Write a python function matching the docstring below. You do not have to include the docstring in your solution. The function should convert a time (string) in Eastern Standard Time (EST) to Pacific Standard Time (PST).  PST is 3 hours behind EST.  ''' FUNCTION -- est_to_pst Takes a time in Eastern Standard Time (EST) and converts it to Pacific Standard Time (PST). All times use the 24 hour clock e.g. midnight is 00:00 and 1pm is 13:00. Assumes valid input. PARAMETER: time_pst -- the time to convert, a string in the format HH:MM e.g. 01:24 or 14:00 RETURNS: The time in PST (the time in EST minus 3 hours) in the format HH:MM. Example: est_to_pst("07:34") returns "04:34" '''

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
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Write a python function matching the docstring below. You do not have to include the docstring in your solution. The function should convert a time (string) in Eastern Standard Time (EST) to Pacific Standard Time (PST).  PST is 3 hours behind EST. 

'''
FUNCTION -- est_to_pst
Takes a time in Eastern Standard Time (EST) and converts it to Pacific Standard Time (PST). All times use the 24 hour clock e.g. midnight is 00:00 and 1pm is 13:00. Assumes valid input.
PARAMETER:
time_pst -- the time to convert, a string in the format HH:MM e.g. 01:24 or 14:00
RETURNS:
The time in PST (the time in EST minus 3 hours) in the format HH:MM.
Example:
est_to_pst("07:34") returns "04:34"
'''
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