+ 4 - 5 | § ¶Python gzip/gunzip utility
If you are a person like me who likes to read books in html format, you sure would have lot of soft books. These books occupy a lot of diskspace because they are small files and just text. Apache's transparent decompression (mod_deflate) is a good solution to read these books while keeping them compressed.
Hence this small utility which'll gunzip/gzip all your html/text files on all Python supported platforms. Hope you find it useful.
Note: There is a small bug in this script where giving a . as the path ends up in some error. I haven't tried looking much into it. Hence please give absolute path when using it. Eg: /tmp, C:\books et cetera.
#!/usr/bin/env python
import os, sys, gzip, string, tempfile
class ZipManipulator:
"""This class does the work of manipulating gz files.
Pass the repository as an argument during instantiation."""
def __init__(self, input):
self.repository = input
def files(self, root):
for path, folders, files in os.walk(root):
for file in files:
yield path, file
def starter(self, filetype, work_type):
'''Does the gzipping or gunzipping of given files.
work_type -> 0 is for gzip
work_type -> 1 is for gunzip
fileype -> is the type of file. Eg: html, txt, html.gz, txt.gz, HTML.gz et cetera'''
for path, file in self.files(self.repository):
#for path, file in files(repository):
if file.endswith(filetype):
if work_type == 0:
os.chdir(os.path.realpath(path))
ZipManipulator.gzip(self, file)
elif work_type == 1:
os.chdir(os.path.realpath(path))
ZipManipulator.gunzip(self, file)
else:
sys.stdout.write("Incorrect work type passed.\n")
def gzip(self, file):
'''Gzip the given file and then remove the file.'''
r_file = open(file, 'r')
w_file = gzip.GzipFile(file + '.gz', 'w', 9)
w_file.write(r_file.read())
w_file.flush()
w_file.close()
r_file.close()
os.unlink(file) #We don't need the file now
sys.stdout.write("%s gzipped.\n" % (file))
def gunzip(self, file):
'''Gunzip the given file and then remove the file.'''
r_file = gzip.GzipFile(file, 'r')
write_file = string.rstrip(file, '.gz')
w_file = open(write_file, 'w')
w_file.write(r_file.read())
w_file.close()
r_file.close()
os.unlink(file) # Yes this one too.
sys.stdout.write("%s gunzipped.\n" % (file))
def main():
repository = raw_input("Enter the repository path: ")
if repository == "":
repository = os.curdir
filetype = raw_input("Enter the filetype: ")
zip_type = int(raw_input("Enter 0 for gzip and 1 for gunzip: "))
instance = ZipManipulator(repository)
instance.starter(filetype, zip_type)
if __name__ == '__main__':
main()
You can download the script here. gz-1.py
Keywords: gzip,gunzip,python
+ 4 - 4 | § ¶Happy Birthday KDE
+ 5 - 3 | § ¶ctime, atime and mtime
ctime, atime and mtime
It is important to distinguish between a file or directory's change time (ctime), access time (atime), and modify time (mtime).
ctime -- In UNIX, it is not possible to tell the actual creation time of a file. The ctime--change time--is the time when changes were made to the file or directory's inode (owner, permissions, etc.). It is needed by the dump command to determine if the file needs to be backed up. You can view the ctime with the ls -lc command.
atime -- The atime--access time--is the time when the data of a file was last accessed. Displaying the contents of a file or executing a shell script will update a file's atime, for example. You can view the atime with the ls -lu command.
mtime -- The mtime--modify time--is the time when the actual contents of a file was last modified. This is the time displayed in a long directoring listing (ls -l).
In Linux, the stat command will show these three times.
This text was taken from bhutch's site.
Keywords: ctime,atime,mtime