gnuradio-companion/core/params/template_arg.py
Oleksandr Kravchuk 43e6a43e3d python: Remove unnecessary 'from __future__ import'
All of the removed `from __future__ import` were needed in older
versions of Python (mostly 2.5.x and below) but later became mandatory
in most versions of Python 3 hence are not necessary anymore.

More specifically, according to __future__.py[1]:
- unicode_literals is part of Python since versions 2.6.0 and 3.0.0;
- print_function is part of Python since versions 2.6.0 and 3.0.0;
- absolute_import is part of Python since versions 2.5.0 and 3.0.0;
- division is part of Python since versions 2.2.0 and 3.0.0;

Get rid of those unnecessary imports to slightly clean up the codebase.

[1] https://github.com/python/cpython/blob/master/Lib/__future__.py
2020-08-03 11:40:27 +02:00

39 lines
1.1 KiB
Python

# Copyright 2008-2017 Free Software Foundation, Inc.
# This file is part of GNU Radio
#
# SPDX-License-Identifier: GPL-2.0-or-later
#
class TemplateArg(str):
"""
A cheetah template argument created from a param.
The str of this class evaluates to the param's to code method.
The use of this class as a dictionary (enum only) will reveal the enum opts.
The __call__ or () method can return the param evaluated to a raw python data type.
"""
def __new__(cls, param):
value = param.to_code()
instance = str.__new__(cls, value)
setattr(instance, '_param', param)
return instance
def __getitem__(self, item):
return str(self._param.get_opt(item)) if self._param.is_enum() else NotImplemented
def __getattr__(self, item):
if not self._param.is_enum():
raise AttributeError()
try:
return str(self._param.get_opt(item))
except KeyError:
raise AttributeError()
def __str__(self):
return str(self._param.to_code())
def __call__(self):
return self._param.get_evaluated()