assign variable in while statement python

Question

Hi i'm trying to get a set of points from matplotlib.pyplot.ginput. my idea is to save points in a list while the actuaPoint!=lastPoint

is there a way to do it something like:

lastPoint = None
pointList = []

actualPoint = plt.ginput(1)
while (actualPoint=plt.input()) != lastPoint:
    pointList.append(actualPoint)
    lastPoint= actualPoint

? resuming i'm trying to know if there's a way to do the variable assignment inside the while statement

Answer 1

You need to use an assignment expression , using the := operator.

point, = pointList = [plt.ginput(1)]
while (next_point := plt.input()) != point:
    pointList.append(next_point)
    point = next_point