Tuples from List

[Robert Kern]

rshepard at nospam.appl-ecosys.com wrote:
>   While it should be easy for me to get what I need from a list, it's
> proving to be more difficult than I expected.
> 
>   I start with this list:
> 
> [  6.24249034e-01+0.j   5.11335982e-01+0.j   3.67333773e-01+0.j
>    3.01189122e-01+0.j   2.43449050e-01+0.j   1.82948476e-01+0.j
>    1.43655139e-01+0.j   9.91225725e-02+0.j]

No, that's a numpy array.

> and I want a list of floats of only the first 6 digits for each value. If I
> write:
> 	for i in listname:
> 	    print i
> 
> I get this:
> 
> (0.624249034424+0j)
> (0.511335982206+0j)
> (0.367333773283+0j)
> (0.301189121704+0j)
> (0.243449050439+0j)
> (0.182948475822+0j)
> (0.14365513894+0j)
> (0.0991225725344+0j)

Those aren't tuples, but complex numbers.

>   I know it's embarrassingly simple, but the correct syntax eludes my
> inexperienced mind. What I want is a list [0.62424, 0.51133, ...] so that I
> can normalize those values.
> 
>   What is the correct syntax, please?

# Extract the real components (since the imaginary components are all 0):
eigvals = eigvals.real

# Normalize the eigenvalues:
eigvals /= eigvals.sum()

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco