CODEWITHSUNDEEP
pythonfiledatetimedirectory
Eos Antigen
Eos Antigen

Reputation: 388

Pattern matching for current year and month in filename

I have this initial bit to extract the current month and year value.

The goal is to find (and remove) all files in a log file directory with a name format of 'access.log.2017-11' if the month does not match the current month. 

log_file_dir = '/home/eos/test/dir'

cur_date = datetime.date.today() 
cur_month = cur_date.strftime('%m') # returns '11', '03'...
cur_year = cur_date.strftime('%Y') # returns 2001, 2017...

I tried with glob but it doesn't seem to make a match for what I had in mind likewise:

os.chdir(log_file_dir)
glob.glob('./.log.cur_year-cur_month') # nope, not working

Is there anywhere that the var names like 'cur_year' can be inserted in a pattern matching expression so that it will find them?

Upvotes: 2

Views: 1659

Answers (3)

Martin Evans
Martin Evans

Reputation: 46759

You need a glob pattern *.log.2017-11, this can be created as follows:

from datetime import datetime
import glob

log_file_dir = '/home/eos/test/dir'
log_file_dir = r'e:\python temp'
cur_date = datetime.today().strftime('%Y-%m')

for filename in glob.glob(os.path.join(log_file_dir, '*.log.{}'.format(cur_date))):
    os.remove(filename)

Upvotes: 1

Eric Duminil
Eric Duminil

Reputation: 54223

glob.glob('./.log.cur_year-cur_month')

there's no formatting, no string interpolation or any wildcard. It means that glob will look for exactly one file, which is literally './.log.cur_year-cur_month'. This file probably isn't in your folder.

You could use:

cur_date.strftime('*.log.%Y-%m')

as the glob pattern. It should give you every file ending with .log.2017-11.

Upvotes: 1

Marv
Marv

Reputation: 163

When you write './.log.cur_year-cur_month' it is considered as a whole string. If you want to use the variables you have to concatenate them with the string and not putting them into quotes : './.log.' + cur_year + '-' + cur_month

Upvotes: 1

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