擅长:python、mysql、java
<pre><code>def SD(numLists):
def singleSD(numList):
cntN=len(numList)
sumN=0
for i in numList:
sumN+=i
avgVal=float(sumN)/float(cntN)
sumVar=0.0
for i in range(cntN):
sumVar+=float((numList[i]-avgVal)**2)
return ((float(sumVar)/float((cntN-1)))**0.5)
return [singleSD(l) for l in numLists]
</code></pre>