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April 7, 2022

pathlib and json in Python

python

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pathlib

  • pathlib.Path object can be fed into open().

  • Path.touch(exist_ok=True) creates a new file if file_path does not exist, otherwise do nothing.

  • Example:

    from pathlib import Path

file_path = 'batches.json'
json_filepath = Path(file_path)
json_filepath.touch(exist_ok=True)

with open(json_filepath, "w+") as json_io:
  pass

json

  • We use json.load(IODevice) to load json data into a dictionary.
  • We use json.loads(String) to convert json string into a python object.
  • We use json.dumps(Object) to convert python object into a string.
  • Examples: 
    with open(json_file, "w+") as json_io:
  data = json.load(f)
    json_file = Path('batches.json')
json_file.touch(exist_ok=True)
with open(json_file, "w+") as json_io:
  json_io.write(json.dumps(trip_batches, indent=4))