How to traverse a json file and find the key name using value?-CodePudding

can anyone please help me to find the solution I am having a JSON file like below

    {
   "Parent1": ["Child1", "Child2","Child5"],
   "Parent2": ["Child3", "Child4","Child5"]
    }

expectation: Python code to find the parent name using child name

User input: Child1
Expected output : Parent1

User input: Child5
Expected output : Parent1,Parent2

CodePudding user response：

This is an apporach you can use

choice = input("Enter search string ")
ans = []
for i,j in data.items():
    if choice in j:
        ans.append(i)

ans will now contain the keys you need as a list

CodePudding user response：

You should read the json file and then loop over the dictionary to find matching for the given input

def find_key_name_by_value(json_input, key_to_find):
    result = []
    for key, value in input.items():
        if key_to_find in value:
            result.append(key)
    return result

json_input = {
   "Parent1": ["Child1", "Child2","Child5"],
   "Parent2": ["Child3", "Child4","Child5"]
    }
result = find_key_name_by_value(json_input, "Child4")
print(result)