How Can I Convert A Tuple To A Float In Python?

Say I created a tuple like this using a byte array: import struct a = struct.unpack('f', 'helo') How can I now convert a into a float? Any ideas?

Solution 1:

struct.unpack always returns a tuple, because you can unpack multiple values, not just one.

A tuple is a sequence, just like a list, or any other kind of sequence. So, you can index it:

>>>a = struct.unpack('f', 'helo')>>>b = a[0]>>>b
7.316105495173273e+28

… or use assignment unpacking:

>>>b, = a>>>b
7.316105495173273e+28

… or loop over it:

>>>for b in a:...print(b)
7.316105495173273e+28

And of course you can combine any of those into a single line:

>>>b = struct.unpack('f', 'helo')[0]>>>b, = struct.unpack('f', 'helo')>>>c = [b*b for b in struct.unpack('f', 'helo')]

If this isn't obvious to you, you should read Lists, More on Lists, and Tuples and Sequences in the tutorial.

Solution 2:

You probably could do this:

a = a[0]