Question

I wrote a program that merges several text files together, and from there, I am trying to add dates to the first column using a for loop since there are several different dates. Using these loops though, the program doesn’t seem to iterate properly.

The supporting text files have a list of times without dates; however, each text file is associated with a different date. I am merging all of the text files together into one text file for easier use, though to make it useful, I am trying to add the dates to the times, which appears in the first column of the text file.

Here’s what the code looks like:

    import glob
    from datetime import *
    mon = [6, 7]
    dayrange1 = [24, 25, 26, 27, 28, 29, 30]
    dayrange2 = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

    m = 0
    d1 = 0
    d2 = 0
    newline = []



    fout = open("C:\\Users\\jessica.macleod\\Desktop\\SurmontArray1.txt", "a")
    for filename in glob.glob("C:\\Users\\jessica.macleod\\Desktop\\Surmont Noise Files\\s1-424surmontnoise2012*.txt"):
        f = open(filename)
        f.next()
        f.next()
        d1 = 0
        d2 = 0
        for months in mon:

            if m == 0:

                for days in dayrange1:

                    for line in f:
                        line += str(date(2012, mon[m], dayrange1[d1])) + " "
                        fout.write(line)
                    d1 = d1 + 1
                m = m + 1


            if m == 1:

                for days in dayrange2:

                    for line in f:
                        line += str(date(2012, mon[m], dayrange2[d2])) + " "
                        fout.write(line)
                    d2 = d2 + 1




        f.close()
    fout.close()

Answer 1

dayrange1 is not iterated over in the second loop of for months in mon because you have set m to 1. It is skipped because it is guarded by the conditional if m == 0:. This means that only the very first matched filename in your glob will have the results of iterating over dayrange1. You’ll need to reset m to 0 inside of one of your loops.

Also, you iterate over days in daterange1. During the first iteration of that loop you iterate over the entire contents of f. That means on the second iteration over daterange1 the file is used up.

Also, you don’t use days inside of your loop.