在使用requests.get调用API后，如何从返回的JSON对象替换键的值？

Question

Problem Summary:

I am calling an API with requests.get. The returned JSON object is being saved to a variable as a JSON dictionary:

data = json.loads(response.text)

I need to access that dictionary, then replace one of its keys' values, then I need to POST the new dictionary back to the API. I tried this by creating a function. The value is originally 'False' and I need to change it to be 'True':

def updatedata(data):
    k = 'my_key'
    for k, v in data.items():
        if k == 'my_key':
            data[v] = 'True'

response = requests.get(my_URL, headers=my_headers)
data = json.loads(response.text)
updatedata(data)

newlibary = updatedata()
print(newlibrary)

The problem that arises is that I can't figure out how to update the JSON library without calling the original JSON library again. How do I do the usual request.get, then use my function to change the value I need to change, then POST it again to a new API call like requests.post?

Answer 1

Your example doesn't replace the key, rather it creates a new entry with the value from the original key. If you need to simply update it then check if the key is in the dict, change it if it is, then return the new result. Also, you don't need the json lib with requests.

import requests

def updatedata(data, key, new_value):
    if key in data:
        data[key] = new_value
    return data

response = requests.get(my_URL, headers=my_headers)
data = response.json()
response = requests.post(myUrl, json=updatedata(data, 'my_key', True))

Answer 2

>>> myDict = {"testing": 1, "testing2": 2, "my_key": 3} >>> >>> >>> def updatedata(data): ... k = 'my_key' ... for key, val in data.items(): # use a different variable to reduce confusion ... if key == 'my_key': ... data[key] = 'True' # specify the key, not the value ... return data # optional, unless you want to save into a new variable ... >>> >>> updatedata(myDict) >>> myDict {'testing': 1, 'testing2': 2, 'my_key': 'True'} >>>