trace-dkey

Python library to trace path of a particular key inside a nested dict

Installation

For stable version

• pip install trace-dkey

For development

• git clone https://github.com/Agent-Hellboy/trace-dkey

• cd trace-dkey

• python -m venv .venv

• source .venv/bin/activate

Example

you can use the library as python3 -m trace_dkey --file=test.json --key=name, test.json is

A JSON file containing name as key

>>> from trace_dkey import trace
>>> l={'a':{'b':{'c':{'d':{'e':{'f':1}}}}}}
>>> print(trace(l,'f'))
[['a', 'b', 'c', 'd', 'e', 'f']]

Now you can query it as l['a']['b']['c']['d']['e']['f']

>>> l['a']['b']['c']['d']['e']['f']
1

Documentation

For more details, you can refer to the documentation.

General Info

• The value returned by the trace function is an array of paths, where each path is an array of dictionary keys.

• Because of that, the library can be used in a practical way by taking advantage of this format.

• In the example below we use the returned path to iterate over the dictionary keys and print the key value:

from trace_dkey import trace
l={'a':{'b':{'c':{'d':{'e':{'f':1}}}}}}

paths = trace(l,'f')

for path in paths:
   dic = l
   for key in path:
      dic = dic[key]
   print(dic)

• This addresses a wide range of questions asked on StackOverflow about key inside a nested dict

• At least 13 duplicate questions can be found on Stackoverflow

• This can be tracked on https://you.com/search?q=find%20key%20in%20nested%20dictionary%20python

Contributing

Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.