Usage examples

import Populater

Person = {
    "age": 17,
    "name": {
        "first": "Marty",
        "last": "Mcfly",
        "full": "Marty Mcfly"
    }
}
ctx                               =  Populater( Person )

assert ctx('{{ age }}')                   == '17'
assert ctx('< age')                       == 17
assert ctx('= {{ age }}')                 == 17
assert ctx("< name.first")                == "Marty"
assert ctx("= {{ age }} > 18")            is True
assert ctx("{{ name.none }}")             == ""
assert ctx("= {{ name.none }}")           is None
assert ctx(":= {{ name.full }}")          == "= Marty Mcfly"
assert ctx("= '= {{ name.full }}'")       == "= Marty Mcfly"
assert ctx(":: {{ name.full }}")          == ": Marty Mcfly"
assert ctx("= self['name']['full']")      == "Marty Mcfly"