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-rwxr-xr-xgr-trellis/src/examples/python/test_tcm_bit.py6
1 files changed, 5 insertions, 1 deletions
diff --git a/gr-trellis/src/examples/python/test_tcm_bit.py b/gr-trellis/src/examples/python/test_tcm_bit.py
index 7147902380..873d58684b 100755
--- a/gr-trellis/src/examples/python/test_tcm_bit.py
+++ b/gr-trellis/src/examples/python/test_tcm_bit.py
@@ -2,7 +2,6 @@
from gnuradio import gr
from gnuradio import trellis, digital
-from gnuradio import analog
from gnuradio import eng_notation
import math
import sys
@@ -11,6 +10,11 @@ import fsm_utils
from gnuradio.eng_option import eng_option
from optparse import OptionParser
+try:
+ from gnuradio import analog
+except ImportError:
+ sys.stderr.write("Error: Program requires gr-analog.\n")
+ sys.exit(1)
def run_test (f,Kb,bitspersymbol,K,dimensionality,constellation,N0,seed):
tb = gr.top_block ()