Hi all,
All I would like to do is take a file and count the number of times a
letter occurs in it. It so happens that there letters are amino acids.
There are also some other checks in the script but these are not a
concern just yet.
What I would like to do is create a dictionary of arrays.
In perl (my current scripting language of choice) I would simply put:
${$dictionary{$key}}[$element] += 1
I have no idea how to create this kind of structure in python.
Also I have a while loop. If this were perl, rather than using the i =
0 while(i < len(x)):
I would do : for (my $i = 0; $i < @array; $i++) {}. I have found the
range function but I am not sure how to use it properly.
What I would like to do is create an index that allows me to access the
same element in two arrays (lists) of identical size.
I have pasted in my current code below, I would be very grateful if you
could help me trim up this code.
#!/usr/bin/python
import sys, os
structDir = '/home/danny/dataset/structure/'
seqDir = '/home/danny/dataset/sequence/'
target = sys.argv[1]
seqFile = seqDir + target
strFile = structDir + target
seqDictionary = {}
if (os.path.isfile(seqFile) and os.path.isfile(strFile)):
structureHandle = open(strFile)
structureString = structureHandle.readline()
sequenceHandle = open(seqFile)
sequenceString = sequenceHandle.readline()
strArray = list(structureString)
seqArray = list(sequenceString)
if len(strArray) == len(seqArray):
print "Length match\n"
i=0
while(i < len(strArray)):
if seqDictionary.has_key(seqArray[i]):
seqDictionary[seqArray[i]] += 1
else:
seqDictionary[seqArray[i]] = 1
i += 1
else:
print "Some data is missing!\n"
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