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diff --git a/sys/src/cmd/python/Demo/comparisons/regextest.py b/sys/src/cmd/python/Demo/comparisons/regextest.py
deleted file mode 100755
index b27d741d7..000000000
--- a/sys/src/cmd/python/Demo/comparisons/regextest.py
+++ /dev/null
@@ -1,47 +0,0 @@
-#! /usr/bin/env python
-
-# 1)  Regular Expressions Test
-#
-#     Read a file of (extended per egrep) regular expressions (one per line),
-#     and apply those to all files whose names are listed on the command line.
-#     Basically, an 'egrep -f' simulator.  Test it with 20 "vt100" patterns
-#     against a five /etc/termcap files.  Tests using more elaborate patters
-#     would also be interesting.  Your code should not break if given hundreds
-#     of regular expressions or binary files to scan.
-
-# This implementation:
-# - combines all patterns into a single one using ( ... | ... | ... )
-# - reads patterns from stdin, scans files given as command line arguments
-# - produces output in the format <file>:<lineno>:<line>
-# - is only about 2.5 times as slow as egrep (though I couldn't run
-#   Tom's test -- this system, a vanilla SGI, only has /etc/terminfo)
-
-import string
-import sys
-import re
-
-def main():
-    pats = map(chomp, sys.stdin.readlines())
-    bigpat = '(' + '|'.join(pats) + ')'
-    prog = re.compile(bigpat)
-
-    for file in sys.argv[1:]:
-        try:
-            fp = open(file, 'r')
-        except IOError, msg:
-            print "%s: %s" % (file, msg)
-            continue
-        lineno = 0
-        while 1:
-            line = fp.readline()
-            if not line:
-                break
-            lineno = lineno + 1
-            if prog.search(line):
-                print "%s:%s:%s" % (file, lineno, line),
-
-def chomp(s):
-    return s.rstrip('\n')
-
-if __name__ == '__main__':
-    main()