Functions that implement basic functionality that will be used in the library.
A set of functions that provide usefull functionality
Examples:
path = Path('.')
path.ls()
path = Path('.')
path.ls(include=['.ipynb'])
path = Path('.')
path.ls(include=['.ipynb'], exclude=['_checkpoints'])
year = 2000
month = 2
monthlen(year, month)
paths = ProjectPath('data')
test_eq(sorted([o.name for o in paths.path.iterdir()]),
['config', 'dataset', 'hotspots', 'ladsweb', 'outputs', 'web'])