On 30/12/05, rbt <[EMAIL PROTECTED]> wrote:
You don't need to store each file's updated time, you only need to store the last time you ran the script and to compare each file's modified time against that last-run time. Dictionaries aren't required
eg:
# to get files changed (added/modified) since a given date
import time, os
last_run = time.time() - (60*60*24*30*12) # for testing, set to one year ago
changed = [x for x in os.listdir('c:/python24') if os.path.getmtime(os.path.join('c:/python24' , x)) > last_run]
# script end
>From your previous posts, I believe you are storing details of *every* file within a dictionary that is pickled to your hard disk, then periodically creating a new dict of *every* file and comparing it against the original dict. Then you must be updating the original dict with the new times and storing it back to disk. The above list comprehension will give the same result for files/dirs in a single directory, you just need to store the time of the last script run to disk instead.
if you are walking several directories, the principle is the same,
>>> last_run = time.time() - (60*60*24*30) # 1 month ago
>>> for root, dirs, files in os.walk('c:/python24'):
... for name in files:
... if os.path.getmtime(os.path.join(root , name)) > last_run:
... print os.path.join(root , name)
...
c:/python24\Lib\asynchat.pyc
c:/python24\Lib\calendar.pyc
c:/python24\Lib\gzip.pyc
c:/python24\Lib\imghdr.pyc
c:/python24\Lib\SimpleHTTPServer.pyc
c:/python24\Lib\sndhdr.pyc
c:/python24\Lib\webbrowser.pyc
c:/python24\Lib\_strptime.pyc
c:/python24\Lib\email\MIMEAudio.pyc
c:/python24\Lib\email\MIMEImage.pyc
c:/python24\Lib\email\MIMEMessage.pyc
c:/python24\Lib\email\MIMEMultipart.pyc
>>>
What's a good way to compare values in dictionaries? I want to find
[snip]
My key-values pairs are filepaths and their modify times. I want to
identify files that have been updated or added since the script last ran.
You don't need to store each file's updated time, you only need to store the last time you ran the script and to compare each file's modified time against that last-run time. Dictionaries aren't required
eg:
# to get files changed (added/modified) since a given date
import time, os
last_run = time.time() - (60*60*24*30*12) # for testing, set to one year ago
changed = [x for x in os.listdir('c:/python24') if os.path.getmtime(os.path.join('c:/python24' , x)) > last_run]
# script end
>From your previous posts, I believe you are storing details of *every* file within a dictionary that is pickled to your hard disk, then periodically creating a new dict of *every* file and comparing it against the original dict. Then you must be updating the original dict with the new times and storing it back to disk. The above list comprehension will give the same result for files/dirs in a single directory, you just need to store the time of the last script run to disk instead.
if you are walking several directories, the principle is the same,
>>> last_run = time.time() - (60*60*24*30) # 1 month ago
>>> for root, dirs, files in os.walk('c:/python24'):
... for name in files:
... if os.path.getmtime(os.path.join(root , name)) > last_run:
... print os.path.join(root , name)
...
c:/python24\Lib\asynchat.pyc
c:/python24\Lib\calendar.pyc
c:/python24\Lib\gzip.pyc
c:/python24\Lib\imghdr.pyc
c:/python24\Lib\SimpleHTTPServer.pyc
c:/python24\Lib\sndhdr.pyc
c:/python24\Lib\webbrowser.pyc
c:/python24\Lib\_strptime.pyc
c:/python24\Lib\email\MIMEAudio.pyc
c:/python24\Lib\email\MIMEImage.pyc
c:/python24\Lib\email\MIMEMessage.pyc
c:/python24\Lib\email\MIMEMultipart.pyc
>>>
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