import math
s1 = f'{math.pi =    :.2f}'
s2 = f'{f"{3.1415=:.1f}":*^20}'
s3 = f'{0 == 1}'
x = 'A string'
s4 = f'{x=!s}'
x = 2.71828
s5 = f'{x=:.2f}'
s6 = f'{x=:}'
s7 = f'{x=!r:^20}'
s8 = f'{x=!s:^20}'
s9 = f'{x=    !a:^20}'
s10 = f'{3 * x + 15=}'
pi = 'π'
s11 = f'alpha α {pi   =    } ω omega'
s12 = f'''{
    3
    =}'''
s13 = f'{"="}'