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Python: Set the default timezone used by all date/time functions

Python Datetime: Exercise-54 with Solution

Write a Python program to set the default timezone used by all date/time functions.

Sample Solution:

Python Code:

import os, time
print(time.strftime('%Y-%m-%d %H:%M:%S')) # before timezone change
os.environ['TZ'] = 'America/Los_Angeles' # set new timezone
time.tzset()
print(time.strftime('%Y-%m-%d %H:%M:%S')) # after timezone change

Sample Output: 

2020-07-21 13:09:47
2020-07-21 06:09:47

Flowchart:

Flowchart: Set the default timezone used by all date/time functions.

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Previous: Write a Python program to get the first and last second.
Next: The epoch is the point where the time starts, and is platform dependent. For Unix, the epoch is January 1, 1970, 00:00:00 (UTC). Write a Python program to find out what the epoch is on a given platform. Also convert a given time in seconds since the epoch.

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Python: Tips of the Day

Find current directory and file's directory:

To get the full path to the directory a Python file is contained in, write this in that file:

import os 
dir_path = os.path.dirname(os.path.realpath(__file__))

(Note that the incantation above won't work if you've already used os.chdir() to change your current working directory, since the value of the __file__ constant is relative to the current working directory and is not changed by an os.chdir() call.)

To get the current working directory use

import os
cwd = os.getcwd()

Documentation references for the modules, constants and functions used above:

  • The os and os.path modules.
  • The __file__ constant
  • os.path.realpath(path) (returns "the canonical path of the specified filename, eliminating any symbolic links encountered in the path")
  • os.path.dirname(path) (returns "the directory name of pathname path")
  • os.getcwd() (returns "a string representing the current working directory")
  • os.chdir(path) ("change the current working directory to path")

Ref: https://bit.ly/3fy0R6m