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Return error messages for slopeIntercept method

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lolabird 2024-02-16 10:29:31 -07:00
commit 42c23059c4
1 changed files with 8 additions and 0 deletions
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8
thinkcspy/Chapter-17-Exercises/points.py
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@ -32,6 +32,14 @@ class Point:
def slopeIntercept(self, pnt): def slopeIntercept(self, pnt):
dx = self.x - pnt.getX() dx = self.x - pnt.getX()
dy = self.y - pnt.getY() dy = self.y - pnt.getY()
# Accounting for points of failure (divide by 0)
if dx == 0:
if dy == 0:
return "Cannot calculate slope of a single point."
else:
return "Cannot calculate slope of a vertical line."
m = dy / dx m = dy / dx
b = self.y - m*self.x b = self.y - m*self.x