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Signed-off-by: Josh Morman <jmorman@gnuradio.org>
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Signed-off-by: Josh Morman <jmorman@perspectalabs.com>
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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
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This should reduce the number of times users are prompted to install
pylab || scipy when they'd actually get away with functionality fully
contained in numpy and matplotlib.
This only solves the obvious cases. There's some usage of `pylab.mlab`
that would need more than 20s of consideration.
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copy, head, skiphead, vector_map, and annotator blocks to use gr-blocks.
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Also fixes up some other missing moves.
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possible.
Passing make and make test. Examples and apps need testing.
gr-filter relies on sig_source and noise_source, so can't remove them from core.
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