aspyatkin/gang

Python dictionary with dot-style access

Gang

Python dictionary with dot-style access

from gang import subclass_object

d = dict(hello="world", lorem=list(dict(ipsum="dolor"), dict(sit="amet")))

g = subclass_object(d)

print(g.hello)  # world
print(g.lorem[0].ipsum)  # dolor
print(g.lorem[1].sit)  # amet

Another example

from gang import subclass_object

grades = dict(
    Math=dict(
        all=[5,5,5,5],
        avg=5.0
    ),
    Biology=dict(
        all=[4,4,5,5],
        avg=4.5
    )
)

t = subclass_object(grades)

for klass, grades in t.iteritems():
    print('{0}\n  All: {1}\n  Average: {2:f}'.format(
        klass,
        str(grades.all),
        grades.avg
    ))
    
# Output
# Biology
#   All: [4, 4, 5, 5]
#   Average: 4.500000
# Math
#   All: [5, 5, 5, 5]
#   Average: 5.000000

subclass_object returns GangDict or GangList, which are inherited from dict and list. So you can use all method for standard dictionaries and lists.

Note that transformation to subclassed dict or list is "lazy". In the example above, the list in d['lorem'] is not transformed until you call g.lorem. Unfortunately, it is not cached also. So each call to g.lorem will make new transformation. This can affect performance seriously.

I find this method useful to work with big config files in JSON or YAML. If you don't want to deal with lots of config['some_value_1']['some_value_2']... and make code more readable, you can give it a try.