擅长:python、mysql、java
<p><code>sum = round(sum, 3))</code></p>
<p>将float限制为3个小数点,然后执行算术</p>
<pre><code>def mult(pixel : int, multiplier : tuple) -> float:
"multiplies either r,g,b pixel by row vector (0.257, 0.504, 0.098),(-0.148,-0.291,0.439),(0.439,-0.368,-0.071))"
sum=0
for mul in multiplier:
sum += (pixel * mul)
sum = round(sum, 3)
print(sum)
return sum
</code></pre>