On Sun, 27 Mar 2005 14:39:06 -0800, James Stroud
<[EMAIL PROTECTED]> wrote:
>Hello,
>
>I have strings represented as a combination of an alphabet (AGCT) and a an
>operator "/", that signifies degeneracy. I want to split these strings into
>lists of lists, where the degeneracies are members of the same list and
>non-degenerates are members of single item lists. An example will clarify
>this:
>
>"ATT/GATA/G"
>
>gets split to
>
>[['A'], ['T'], ['T', 'G'], ['A'], ['T'], ['A', 'G']]
Here's two ways without using regular expression. Both about the
same.
s = list("ATT/GATA/G")
result = []
while len(s)>0:
a = [s.pop(0)]
if s[0] == '/':
b = s.pop(0)
a.append(s.pop(0))
result.append(a)
print result
[['A'], ['T'], ['T', 'G'], ['A'], ['T'], ['A', 'G']]
s = "ATT/GATA/G"
result = []
while len(s)>0:
if s[1:2] == '/':
result.append([s[0],s[2]])
s = s[3:]
else:
result.append([s[0]])
s = s[1:]
print result
[['A'], ['T'], ['T', 'G'], ['A'], ['T'], ['A', 'G']]
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