10 files changed, 196 insertions, 40 deletions
diff --git a/gnuradio-examples/python/ofdm/gr_plot_ofdm.py b/gnuradio-examples/python/ofdm/gr_plot_ofdm.py
index e3b347189..b24855148 100755
--- a/gnuradio-examples/python/ofdm/gr_plot_ofdm.py
+++ b/gnuradio-examples/python/ofdm/gr_plot_ofdm.py
@@ -20,14 +20,24 @@
 # Boston, MA 02110-1301, USA.
 # 
 
-import scipy, pylab, math
-import struct, sys
-from pylab import *
-from matplotlib.font_manager import fontManager, FontProperties
+import math, struct, sys
 from optparse import OptionParser
-from scipy import fftpack
 from math import log10
 
+try:
+    import scipy
+    from scipy import fftpack
+except ImportError:
+    print "Error: Program requires scipy (see: www.scipy.org)."
+    sys.exit(1)
+
+try:
+    from pylab import *
+    from matplotlib.font_manager import fontManager, FontProperties
+except ImportError:
+    print "Error: Program requires matplotlib (see: matplotlib.sourceforge.net)."
+    sys.exit(1)
+
 matplotlib.interactive(True)
 matplotlib.use('TkAgg')
 
diff --git a/gnuradio-examples/python/pfb/channelize.py b/gnuradio-examples/python/pfb/channelize.py
index f845c05c6..999e5d20e 100755
--- a/gnuradio-examples/python/pfb/channelize.py
+++ b/gnuradio-examples/python/pfb/channelize.py
@@ -21,10 +21,21 @@
 # 
 
 from gnuradio import gr, blks2
-import os, time
-import scipy, pylab
-from scipy import fftpack
-from pylab import mlab
+import sys, time
+
+try:
+    import scipy
+    from scipy import fftpack
+except ImportError:
+    print "Error: Program requires scipy (see: www.scipy.org)."
+    sys.exit(1)
+
+try:
+    import pylab
+    from pylab import mlab
+except ImportError:
+    print "Error: Program requires matplotlib (see: matplotlib.sourceforge.net)."
+    sys.exit(1)
 
 class pfb_top_block(gr.top_block):
     def __init__(self):
diff --git a/gnuradio-examples/python/pfb/chirp_channelize.py b/gnuradio-examples/python/pfb/chirp_channelize.py
index edebf5f59..951255d3b 100755
--- a/gnuradio-examples/python/pfb/chirp_channelize.py
+++ b/gnuradio-examples/python/pfb/chirp_channelize.py
@@ -21,10 +21,21 @@
 # 
 
 from gnuradio import gr, blks2
-import os, time
-import scipy, pylab
-from scipy import fftpack
-from pylab import mlab
+import sys, time
+
+try:
+    import scipy
+    from scipy import fftpack
+except ImportError:
+    print "Error: Program requires scipy (see: www.scipy.org)."
+    sys.exit(1)
+
+try:
+    import pylab
+    from pylab import mlab
+except ImportError:
+    print "Error: Program requires matplotlib (see: matplotlib.sourceforge.net)."
+    sys.exit(1)
 
 class pfb_top_block(gr.top_block):
     def __init__(self):
diff --git a/gnuradio-examples/python/pfb/decimate.py b/gnuradio-examples/python/pfb/decimate.py
index cb5d61b72..643a2c241 100755
--- a/gnuradio-examples/python/pfb/decimate.py
+++ b/gnuradio-examples/python/pfb/decimate.py
@@ -21,14 +21,21 @@
 # 
 
 from gnuradio import gr, blks2
-import os
-import scipy, pylab
-from scipy import fftpack
-from pylab import mlab
-import time
-
-#print os.getpid()
-#raw_input()
+import sys, time
+
+try:
+    import scipy
+    from scipy import fftpack
+except ImportError:
+    print "Error: Program requires scipy (see: www.scipy.org)."
+    sys.exit(1)
+
+try:
+    import pylab
+    from pylab import mlab
+except ImportError:
+    print "Error: Program requires matplotlib (see: matplotlib.sourceforge.net)."
+    sys.exit(1)
 
 class pfb_top_block(gr.top_block):
     def __init__(self):
diff --git a/gnuradio-examples/python/pfb/fmtest.py b/gnuradio-examples/python/pfb/fmtest.py
index 97df0e0f5..635ee4e9e 100755
--- a/gnuradio-examples/python/pfb/fmtest.py
+++ b/gnuradio-examples/python/pfb/fmtest.py
@@ -1,14 +1,42 @@
 #!/usr/bin/env python
 #
+# Copyright 2009 Free Software Foundation, Inc.
+# 
+# This file is part of GNU Radio
+# 
+# GNU Radio is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+# 
+# GNU Radio is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+# 
+
+from gnuradio import gr, blks2
+import sys, math, time
+
+try:
+    import scipy
+    from scipy import fftpack
+except ImportError:
+    print "Error: Program requires scipy (see: www.scipy.org)."
+    sys.exit(1)
+
+try:
+    import pylab
+except ImportError:
+    print "Error: Program requires matplotlib (see: matplotlib.sourceforge.net)."
+    sys.exit(1)
 
