This module provides a few functions for creating archive files, such as tarballs or zipfiles.
| base_name, format[, root_dir= None, base_dir=None, verbose=0, dry_run=0]) | 
zip or tar).  base_name 
is the name of the file to create, minus any format-specific extension; 
format is the archive format: one of zip, tar, 
ztar, or gztar.
root_dir is a directory that will be the root directory of the
archive; ie. we typically chdir into root_dir before 
creating the archive.  base_dir is the directory where we start 
archiving from; ie. base_dir will be the common prefix of all files and
directories in the archive.  root_dir and base_dir both default
to the current directory.  Returns the name of the archive file.
Warning: This should be changed to support bz2 files
| base_name, base_dir[, compress= 'gzip', verbose=0, dry_run=0]) | 
'gzip' (the default), 
'compress', 'bzip2', or None.  Both tar
and the compression utility named by compress must be on the 
default program search path, so this is probably Unix-specific.  The 
output tar file will be named base_dir.tar, possibly plus
the appropriate compression extension (.gz, .bz2 or
.Z).  Return the output filename.
Warning: This should be replaced with calls to the tarfile module.
| base_name, base_dir[, verbose= 0, dry_run=0]) | 
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