python - Loop through json file and delete key if it matches

I have the following structure on a JSON file:

{
  "channels": [
    "180873781382873088",
    "181268808055521280",
    "183484852287307777",
    "174886257636147201",
    "174521530573651968"
  ]
}

I want to know how I can loop through the file searching for a specific string, and delete it if it matches.

Thank you.

EDIT: A Google search pointed me to using a for loop and using the del command to remove the key, so here's what I tried:

channel = "180873781382873088"


for item in data['channels']:
    del channel

But it only deletes the variable channel, not the key that matches it's value.

Answer

Try

data['channels'].remove(channel)

instead of the for loop.

This will automatically search the array and remove any key matching your variable. If you need help saving the results to a file I would open another question.