old_contents: """
  An implementation of JSON Schema for Python
  
  The main functionality is provided by the validator classes for each of the
  supported JSON Schema versions.
  
  Most commonly, `validate` is the quickest way to simply validate a given
  instance under a schema, and will create a validator for you.
  """
  
  from jsonschema.exceptions import (
      ErrorTree, FormatError, RefResolutionError, SchemaError, ValidationError
  )
  from jsonschema._format import (
      FormatChecker,
      draft3_format_checker,
      draft4_format_checker,
      draft6_format_checker,
      draft7_format_checker,
  )
  from jsonschema._types import TypeChecker
  from jsonschema.validators import (
      Draft3Validator,
      Draft4Validator,
      Draft6Validator,
      Draft7Validator,
      RefResolver,
      validate,
  )
  
  import importlib_metadata
  __version__ = importlib_metadata.version("jsonschema")
  
new_contents: """
  An implementation of JSON Schema for Python
  
  The main functionality is provided by the validator classes for each of the
  supported JSON Schema versions.
  
  Most commonly, `validate` is the quickest way to simply validate a given
  instance under a schema, and will create a validator for you.
  """
  
  from jsonschema.exceptions import (
      ErrorTree, FormatError, RefResolutionError, SchemaError, ValidationError
  )
  from jsonschema._format import (
      FormatChecker,
      draft3_format_checker,
      draft4_format_checker,
      draft6_format_checker,
      draft7_format_checker,
  )
  from jsonschema._types import TypeChecker
  from jsonschema.validators import (
      Draft3Validator,
      Draft4Validator,
      Draft6Validator,
      Draft7Validator,
      RefResolver,
      validate,
  )
  try:
      from importlib import metadata
  except ImportError: # for Python<3.8
      import importlib_metadata as metdata
  __version__ = metadata.version("jsonschema")
  
subject: Use importlib from std (if possible)