1 files changed, 0 insertions, 93 deletions
diff --git a/Demo/classes/Rev.py b/Demo/classes/Rev.py
deleted file mode 100644
index d36ddb9..0000000
--- a/Demo/classes/Rev.py
+++ /dev/null
@@ -1,93 +0,0 @@
-'''
-A class which presents the reverse of a sequence without duplicating it.
-From: "Steven D. Majewski" <sdm7g@elvis.med.virginia.edu>
-
-It works on mutable or inmutable sequences.
-
->>> Rev('Hello World!')
-!dlroW olleH
-
-The .forw is so you can use anonymous sequences in __init__, and still
-keep a reference the forward sequence. )
-If you give it a non-anonymous mutable sequence, the reverse sequence
-will track the updated values. ( but not reassignment! - another
-good reason to use anonymous values in creating the sequence to avoid
-confusion. Maybe it should be change to copy input sequence to break
-the connection completely ? )
-
->>> nnn = list(range(3))
->>> rnn = Rev(nnn)
->>> for n in rnn: n
-...
-2
-1
-0
->>> for n in range(4, 6): nnn.append(n)   # update nnn
-...
->>> for n in rnn: n     # prints reversed updated values
-...
-5
-4
-2
-1
-0
->>> nnn = nnn[1:-1]
->>> nnn
-[1, 2, 4]
->>> for n in rnn: n     # prints reversed values of old nnn
-...
-5
-4
-2
-1
-0
-
-#
->>> WH = Rev('Hello World!')
->>> print(WH.forw, WH.back)
-Hello World! !dlroW olleH
->>> nnn = Rev(list(range(1, 10)))
->>> print(nnn.forw)
-[1, 2, 3, 4, 5, 6, 7, 8, 9]
->>> print(nnn.back)
-[9, 8, 7, 6, 5, 4, 3, 2, 1]
-
->>> Rev(nnn)
-<1, 2, 3, 4, 5, 6, 7, 8, 9>
-
-'''
-
-class Rev:
-    def __init__(self, seq):
-        self.forw = seq
-        self.back = self
-
-    def __len__(self):
-        return len(self.forw)
-
-    def __getitem__(self, j):
-        return self.forw[-(j + 1)]
-
-    def __repr__(self):
-        seq = self.forw
-        if isinstance(seq, list):
-            wrap = '[]'
-            sep = ', '
-        elif isinstance(seq, tuple):
-            wrap = '()'
-            sep = ', '
-        elif isinstance(seq, str):
-            wrap = ''
-            sep = ''
-        else:
-            wrap = '<>'
-            sep = ', '
-        outstrs = [str(item) for item in self.back]
-        return wrap[:1] + sep.join(outstrs) + wrap[-1:]
-
-def _test():
-    import doctest, Rev
-    return doctest.testmod(Rev)
-
-if __name__ == "__main__":
-    _test()