For center methods, always put any extra pad character at the end of the result #137331
Description
Bug report
Bug description:
With str.center(), bytes.center() and bytearray.center(), ? is added to the right or left side of a string or byte string inconsistently, depending on the length of the original string or byte string as shown below so ? should be added to the left side of a string or byte string consistently not depending on the length of the original string or byte string because it's consistent and English is read from the left to the right:
print('a'.center(2, '?')) # a?
print('ab'.center(3, '?')) # ?ab
print('abc'.center(4, '?')) # abc?
print('abcd'.center(5, '?')) # ?abcd
print('abcde'.center(6, '?')) # abcde?
print(b'a'.center(2, b'?')) # b'a?'
print(b'ab'.center(3, b'?')) # b'?ab'
print(b'abc'.center(4, b'?')) # b'abc?'
print(b'abcd'.center(5, b'?')) # b'?abcd'
print(b'abcde'.center(6, b'?')) # b'abcde?'
print(bytearray(b'a').center(2, bytearray(b'?'))) # bytearray(b'a?')
print(bytearray(b'ab').center(3, bytearray(b'?'))) # bytearray(b'?ab')
print(bytearray(b'abc').center(4, bytearray(b'?'))) # bytearray(b'abc?')
print(bytearray(b'abcd').center(5, bytearray(b'?'))) # bytearray(b'?abcd')
print(bytearray(b'abcde').center(6, bytearray(b'?'))) # bytearray(b'abcde?')In addition, with f-strings, str.format() and str.format_map(), ? is added to the right side of a string consistently not depending on the length of the original string as shown below but ? is added to the right side of a string but not the left side of a string so ? should be added to the left side of a string because English is read from the left to the right again:
print(f'{'a':?^2}') # a?
print(f'{'ab':?^3}') # ab?
print(f'{'abc':?^4}') # abc?
print(f'{'abcd':?^5}') # abcd?
print(f'{'abcde':?^6}') # abcde?
print('{:?^2}'.format('a')) # a?
print('{:?^3}'.format('ab')) # ab?
print('{:?^4}'.format('abc')) # abc?
print('{:?^5}'.format('abcd')) # abcd?
print('{:?^6}'.format('abcde')) # abcde?
print('{a:?^2}'.format_map({'a':'a'})) # a?
print('{ab:?^3}'.format_map({'ab':'ab'})) # ab?
print('{abc:?^4}'.format_map({'abc':'abc'})) # abc?
print('{abcd:?^5}'.format_map({'abcd':'abcd'})) # abcd?
print('{abcde:?^6}'.format_map({'abcde':'abcde'})) # abcde?CPython versions tested on:
3.12
Operating systems tested on:
Windows