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

Author: sashko

CMakeLists.txt

@@ -340,7 +340,7 @@ ENDIF()
 
 execute_process(
     COMMAND "${PYTHON_EXECUTABLE}" -c
-    "from __future__ import print_function\ntry:\n import numpy\n import os\n inc_path = numpy.get_include()\n if os.path.exists(os.path.join(inc_path, 'numpy', 'arrayobject.h')):\n  print(inc_path, end='')\nexcept:\n pass"
+    "try:\n import numpy\n import os\n inc_path = numpy.get_include()\n if os.path.exists(os.path.join(inc_path, 'numpy', 'arrayobject.h')):\n  print(inc_path, end='')\nexcept:\n pass"
     OUTPUT_VARIABLE PYTHON_NUMPY_INCLUDE_DIR)
 
 include(GrComponent)

docs/doxygen/doxyxml/__init__.py

@@ -51,7 +51,6 @@
 u'Outputs the vital aadvark statistics.'
 
 """
-from __future__ import unicode_literals
 
 from .doxyindex import DoxyIndex, DoxyFunction, DoxyParam, DoxyClass, DoxyFile, DoxyNamespace, DoxyGroup, DoxyFriend, DoxyOther
 

docs/doxygen/doxyxml/base.py

@@ -13,8 +13,6 @@
 to the doxygen xml docs than the generated classes provide.
 """
 
-from __future__ import print_function
-from __future__ import unicode_literals
 
 import os
 import pdb

docs/doxygen/doxyxml/doxyindex.py

@@ -10,7 +10,6 @@
 Classes providing more user-friendly interfaces to the doxygen xml
 docs than the generated classes provide.
 """
-from __future__ import unicode_literals
 
 import os
 

docs/doxygen/doxyxml/generated/__init__.py

@@ -5,4 +5,3 @@
 resultant classes are not very friendly to navigate so the rest of the
 doxyxml module processes them further.
 """
-from __future__ import unicode_literals

docs/doxygen/doxyxml/generated/compound.py

@@ -3,7 +3,6 @@
 """
 Generated Mon Feb  9 19:08:05 2009 by generateDS.py.
 """
-from __future__ import unicode_literals
 
 
 from xml.dom import minidom

docs/doxygen/doxyxml/generated/compoundsuper.py

@@ -4,8 +4,6 @@
 # Generated Thu Jun 11 18:44:25 2009 by generateDS.py.
 #
 
-from __future__ import print_function
-from __future__ import unicode_literals
 
 import sys
 

docs/doxygen/doxyxml/generated/index.py

@@ -3,7 +3,6 @@
 """
 Generated Mon Feb  9 19:08:05 2009 by generateDS.py.
 """
-from __future__ import unicode_literals
 
 from xml.dom import minidom
 

docs/doxygen/doxyxml/generated/indexsuper.py

@@ -4,8 +4,6 @@
 # Generated Thu Jun 11 18:43:54 2009 by generateDS.py.
 #
 
-from __future__ import print_function
-from __future__ import unicode_literals
 
 import sys
 

docs/doxygen/doxyxml/text.py

@@ -9,7 +9,6 @@
 """
 Utilities for extracting text from generated classes.
 """
-from __future__ import unicode_literals
 
 def is_string(txt):
     if isinstance(txt, str):

docs/doxygen/other/doxypy.py

@@ -1,7 +1,5 @@
 #!/usr/bin/env python
 
-from __future__ import print_function
-from __future__ import unicode_literals
 
 __applicationName__ = "doxypy"
 __blurb__ = """

docs/doxygen/update_pydoc.py

@@ -15,7 +15,6 @@
 python docstrings.
 
 """
-from __future__ import unicode_literals
 
 import os, sys, time, glob, re, json
 from argparse import ArgumentParser

gnuradio-runtime/apps/evaluation_random_numbers.py

@@ -8,9 +8,6 @@
 #
 #
 
-from __future__ import print_function
-from __future__ import division
-from __future__ import unicode_literals
 from gnuradio import gr
 import numpy as np
 from scipy.stats import norm, laplace, rayleigh

gnuradio-runtime/examples/mp-sched/affinity_set.py

@@ -4,8 +4,6 @@
 # Title: Affinity Set Test
 ##################################################
 
