Madhavan Bomidi wrote:
> I am using the following command line to sort the files:
>
> import glob
> a = sorted(glob.glob('3RIMG_*.h5')
>
> Following is the result:
>
> 3RIMG_01APR2018_0514_L2G_AOD.h5
> 3RIMG_01APR2018_0544_L2G_AOD.h5
> 3RIMG_01APR2018_0644_L2G_AOD.h5
> 3RIMG_01APR2018_0714_L2G_AOD.h5
> 3RIMG_01APR2018_0744_L2G_AOD.h5
> 3RIMG_01MAY2018_0515_L2G_AOD.h5
> 3RIMG_01MAY2018_0545_L2G_AOD.h5
> 3RIMG_01MAY2018_0615_L2G_AOD.h5
> 3RIMG_01MAY2018_0645_L2G_AOD.h5
> 3RIMG_01MAY2018_0715_L2G_AOD.h5
> 3RIMG_01MAY2018_0745_L2G_AOD.h5
> 3RIMG_01MAY2018_0815_L2G_AOD.h5
> 3RIMG_02APR2018_0514_L2G_AOD.h5
> 3RIMG_02APR2018_0544_L2G_AOD.h5
> 3RIMG_02APR2018_0614_L2G_AOD.h5
> 3RIMG_02APR2018_0644_L2G_AOD.h5
> 3RIMG_02APR2018_0714_L2G_AOD.h5
> 3RIMG_02APR2018_0744_L2G_AOD.h5
> 3RIMG_02APR2018_0814_L2G_AOD.h5
> 3RIMG_02MAY2018_0515_L2G_AOD.h5
> 3RIMG_02MAY2018_0545_L2G_AOD.h5
> 3RIMG_02MAY2018_0615_L2G_AOD.h5
> 3RIMG_02MAY2018_0645_L2G_AOD.h5
> 3RIMG_02MAY2018_0715_L2G_AOD.h5
> 3RIMG_02MAY2018_0745_L2G_AOD.h5
> 3RIMG_02MAY2018_0815_L2G_AOD.h5
> 3RIMG_31MAR2018_0514_L2G_AOD.h5
> 3RIMG_31MAR2018_0544_L2G_AOD.h5
> 3RIMG_31MAR2018_0614_L2G_AOD.h5
> 3RIMG_31MAR2018_0644_L2G_AOD.h5
> 3RIMG_31MAR2018_0714_L2G_AOD.h5
> 3RIMG_31MAR2018_0744_L2G_AOD.h5
>
> As you can see from the list of files displayed after sorting, the files
> are not arranged according to the increasing order of the date since the
> date is in the DDMMMYYYY format.
>
> Can anyone suggest me how I can sort theses files in increasing order of
> the date on the file name?
Use a key function
filenames = sorted(filename, key=get_datetime)
get_datetime should extract date/time from the filename into a datetime
object. The names will then be ordered according to the datetimes' values:
import glob
import datetime
def get_datetime(filename):
parts = filename.split("_")
return datetime.datetime.strptime(parts[1] + parts[2], "%d%b%Y%H%M")
filenames = sorted(glob.glob('3RIMG_*.h5'), key=get_datetime)
for fn in filenames:
print(fn)
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