Function for examine content of directory

[Tigerstyle]

Thanks, just what I was looking for :-)

T

kl. 17:20:27 UTC+2 torsdag 6. september 2012 skrev MRAB følgende:
> On 06/09/2012 15:56, Tigerstyle wrote:
> 
> > Hi guys,
> 
> >
> 
> > I'm trying to write a module containing a function to examine the contents of the current working directory and print out a count of how many files have each extension (".txt", ".doc", etc.)
> 
> >
> 
> > This is the code so far:
> 
> > --
> 
> > import os
> 
> >
> 
> > path = "v:\\workspace\\Python2_Homework03\\src\\"
> 
> > dirs = os.listdir( path )
> 
> > filenames = {"this.txt", "that.txt", "the_other.txt","this.doc","that.doc","this.pdf","first.txt","that.pdf"}
> 
> > extensions = []
> 
> > for filename in filenames:
> 
> >      f = open(filename, "w")
> 
> >      f.write("Some text\n")
> 
> >      f.close()
> 
> >      name , ext = os.path.splitext(f.name)
> 
> >      extensions.append(ext)
> 
> >
> 
> > # This would print all the files and directories
> 
> > for file in dirs:
> 
> >      print(file)
> 
> >
> 
> > for ext in extensions:
> 
> >      print("Count for %s: " %ext, extensions.count(ext))
> 
> >
> 
> > --
> 
> >
> 
> > When I'm trying to get the module to print how many files each extension has, it prints the count of each ext multiple times for each extension type. Like this:
> 
> >
> 
> > this.pdf
> 
> > the_other.txt
> 
> > this.doc
> 
> > that.txt
> 
> > this.txt
> 
> > that.pdf
> 
> > first.txt
> 
> > that.doc
> 
> > Count for .pdf:  2
> 
> > Count for .txt:  4
> 
> > Count for .doc:  2
> 
> > Count for .txt:  4
> 
> > Count for .txt:  4
> 
> > Count for .pdf:  2
> 
> > Count for .txt:  4
> 
> > Count for .doc:  2
> 
> >
> 
> That's because each extension can occur multiple times in the list.
> 
> 
> 
> Try the Counter class:
> 
> 
> 
> from collections import Counter
> 
> 
> 
> for ext, count in Counter(extensions).items():
> 
>      print("Count for %s: " % ext, count)