Console from Sept 27, 2011
CompSci 6


strand = 'cgcgcgaaattt'
length = len(strand)
xx = [1 for ch in strand]
yy = [ch+ch for ch in strand]
zz = [3 for silly in strand]
print xx
[1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]


print sum(xx)
12


print yy
['cc', 'gg', 'cc', 'gg', 'cc', 'gg', 'aa', 'aa', 'aa', 'tt', 'tt', 'tt']


print zz
[3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3]


[silly+silly for silly in strand]
['cc', 'gg', 'cc', 'gg', 'cc', 'gg', 'aa', 'aa', 'aa', 'tt', 'tt', 'tt']


print sum([1 for ch in strand if ch == 'g' or ch == 'c'])
6


print strand
cgcgcgaaattt

print [nutsy*5 for nutsy in strand]
['ccccc', 'ggggg', 'ccccc', 'ggggg', 'ccccc', 'ggggg', 'aaaaa', 'aaaaa', 'aaaaa', 'ttttt', 'ttttt', 'ttttt']


words = ['zebra', 'bear', 'cow', 'dog']

print length   # note this is the length from way above,   length = len(strand)
12


len(words)
4


[w for w in words if len(w)== 3]
['cow', 'dog']


[len(w) for w in words if len(w)== 3]
[3, 3]


['x' for w in words if len(w)== 3]
['x', 'x']


[w+"ay" for w in words if len(w)== 3]
['coway', 'dogay']