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Is it possible to get the inverse of this operation:

import dateutil.tz
tz_ny = dateutil.tz.tz.gettz('America/New_York')
print(type(tz_ny))
print(tz_ny)

This prints:

dateutil.tz.tz.tzfile
tzfile('/usr/share/zoneinfo/America/New_York')

How to recover 'America/New_York' given tz_ny of type tzfile?

N.B. tz_ny.tzname(datetime.datetime(2017,1,1)) return 'EST' or 'EDT' if the date is in the summer.

jwqz
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2 Answers2

2

If you want just the timezone name from a tzfile and not the full path, you can e.g. do

import dateutil.tz
tz_ny = dateutil.tz.tz.gettz('America/New_York')

tz_ny_zone= "/".join(tz_ny._filename.split('/')[-2:])

print(tz_ny_zone)

which gets you

'America/New_York'

EDIT: Just for the sake of completeness, since the title only mentions tzfile: Besides dateutil there are other modules which can be used to get a tzfile. One way is using timezone() from the pytz module:

import pytz

tz_ny_pytz = pytz.timezone('America/New_York')

Depending on which module you used in the first place, the class of tzfile differs

print(type(tz_ny))
print(type(ty_ny_pytz))

prints

<class 'dateutil.tz.tz.tzfile'>
<class 'pytz.tzfile.America/New_York'>

For the pytz object, there is a more direct way of accessing the timezone in human readable form, using the .zone attribute:

print(tz_ny_pytz.zone)

produces

'America/New_York'
buddemat
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1

Turns out that there is a protected member variable....

tz_ny._filename

is

'/usr/share/zoneinfo/America/New_York'
jwqz
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