code: def load_builtin_plugins(category=None, overwrite=False):
        # noqa: E501
      load_errors = []
      for cat, path in _plugins_builtin.items():
          if cat != category and category is not None:
              continue
          load_errors += load_plugins_dir(path, cat, overwrite=overwrite)
      return load_errors
docs: load plugins from builtin directories
  
      Parameters
      ----------
      name: None or str
      category : None or str
          if str, apply for single plugin category
  
      Examples
      --------
  
      >>> from pprint import pprint
      >>> pprint(view_plugins())
      {'decoders': {}, 'encoders': {}, 'parsers': {}}
  
      >>> errors = load_builtin_plugins()
      >>> errors
      []
  
      >>> pprint(view_plugins(),width=200)
      {'decoders': {'decimal.Decimal': 'encode/decode Decimal type',
                    'fractions.Fraction': 'encode/decode Fraction type',
                    'numpy.ndarray': 'encode/decode numpy.ndarray',
                    'pint.Quantity': 'encode/decode pint.Quantity object',
                    'python.set': 'decode/encode python set'},
       'encoders': {'decimal.Decimal': 'encode/decode Decimal type',
                    'fractions.Fraction': 'encode/decode Fraction type',
                    'numpy.ndarray': 'encode/decode numpy.ndarray',
                    'pint.Quantity': 'encode/decode pint.Quantity object',
                    'python.set': 'decode/encode python set'},
       'parsers': {'csv.basic': 'read *.csv delimited file with headers to {header:[column_values]}',
                   'csv.literal': 'read *.literal.csv delimited files with headers to {header:column_values}, with number strings converted to int/float',
                   'hdf5.read': 'read *.hdf5 (in read mode) files using h5py',
                   'ipynb': 'read Jupyter Notebooks',
                   'json.basic': 'read *.json files using json.load',
                   'keypair': "read *.keypair, where each line should be; '<key> <pair>'",
                   'yaml.ruamel': 'read *.yaml files using ruamel.yaml'}}
  
  
      >>> unload_all_plugins()