dicts

The dicts module provides both functions and a Dict class, a thin wrapper around a python dict that simplifies chaining operations.

Dict[K, V]

from haskellian import Dict

Dict({ 'a': 1, 'b': 2, 'c': 3 }) \
  .filter_k(lambda k: k != 'b') \
  .evolve({ 'c': lambda x: 2*x }) \
  .map(lambda k, v: f'{k}={v}')
# Dict({'a': 'a=1', 'c': 'c=6'})

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