CODEWITHSUNDEEP
python-2.7
Umair Ayub
Umair Ayub

Reputation: 21241

How to pass these parameters to method - Python 2.7

I have a strange requirement.

I have a method (posting only relevant code, not full code.)

def updateLevelFile(level, __data,  mode='r+', encoding='utf-8'):
                    # I want this to be dynamic
                    __data[index]["tasks"][0]['choices'][0]["4"] = str(host['httporhttps'])
                    # I want this to be dynamic

Need # I want this to be dynamic section to be dynamic.

means I will pass this method which keys to update and the values too ..

Keys can be different each time, for some instances we can have key ["tasks"][2]["task_default_text"]

How to do it?

Whole code in this method is being used so many times, I don't want to replicate it, I want to make it a method and call again and again.

WHAT I HAVE TRIED?

I have tried to pass

'"tasks": [{"choices": [{"4": "1"}]}]' equivalent JSON of ["tasks"][0]['choices'][0]["4"] and decoded into dictionary

and then do something like __data[index]to_update but its obviously invalid syntax.

Upvotes: 0

Views: 81

Answers (2)

freakish
freakish

Reputation: 56467

Try this (assuming I understand your question correctly):

def set_value_for_path(obj, path, value):
    for key in path[:-1]:
        obj = obj[key]
    # Note: will raise an exception if path is an empty list
    obj[path[-1]] = value

and in your function

set_value_for_path(
    __data[index],
    ("tasks", 0, 'choices', 0, "4"),
    str(host['httporhttps'])
)

Now you can turn second argument of set_value_for_path function into updateLevelFile function param, e.g.

def updateLevelFile(level, __data,  mode='r+', encoding='utf-8', path):
    # ...
    set_value_for_path(__data[index], path, str(host['httporhttps']))
    # ...

updateLevelFile(level, __data, 'r+', 'utf-8', ("tasks", 0, 'choices', 0, "4"))

Upvotes: 2

Falloutcoder
Falloutcoder

Reputation: 1011

You can use kwargs, a example below to give an idea.

def updateLevelFile(level, __data,  mode='r+', encoding='utf-8', **kwargs):
    task_index = kwargs.pop('task_index')
    key = kwargs.pop('key')
    key_index = kwargs.pop('key_index')
    __data[index]["tasks"][task_index][key][key_index]["4"] = str(host['httporhttps'])

#Example function call
updateLevelFile(level, __data, task_index=2, key="task_default_text", key_index=2)

Upvotes: 2

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