Pysftp。 根据修改日期获取文件

Question

I'm trying to write a script to retrieve files from an SFTP server if the modification date is less than 24 hours. This is my attempt so far:

cnopts = sftp.CnOpts()
cnopts.hostkeys = None
s = sftp.Connection(host=host, username=username, password=password, port=port, cnopts=cnopts)
s.cwd(r"/Outbox")
for attr in s.listdir_attr("ENTOUT_709_Payers_20170802024203.csv"):
    print(attr)

Here are the results...

?rw-rw-rw- 1 0 0 8339 02 Aug 02:42 ENTOUT_709_Payers_20170802024203.csv

How would I retrieve "02 Aug 02:42" in the format of %Y%M%d?

Answer 1

You can parse the date string you get back from the ftp directory listing like this:

import datetime
input_date = "02 Aug 02:42"
parsed_date = datetime.datetime.strptime(input_date,"%d %b %H:%M").replace(year=2017)
print(f"{parsed_date:%Y%m%d}")

Output is 20170802 .

Answer 2

I have a substitute for it:

def unix2human(unixtime, fmt = "%Y-%m-%d"):
    try:
        return datetime.utcfromtimestamp(int(unixtime)).strftime(fmt)
    except Exception as e:
        log.warning("Failed to convert unixtime string '{}' :: {}".format(unixtime, e))
        return None

So your code will look like:

for attr in s.listdir_attr("ENTOUT_709_Payers_20170802024203.csv"):
    print(unix2human(attr.st_mtime))

where st_mtime is the built-in pysftp method