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-rwxr-xr-xicebox/icebox_diff.py6
1 files changed, 6 insertions, 0 deletions
diff --git a/icebox/icebox_diff.py b/icebox/icebox_diff.py
index 33ac401..e54a0cf 100755
--- a/icebox/icebox_diff.py
+++ b/icebox/icebox_diff.py
@@ -19,6 +19,12 @@ import icebox
import sys
import re
+if len(sys.argv) != 3:
+ print("""
+Usage: icebox_diff bitmap1.txt bitmap2.txt
+""")
+ sys.exit(0)
+
print("Reading file '%s'.." % sys.argv[1])
ic1 = icebox.iceconfig()
ic1.read_file(sys.argv[1])