anatta anatta wrote:
> Here is my working code - to copy files from one drive to another.
>
> I however want to copy selective files.
>
> For example I like to copy only .txt files only from the source to
> destination, and not other types of files.
>
> How could I do this selective copying?
Such a question almost answers itself when you put a bit more structure into
your code. You might write a generator that produces (sourcefile, destfile)
pairs and a copyfile() function that performs the same checks you have
inlined in your code below. A sketch of the resulting stript:
def filepairs(sourcefolder, destfolder):
for root, dirs, files in os.walk(sourcefolder):
for name in files:
sourcefile = ...
destfile = ...
yield sourcefile, destfile
def copyfile(sourcefile, destfile):
if not os.path.isfile(destfile):
... # copy
else:
... # complain
for sourcefile, destfile in filepairs("H://", "O://test_o"):
copyfile(sourcefile, destfile)
To copy only select files you have to add a check to the for loop:
for sourcefile, destfile in filepairs(...):
if copy_wanted(sourcefile):
copyfile(sourcefile, destfile)
Now you can experiment with various implementations of that function without
touching the bulk of your code. To copy only text files it might look like
this
def copy_wanted(sourcefile):
return os.path.splitext(sourcefile)[0] == ".txt"
... or this
def predicate_from_glob(glob):
def is_match(filename):
return fnmatch.fnmatch(filename, glob)
return is_match
copy_wanted = predicate_from_glob("*.txt")
... or something completely different like, say, a check based on the MIME
type.
>
> Thanks in advance for the hints.
>
>
> Best,
>
> Kumar.
>
>
> # -*- coding: utf-8 -*-
> """
> Created on Wed Jun 01 17:05:07 2016
>
> @author: anatta
> """
>
> import os
> import shutil
> sourcePath = r'H://'
> destPath = r'O://test_o/'
> ls=os.listdir('.')#list current dir
> #print('listing current dir\n')
> #print(ls)
> for root, dirs, files in os.walk(sourcePath):
>
> #figure out where we're going
> dest = destPath + root.replace(sourcePath, '')
>
> #if we're in a directory that doesn't exist in the destination folder
> #then create a new folder
> if not os.path.isdir(dest):
> os.mkdir(dest)
> print 'Directory created at: ' + dest
>
> #loop through all files in the directory
> for f in files:
>
> #compute current (old) & new file locations
> oldLoc = root + '\\' + f
> newLoc = dest + '\\' + f
>
> if not os.path.isfile(newLoc):
> try:
> shutil.copy2(oldLoc, newLoc)
> print 'File ' + f + ' copied.'
> except IOError:
> print 'file "' + f + '" already exists'
>
>
> ___
>
>
> _______________________________________________
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