# 0111.py

print (bin(13))
# 0b1101

print (*map(bin,[15,6,88,14]))
# 0b1111 0b110 0b1011000 0b1110

print (*['%d = %s' %(x,bin(x)) for x in [15,6,88]], sep=', ')
# 15 = 0b1111, 6 = 0b110, 88 = 0b1011000

#######################################

print (int('1101',2))
# 13

print (0b1101)
# 13

print ('0b1101')
# 0b1101