend_user=[]
    total =0
    for i in data:
        user_id = i["user_id"]
        amount = i["amount"]

        print(user_id,amount)

        for j in user_ids:
            print("---",user_id,j)
            if user_id == j:
                total += amount
                total_spend_user.append({user_id,total})
            else:
                pass
    return total_spend_user
    
print(total_spend_user(clean_data))
print(clean_data)