From c520bb0153352efcff5526749aa3906ee194ce5a Mon Sep 17 00:00:00 2001
From: Jiří Pinkava <j-pi@seznam.cz>
Date: Sun, 26 Jun 2016 13:04:42 +0200
Subject: utils: gr_plot_const replace OptionParser by ArgumentParser

---
 gr-utils/python/utils/gr_plot_const | 30 +++++++++++++-----------------
 1 file changed, 13 insertions(+), 17 deletions(-)

(limited to 'gr-utils/python/utils/gr_plot_const')

diff --git a/gr-utils/python/utils/gr_plot_const b/gr-utils/python/utils/gr_plot_const
index e2580dd58f..28f6a540da 100755
--- a/gr-utils/python/utils/gr_plot_const
+++ b/gr-utils/python/utils/gr_plot_const
@@ -33,7 +33,7 @@ except ImportError:
     print "Please install Matplotlib to run this script (http://matplotlib.sourceforge.net/)"
     raise SystemExit, 1
 
-from optparse import OptionParser
+from argparse import ArgumentParser
 
 class draw_constellation:
     def __init__(self, filename, options):
@@ -221,24 +221,20 @@ def find(item_in, list_search):
 
 
 def main():
-    usage="%prog: [options] input_filename"
     description = "Takes a GNU Radio complex binary file and displays the I&Q data versus time and the constellation plot (I vs. Q). You can set the block size to specify how many points to read in at a time and the start position in the file. By default, the system assumes a sample rate of 1, so in time, each sample is plotted versus the sample number. To set a true time axis, set the sample rate (-R or --sample-rate) to the sample rate used when capturing the samples."
 
-    parser = OptionParser(conflict_handler="resolve", usage=usage, description=description)
-    parser.add_option("-B", "--block", type="int", default=1000,
-                      help="Specify the block size [default=%default]")
-    parser.add_option("-s", "--start", type="int", default=0,
-                      help="Specify where to start in the file [default=%default]")
-    parser.add_option("-R", "--sample-rate", type="float", default=1.0,
-                      help="Set the sampler rate of the data [default=%default]")
-
-    (options, args) = parser.parse_args ()
-    if len(args) != 1:
-        parser.print_help()
-        raise SystemExit, 1
-    filename = args[0]
-
-    dc = draw_constellation(filename, options)
+    parser = ArgumentParser(conflict_handler="resolve", description=description)
+    parser.add_argument("-B", "--block", type=int, default=1000,
+                      help="Specify the block size [default=%(default)r]")
+    parser.add_argument("-s", "--start", type=int, default=0,
+                      help="Specify where to start in the file [default=%(default)r]")
+    parser.add_argument("-R", "--sample-rate", type=float, default=1.0,
+                      help="Set the sampler rate of the data [default=%(default)r]")
+    parser.add_argument("file", metavar="FILE", nargs=1,
+                      help="Input file with complex samples")
+    args = parser.parse_args()
+
+    dc = draw_constellation(args.file[0], args)
 
 if __name__ == "__main__":
     try:
-- 
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