Attempting this solution, I get the following assertion error:

$---------------------------------------------------------------------------$

AssertionError Traceback $($most recent call last$)$

in

$34$ # TODO: Redefine the three lists using the select$\_$all$\_$items function

$35$ # your code here

$--->36$ upto$\_1\_$year $=$ select$\_$all$\_$items$\_$in$\_$freq$\_$range$(0,1/52)$

$37$ one$\_$year$\_$to$\_1\_$quarter $=$ select$\_$all$\_$items$\_$in$\_$freq$\_$range$(1/52,1/13)$

$38$ less$\_$than$\_1\_$quarter $=$ select$\_$all$\_$items$\_$in$\_$freq$\_$range$(1/13,$ float$(\text{'}$inf$\text{'}))$

in select$\_$all$\_$items$\_$in$\_$freq$\_$range$($lo$,$ hi$)$

$25$ new$\_$fft$\_$data.append$(0\mathrm{.}0)$

$26$ filtered$\_$data $=$ ifft$($new$\_$fft$\_$data$)$

$--->27$ assert all$($ abs$($imag$($x$))<=1$E$-10$ for x in filtered$\_$data$)$

$28$ return $[$real$($x$)$ for x in filtered$\_$data$]$

$29$

AssertionError:

I also get the following assertion error on the plotting portion:

$---------------------------------------------------------------------------$

AssertionError Traceback $($most recent call last$)$

in

$27$ N $=$ len$($weekly$\_$prices$)$

$28$ assert$($len$($fft$\_$frequencies$)==$ len$($weekly$\_$prices$))$

$--->29$ assert$($fft$\_$frequencies$[0]==0\mathrm{.}0)$

$30$ assert$($abs$($fft$\_$frequencies$[$N$//2]-0\mathrm{.}5)<=0\mathrm{.}05),$ f$\text{'}$fft frequncies incorrect: $\{$fft$\_$frequencies$[$N$//2]\}$ does not equal $0\mathrm{.}5\text{'}$

$31$ assert$($abs$($fft$\_$frequencies$[$N$//4]-0\mathrm{.}25)<=0\mathrm{.}05),$ f$\text{'}$fft frequncies incorrect: $\{$fft$\_$frequencies$[$N$//4]\}$ does not equal $0\mathrm{.}25\text{'}$

AssertionError: