diff options
| author | Marcus Müller <marcus@hostalia.de> | 2018-06-25 19:28:29 +0200 |
|---|---|---|
| committer | Marcus Müller <marcus@hostalia.de> | 2018-06-25 19:28:29 +0200 |
| commit | 03ae7938351f01313d30a41927ffb77670fcca14 (patch) | |
| tree | 586744f0e2b7560dc161f2a7a60030155d43ce8a /gr-utils/python/utils/plot_fft_base.py | |
| parent | d78f7fcd0dadd362fcdc99194da5343a506eb519 (diff) | |
| parent | c66aec4dfae559004e88da968d1ce57584e144ee (diff) | |
Merge branch 'next_python3' into next
This brings Python3 to `next`.
It also brings
* a bump in SWIG dependency version
* various GRC improvements,
* YAML instead of XML in GRC
* a lot of broken unit tests
Diffstat (limited to 'gr-utils/python/utils/plot_fft_base.py')
| -rw-r--r--[-rwxr-xr-x] | gr-utils/python/utils/plot_fft_base.py | 35 |
1 files changed, 18 insertions, 17 deletions
diff --git a/gr-utils/python/utils/plot_fft_base.py b/gr-utils/python/utils/plot_fft_base.py index c99462147d..5040aefa87 100755..100644 --- a/gr-utils/python/utils/plot_fft_base.py +++ b/gr-utils/python/utils/plot_fft_base.py @@ -20,22 +20,26 @@ # Boston, MA 02110-1301, USA. # +from __future__ import print_function +from __future__ import division +from __future__ import unicode_literals + try: import scipy from scipy import fftpack except ImportError: - print "Please install SciPy to run this script (http://www.scipy.org/)" - raise SystemExit, 1 + print("Please install SciPy to run this script (http://www.scipy.org/)") + raise SystemExit(1) try: from pylab import * except ImportError: - print "Please install Python Matplotlib (http://matplotlib.sourceforge.net/) and Python TkInter https://wiki.python.org/moin/TkInter to run this script" - raise SystemExit, 1 + print("Please install Python Matplotlib (http://matplotlib.sourceforge.net/) and Python TkInter https://wiki.python.org/moin/TkInter to run this script") + raise SystemExit(1) from argparse import ArgumentParser -class plot_fft_base: +class plot_fft_base(object): def __init__(self, datatype, filename, options): self.hfile = open(filename, "r") self.block_length = options.block @@ -79,33 +83,33 @@ class plot_fft_base: show() def get_data(self): - self.position = self.hfile.tell()/self.sizeof_data + self.position = self.hfile.tell() / self.sizeof_data self.text_file_pos.set_text("File Position: %d" % (self.position)) try: self.iq = scipy.fromfile(self.hfile, dtype=self.datatype, count=self.block_length) except MemoryError: - print "End of File" + print("End of File") else: self.iq_fft = self.dofft(self.iq) tstep = 1.0 / self.sample_rate - #self.time = scipy.array([tstep*(self.position + i) for i in xrange(len(self.iq))]) - self.time = scipy.array([tstep*(i) for i in xrange(len(self.iq))]) + #self.time = scipy.array([tstep*(self.position + i) for i in range(len(self.iq))]) + self.time = scipy.array([tstep*(i) for i in range(len(self.iq))]) self.freq = self.calc_freq(self.time, self.sample_rate) def dofft(self, iq): N = len(iq) iq_fft = scipy.fftpack.fftshift(scipy.fft(iq)) # fft and shift axis - iq_fft = 20*scipy.log10(abs((iq_fft+1e-15)/N)) # convert to decibels, adjust power + iq_fft = 20*scipy.log10(abs((iq_fft+1e-15) / N)) # convert to decibels, adjust power # adding 1e-15 (-300 dB) to protect against value errors if an item in iq_fft is 0 return iq_fft def calc_freq(self, time, sample_rate): N = len(time) - Fs = 1.0 / (time.max() - time.min()) + Fs = 1.0 / (time.max( - time.min())) Fn = 0.5 * sample_rate - freq = scipy.array([-Fn + i*Fs for i in xrange(N)]) + freq = scipy.array([-Fn + i*Fs for i in range(N)]) return freq def make_plots(self): @@ -228,9 +232,9 @@ class plot_fft_base: def find(item_in, list_search): try: - return list_search.index(item_in) != None + return list_search.index(item_in) != None except ValueError: - return False + return False def main(): parser = plot_fft_base.setup_options() @@ -243,6 +247,3 @@ if __name__ == "__main__": main() except KeyboardInterrupt: pass - - - |