Reading hex to double-precision float python -

i trying unpack hex string double in python.

when try unpack following:

unpack('d', "4081637ef7d0424a");

i following error:

struct.error: unpack requires string argument of length 8

this doesn't make sense me because double 8 bytes long, and

2 character = 1 hex value = 1 byte

so in essence, double of 8 bytes long 16 character hex string.

any pointers of unpacking hex double super appreciated.

you need convert hex digits binary string first:

struct.unpack('d', "4081637ef7d0424a".decode("hex"))

struct.unpack('d', binascii.unhexlify("4081637ef7d0424a"))

the latter version works in both python 2 , 3, former in python 2

Image