 
-from gnuradio import gr, eng_notation
-from gnuradio import blks2
-from gnuradio.eng_option import eng_option
-from optparse import OptionParser
-import math, time, sys, scipy, pylab
-from scipy import fftpack
-
 class fmtx(gr.hier_block2):
     def __init__(self, lo_freq, audio_rate, if_rate):
 
diff --git a/gnuradio-examples/python/pfb/interpolate.py b/gnuradio-examples/python/pfb/interpolate.py
index a7a2522f8..370cf26a7 100755
--- a/gnuradio-examples/python/pfb/interpolate.py
+++ b/gnuradio-examples/python/pfb/interpolate.py
@@ -21,14 +21,21 @@
 # 
 
 from gnuradio import gr, blks2
-import os
-import scipy, pylab
-from scipy import fftpack
-from pylab import mlab
-import time
-
-#print os.getpid()
-#raw_input()
+import sys, time
+
+try:
+    import scipy
+    from scipy import fftpack
+except ImportError:
+    print "Error: Program requires scipy (see: www.scipy.org)."
+    sys.exit(1)
+
+try:
+    import pylab
+    from pylab import mlab
+except ImportError:
+    print "Error: Program requires matplotlib (see: matplotlib.sourceforge.net)."
+    sys.exit(1)
 
 class pfb_top_block(gr.top_block):
     def __init__(self):
diff --git a/gnuradio-examples/python/pfb/resampler.py b/gnuradio-examples/python/pfb/resampler.py
index 6be7cf14e..7b296ca71 100755
--- a/gnuradio-examples/python/pfb/resampler.py
+++ b/gnuradio-examples/python/pfb/resampler.py
@@ -1,7 +1,39 @@
 #!/usr/bin/env python
+#
+# Copyright 2009 Free Software Foundation, Inc.
+# 
+# This file is part of GNU Radio
+# 
+# GNU Radio is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+# 
+# GNU Radio is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+# 
 
 from gnuradio import gr, blks2
-import scipy, pylab
+import sys
+
+try:
+    import scipy
+except ImportError:
+    print "Error: Program requires scipy (see: www.scipy.org)."
+    sys.exit(1)
+
+try:
+    import pylab
+except ImportError:
+    print "Error: Program requires matplotlib (see: matplotlib.sourceforge.net)."
+    sys.exit(1)
 
 class mytb(gr.top_block):
     def __init__(self, fs_in, fs_out, fc, N=10000):
diff --git a/gnuradio-examples/python/pfb/synth_filter.py b/gnuradio-examples/python/pfb/synth_filter.py
index a1562f9ea..074d9cb2c 100755
--- a/gnuradio-examples/python/pfb/synth_filter.py
+++ b/gnuradio-examples/python/pfb/synth_filter.py
@@ -21,7 +21,19 @@
 # 
 
 from gnuradio import gr, blks2
-import scipy, pylab
+import sys 
+
+try:
+    import scipy
+except ImportError:
+    print "Error: Program requires scipy (see: www.scipy.org)."
+    sys.exit(1)
+
+try:
+    import pylab
+except ImportError:
+    print "Error: Program requires matplotlib (see: matplotlib.sourceforge.net)."
+    sys.exit(1)
 
 def main():
     N = 1000000
diff --git a/gnuradio-examples/python/pfb/synth_to_chan.py b/gnuradio-examples/python/pfb/synth_to_chan.py
index 1beda1a54..7e454d903 100755
--- a/gnuradio-examples/python/pfb/synth_to_chan.py
+++ b/gnuradio-examples/python/pfb/synth_to_chan.py
@@ -21,7 +21,19 @@
 # 
 
 from gnuradio import gr, blks2
-import scipy, pylab
+import sys 
+
+try:
+    import scipy
+except ImportError:
+    print "Error: Program requires scipy (see: www.scipy.org)."
+    sys.exit(1)
+
+try:
+    import pylab
+except ImportError:
+    print "Error: Program requires matplotlib (see: matplotlib.sourceforge.net)."
+    sys.exit(1)
 
 def main():
     N = 1000000
diff --git a/gnuradio-examples/python/tags/test_file_tags.py b/gnuradio-examples/python/tags/test_file_tags.py
index 4ff4549ef..446986cd7 100755
--- a/gnuradio-examples/python/tags/test_file_tags.py
+++ b/gnuradio-examples/python/tags/test_file_tags.py
@@ -1,7 +1,33 @@
 #!/usr/bin/env python
+#
+# Copyright 2011 Free Software Foundation, Inc.
+# 
+# This file is part of GNU Radio
+# 
+# GNU Radio is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+# 
+# GNU Radio is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+# 
 
 from gnuradio import gr
-import scipy
+import sys
+
+try:
+    import scipy
+except ImportError:
+    print "Error: Program requires scipy (see: www.scipy.org)."
+    sys.exit(1)
 
 def main():
     data = scipy.arange(0, 32000, 1).tolist()