CODEWITHSUNDEEP
pythonpython-2.7
ivanhoifung
ivanhoifung

Reputation: 349

Python strings and integer

I have a .csv file with data like this:

uc007ayl.1,ENSMUSG00000041439

uc009mkn.1,ENSMUSG00000031708

uc009mkn.1,ENSMUSG00000035491

I have some codes that read them column by column

    import csv
    import os.path
    #open files + readlines
    with open("C:/Users/Ivan Wong/Desktop/Placement/Lists of targets/Mouse/UCSC to Ensembl.csv", "r") as f:
        reader = csv.reader(f, delimiter = ',')
        #find files with the name in 1st row
        for row in reader:
            graph_filename = os.path.join("C:/Users/Ivan Wong/Desktop/Placement/Interesting reading/3'ORF",row[0]+"_nt_counts.txt.png")
            if os.path.exists(graph_filename):
                y = row[0]+'_nt_counts.txt'  
                r = open('C:/Users/Ivan Wong/Desktop/Placement/fp_mesc_nochx/'+y, 'r')
                k = r.readlines()
                r.close
                del k[:1]
                k = map(lambda s: s.strip(), k)
                interger = map(int, k)   
                import iter

tools
            #adding the numbers for every 3 rows
            def grouper(n, iterable, fillvalue=None):
                "grouper(3, 'ABCDEFG', 'x') --> ABC DEF Gxx"
                args = [iter(iterable)] * n
                return itertools.izip_longest(*args, fillvalue=fillvalue)
            result = map(sum, grouper(3, interger, 0))
            e = row[1]

Now I can say 

print row[1]

to make it show the 2nd column only. I needed to do this because I will be finding these names in another file. But I have a problem because I think python is reading those names in this way:

"E", "N", "S", "M", "U", "S" etc.

This causes a problem now because I won't able to find the match names from another folder. Anyone know where is the problem and how to fix it?

Upvotes: 1

Views: 143

Answers (1)

jfs
jfs

Reputation: 414149

row[1] is not the whole second column of the file. It is just the second field in the current row i.e., just one of many values in the second column.

row[1] is a string in your case. Strings in Python are also sequences; you can call len(some_string) to find out length of string, take an element at a given position pos: some_string[pos], etc.

Upvotes: 2

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