How to check word part exist as contain without checking extract matching in JSON file using python-CodePudding

import json

def word_exist_as_key(check):
   with open('most_used_common.json',encoding="utf8") as file:
      data = json.load(file)
      if check in data:
             return True
      return False
   
z=word_exist_as_key(str("අංගනය"))
print(z)

In here the word "අංගනයක්" exists but not "අංගනය". So I want to get "True" for this value.

CodePudding user response：

import json

def word_exist_as_key(check):
   with open('most_used_common.json',encoding="utf8") as file:
      data = json.load(file)
      return any(True for _ in data if check in _)

CodePudding user response：

You would essentially need to iterate through all the keys to see if any matched. Word of warning, depending on use case this could be less than a stellar idea as keys must all be unique.

import re
import json

def word_exist_as_key(check):
   with open('most_used_common.json',encoding="utf8") as file:
      data = json.load(file)
      for key in data.keys():
          if re.search(check, key) is not None:
             return True
      return False
   
z=word_exist_as_key(str("අංගනය"))

CodePudding user response：

I would personally suggest renaming the function to something like prefix_exists_in_dict or maybe dict_has_key_prefix, but in any case here's a simplistic approach you could take:

Loop over the keys in a dict, and if any key starts with a prefix, then immediately return True.

from typing import Any

def word_exist_as_key(data_dict: dict[str, Any], prefix: str):
    for key in data_dict:
        if key.startswith(prefix):
            return True
    return False

assert word_exist_as_key({'අංගනයක්': 'blah'}, 'අංගනය')

As mentioned in comments, if you are not interested in checking if a key starts with a value, rather you want to see if a key contains a value at all, then it becomes much simpler. In the above code, you would simply remove str.startswith usage and just replace it with an in check:

if prefix in key: