tips for python

dotdict.py

class dotdict(dict):
    __getattr__ = dict.__getitem__
    __setattr__ = dict.__setitem__

"""descriptions:
Like a JavaScript, get dictionary item via attribute.

d = dotdict()
d.a = 1
print(d.a) # ==> 1
print(d['a']) # ==> 1
d['b'] = 2
print(d.b) # ==> 2
"""

pp_class.py

class pp_class:
    __call__ = __rpow__ = __lt__ = __rfloordiv__ = lambda self, other: print(other) or other
pp = pp_class()

"""descriptions:
pp(123) prints "123" and return 123.
123 > pp, 123 ** pp, 123 // pp also same.

> is very low precedence operator, but higher than and, or, not, ...
** is very high precedence operator, but lower than x[i], x(args), x.attr, ...
// is also high precedence operator, but lower than **, unary +, -, ~

-123 ** pp prints 123
-123 // pp prints -123.

123 - 123 > pp prints 0,
123 - 123 ** pp, 123 - 123 // pp prints 123.
"""