# Error in listing a Zip

Until the end of this code all is fine

```
billes=[ZZ.random_element(0, 4) for i in range(50)]
billes+=[ZZ.random_element(5, 10) for i in range(80)]
billes+=[ZZ.random_element(10, 25) for i in range(21)]
billes+=[ZZ.random_element(25, 50) for i in range(28)]
billes+=[ZZ.random_element(50, 100) for i in range(28)]
shuffle(billes)#no necessary here only to confirm
billes1=sorted(billes)
binbilles1=[[x for x in billes1 if 0 <= x < 4],[x for x in billes1 if 5 <= x < 10],[x for x in billes1 if 10 <= x < 25],[x for x in
billes1 if 25 <= x < 50],[x for x in billes1 if 50 <= x < 100]]
avbinbilles1=[len(x)^(-1)*sum(x) for x in binbilles1]
number=[len(x) for x in binbilles1]
cumsumpop=[sum(number[:i]) for i in range(1, len(number)+1)]
percumsumpop=[0]+[sum(number[:i])/sum(number) for i in range(1, len(number)+1)]
cumsumavbinbilles1=[sum(avbinbilles1[:i]) for i in range(1, len(avbinbilles1)+1)]
percumsumavbinbilles1=[0]+[sum(avbinbilles1[:i])/sum(avbinbilles1) for i in range(1, len(avbinbilles1)+1)]
#percumbilles1=[0]+[sum(binbilles1[:i])/sum(number) for i in range(1, len(binbilles1)+1)]
bool(len(percumsumavbinbilles1)==len(percumsumpop))
```

To plot a Lorenz curve I add

```
A=list(zip(percumsumavbinbilles1,percumsumpop))
```

as show by `If you meant to plot two lists 'x' and 'y' against each other, use 'list_plot(list(zip(x,y)))'`

in `https://doc.sagemath.org/html/en/reference/plotting/sage/plot/plot.html`

But this generate an error `'list' object is not callable`

. Could somebody explain my mistake?

`A = list(zip(...))`

worked for me, returning`[(0, 0), (0.00968342644320298, 0.24154589371980675), (0.0633147113594041, 0.6280193236714976), (0.1931364724660814, 0.7294685990338164), (0.4530460228784251, 0.8647342995169082), (1.0, 1.0)]`

.WorksForMe(TM) in 10.0.beta4 (up to a formatting error in your code when pasted in my console : in Python/Sage, blank space is syntactic !)

BTW, this can be done much more easily in R ... which is quite easily callable from Sage.

My version is 9.7. But I encounter the same problem with 9.3. And sorry for the blank space. It was only a typesetting error not present in my original code. But I have tried this simple following code

which works in both versions.Then after this it works for my first exemple. I do not understand. Sorry

Did you perhaps use

`list`

as a variable name? For example if you first did`list = [1,2,3]`

and then later did`list(zip(A,B))`

, you would get the error you described.