Python substring extraction issue

Question

I try to run a simple code for substring extraction from string

def main():

    fld='20191201234559'

    yyyy=fld[:4]
    mm=fld[4:2]
    dd=fld[6:2]
    hh=fld[8:2]
    hm=fld[10:2]
    hs=fld[12:2]
    print("res", yyyy,mm,dd,hh,hm,hs)


if __name__ == "__main__":
    main()

Output:

res 2019

Substring with [a:b] return nothing.

It's happened on
- Windows 10: python ver 3.7.5 - Ubuntu 18.04: python ver 3.6.9

As result I use this code:

def main():

    fld='20191201234559'

    yyyy=fld[:4]
    mm=fld[4]+fld[5]
    dd=fld[6]+fld[7]
    hh=fld[8]+fld[9]
    hm=fld[10]+fld[11]
    hs=fld[12]+fld[13]
    print("res", yyyy, mm, dd, hh, hm, hs)


if __name__ == "__main__":
    main()

Output

res 2019 12 01 23 45 59

What's wrong with substring extraction?

Does this answer your question? [Understanding slice notation](https://stackoverflow.com/questions/509211/understanding-slice-notation) — DeepSpace, Jan 05 '20 at 12:58

score 0 · Answer 1 · answered Jan 05 '20 at 18:47

Corrected and working properly

def main():

    fld='20191201234559'

    yyyy=fld[:4]
    mm=fld[4:6]
    dd=fld[6:8]
    hh=fld[8:10]
    hm=fld[10:12]
    hs=fld[12:14]
    print("res", yyyy,mm,dd,hh,hm,hs)


if __name__ == "__main__":
    main()

Python substring extraction issue

1 Answers1