-from __future__ import print_function
-from __future__ import unicode_literals
 from gnuradio import eng_notation
 from gnuradio import gr
 from gnuradio import blocks

gnuradio-runtime/examples/mp-sched/plot_flops.py

@@ -12,7 +12,6 @@
 Reads output from run_synthetic.py and runs gnuplot showing
 GFLOPS as f(npipes, nstages)
 """
-from __future__ import unicode_literals
 
 import re
 import sys

gnuradio-runtime/examples/mp-sched/run_synthetic.py

@@ -11,8 +11,6 @@
 """
 Run synthetic.py for npipes in [1,16], nstages in [1,16]
 """
-from __future__ import division
-from __future__ import unicode_literals
 
 import re
 import sys

gnuradio-runtime/examples/mp-sched/synthetic.py

@@ -8,9 +8,6 @@
 #
 #
 
-from __future__ import print_function
-from __future__ import division
-from __future__ import unicode_literals
 from gnuradio import gr, eng_notation
 from gnuradio import blocks, filter
 from gnuradio.eng_arg import eng_float, intx

gnuradio-runtime/examples/mp-sched/wfm_rcv_pll_to_wav.py

@@ -8,8 +8,6 @@
 #
 #
 
-from __future__ import division
-from __future__ import unicode_literals
 from gnuradio import gr, gru, eng_notation, filter
 from gnuradio import audio
 from gnuradio import analog

gnuradio-runtime/examples/network/audio_sink.py

@@ -8,7 +8,6 @@
 #
 #
 
-from __future__ import unicode_literals
 from gnuradio import gr
 from gnuradio import blocks
 from argparse import ArgumentParser

gnuradio-runtime/examples/network/audio_source.py

@@ -8,7 +8,6 @@
 #
 #
 
-from __future__ import unicode_literals
 from gnuradio import gr
 from gnuradio import blocks
 from argparse import ArgumentParser

gnuradio-runtime/examples/network/dial_tone_sink.py

@@ -8,7 +8,6 @@
 #
 #
 
-from __future__ import unicode_literals
 from gnuradio import gr, audio
 from gnuradio import blocks
 from argparse import ArgumentParser

gnuradio-runtime/examples/network/dial_tone_source.py

@@ -8,7 +8,6 @@
 #
 #
 
-from __future__ import unicode_literals
 from gnuradio import gr
 from argparse import ArgumentParser
 import sys

gnuradio-runtime/examples/network/vector_sink.py

@@ -8,7 +8,6 @@
 #
 #
 
-from __future__ import unicode_literals
 from gnuradio import gr
 from gnuradio import blocks
 from gnuradio.eng_arg import eng_float, intx

gnuradio-runtime/examples/network/vector_source.py

@@ -8,7 +8,6 @@
 #
 #
 
-from __future__ import unicode_literals
 from gnuradio import gr
 from gnuradio import blocks
 from argparse import ArgumentParser

gnuradio-runtime/examples/volk_benchmark/volk_math.py

@@ -1,7 +1,5 @@
 #!/usr/bin/env python
 
-from __future__ import print_function
-from __future__ import unicode_literals
 from gnuradio import gr
 from gnuradio import blocks
 import argparse

gnuradio-runtime/examples/volk_benchmark/volk_plot.py

@@ -1,7 +1,5 @@
 #!/usr/bin/env python
 
-from __future__ import division
-from __future__ import unicode_literals
 import sys, math
 import argparse
 from volk_test_funcs import (create_connection, list_tables, get_results,

gnuradio-runtime/examples/volk_benchmark/volk_test_funcs.py

@@ -1,7 +1,5 @@
 #!/usr/bin/env python
 
-from __future__ import print_function
-from __future__ import unicode_literals
 from gnuradio import gr
 from gnuradio import blocks
 import math, sys, os, time

gnuradio-runtime/examples/volk_benchmark/volk_types.py

@@ -1,7 +1,5 @@
 #!/usr/bin/env python
 
-from __future__ import print_function
-from __future__ import unicode_literals
 from gnuradio import gr
 from gnuradio import blocks
 import argparse

gnuradio-runtime/lib/math/gen_sine_table.py

@@ -8,7 +8,6 @@
 #
 #
 
-from __future__ import unicode_literals
 import math
 import sys
 

gnuradio-runtime/python/gnuradio/__init__.py

@@ -7,7 +7,6 @@
 
 GNU Radio is licensed under the GNU General Public License (GPL) version 3. All of the code is copyright of the Free Software Foundation.
 """
-from __future__ import unicode_literals
 
 # This file makes gnuradio a package
 # The docstring will be associated with the top level of the package.

gnuradio-runtime/python/gnuradio/ctrlport/GNURadioControlPortClient.py

@@ -16,8 +16,6 @@
 is currently the only supported transport.
 
