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Closing as invalid.  Octal and hex notations apply only to 
integer literals (see the reference manual).  0x12e4 is an 
integer hex literal ('e' is a hex digit!  so are a, b, c, d, and f), 
and 4836 is its correct decimal equivalent.  017e4 is a 
decimal float literal, denoting the same value as 17e4 (i.e., 
the presence or absence of leading zeroes has no effect on 
the meaning of decimal float literals -- and all float literals in 
Python are decimal float literals).