#Difference Between str() and repr()? #The goal of __repr__ is to be unambiguous. #The goal of __str__ is to be readable. #__repr__ #1. is used for logging, debugging. #2. meant to be used by developers. #__str__ #1. is meant to used as a display to the end user.

a= [1,2,3,4]
b= 'sample string' 

#Both will give the same output
print(str(a))
print(repr(a))

[1, 2, 3, 4]
[1, 2, 3, 4]

print(str(b))
print(repr(b))

sample string
'sample string'

import datetime
import pytz
a=datetime.datetime(2015, 6, 11, 4, 35, 48, 528521, tzinfo=pytz.UTC)
b='2015-06-11 04:35:48.528521+00:00'

#on surface both variables a and b looks same.
print(str(a))
print(str(b))
#The goal of __str__ is to be readable.

2015-06-11 04:35:48.528521+00:00
2015-06-11 04:35:48.528521+00:00

#whenever we ran repr(a) we are able to get it's a datetime.
print(repr(a))
print(repr(b))
#The goal of __repr__ is to be unambiguous.

datetime.datetime(2015, 6, 11, 4, 35, 48, 528521, tzinfo=<UTC>)
'2015-06-11 04:35:48.528521+00:00'

a= datetime.datetime.utcnow().replace(tzinfo=pytz.UTC)
b=str(a)

#Another example
print('str(a): {}'.format(str(a)))
print('str(b): {}'.format(str(b)))
print()
print('repr(a): {}'.format(repr(a)))
print('repr(b): {}'.format(repr(b)))

str(a): 2019-07-15 14:35:28.366148+00:00
str(b): 2019-07-15 14:35:28.366148+00:00

repr(a): datetime.datetime(2019, 7, 15, 14, 35, 28, 366148, tzinfo=<UTC>)
repr(b): '2019-07-15 14:35:28.366148+00:00'