 """
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from gnuradio.ctrlport.RPCConnection import RPCMethods
 try:

gnuradio-runtime/python/gnuradio/ctrlport/GrDataPlotter.py

@@ -8,8 +8,6 @@
 #
 #
 
-from __future__ import print_function
-from __future__ import unicode_literals
 
 from gnuradio import gr
 from gnuradio import blocks

gnuradio-runtime/python/gnuradio/ctrlport/RPCConnection.py

@@ -16,7 +16,6 @@
     options: result of command argument parsing (optparse.Values)
 """
 
-from __future__ import unicode_literals
 
 RPCMethods = {'thrift': 'Apache Thrift',
              #'ice': 'Zeroc ICE'

gnuradio-runtime/python/gnuradio/ctrlport/RPCConnectionThrift.py

@@ -8,7 +8,6 @@
 #
 #
 
-from __future__ import unicode_literals
 from thrift import Thrift
 from thrift.transport import TSocket
 from thrift.transport import TTransport

gnuradio-runtime/python/gnuradio/ctrlport/__init__.py

@@ -1,5 +1,3 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
 #
 # Copyright 2012 Free Software Foundation, Inc.
 #

gnuradio-runtime/python/gnuradio/ctrlport/gr-perf-monitorx

@@ -8,8 +8,6 @@
 #
 #
 
-from __future__ import print_function
-
 from argparse import ArgumentParser
 
 import sys, time, re, signal

gnuradio-runtime/python/gnuradio/ctrlport/monitor.py

@@ -8,8 +8,6 @@
 #
 #
 
-from __future__ import print_function
-from __future__ import unicode_literals
 
 import sys, subprocess, re, signal, time, atexit, os
 from gnuradio import gr

gnuradio-runtime/python/gnuradio/eng_arg.py

@@ -10,7 +10,6 @@
 '''
 Add support for engineering notation to argparse.ArgumentParser
 '''
-from __future__ import unicode_literals
 
 import argparse
 from gnuradio import eng_notation

gnuradio-runtime/python/gnuradio/eng_notation.py

@@ -9,7 +9,6 @@
 """
 Display numbers as strings using engineering notation.
 """
-from __future__ import unicode_literals
 
 import six
 

gnuradio-runtime/python/gnuradio/eng_option.py

@@ -8,8 +8,6 @@
 #
 
 '''Add support for engineering notation to optparse.OptionParser'''
-from __future__ import absolute_import
-from __future__ import unicode_literals
 
 from copy import copy
 from optparse import Option, OptionValueError

gnuradio-runtime/python/gnuradio/gr/__init__.py

@@ -12,8 +12,6 @@
 """
 Core contents.
 """
-from __future__ import absolute_import
-from __future__ import unicode_literals
 
 # This is the main GNU Radio python module.
 # We pull the pybind output and the other modules into the gnuradio.gr namespace

gnuradio-runtime/python/gnuradio/gr/exceptions.py

@@ -1,4 +1,3 @@
-from __future__ import unicode_literals
 #
 # Copyright 2004 Free Software Foundation, Inc.
 #

gnuradio-runtime/python/gnuradio/gr/gateway.py

@@ -7,8 +7,6 @@
 #
 #
 
-from __future__ import print_function
-from __future__ import unicode_literals
 
 
 import numpy

gnuradio-runtime/python/gnuradio/gr/hier_block2.py

@@ -1,4 +1,3 @@
-from __future__ import unicode_literals
 #
 # Copyright 2006,2007,2014 Free Software Foundation, Inc.
 #

gnuradio-runtime/python/gnuradio/gr/packet_utils.py

@@ -8,9 +8,6 @@
 #
 #
 
-from __future__ import print_function
-from __future__ import division
-from __future__ import unicode_literals
 from gnuradio import gr
 import pmt
 

gnuradio-runtime/python/gnuradio/gr/pubsub.py

@@ -14,8 +14,6 @@
 This is a proof of concept implementation, will likely change significantly.
 """
 
-from __future__ import print_function
-from __future__ import unicode_literals
 
 class pubsub(dict):
     def __init__(self):

gnuradio-runtime/python/gnuradio/gr/qa_prefs.py

@@ -8,7 +8,6 @@
 #
 #
 
-from __future__ import print_function
 
 
 from gnuradio import gr, gr_unittest

gnuradio-runtime/python/gnuradio/gr/qa_tag_utils.py

@@ -8,7 +8,6 @@
 #
 #
 
-from __future__ import print_function
 
 
 from gnuradio import gr, gr_unittest

gnuradio-runtime/python/gnuradio/gr/tag_utils.py

@@ -1,4 +1,3 @@
-from __future__ import unicode_literals
 import pmt
 
 from . import gr_python as gr