reverse list (3-12-2024)
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lst=[1,2,3,4,5,6,7,8] #neg. seq: [-8,-7,-6,-5,-4,-3,-2,-1]
l1=lst[1:-10:-1]# [start:end-(-1)=+1:step]
print(l1)
#[i:j:+value] if i,j >len(lst) i,j = len(lst)
#i is missing i=0; if j is missing, j = len(lst)
#if i, j<0; i,j =max(0, len(lst)+i, j)
#[i:j:-ve]
#if i,j>len(lst)=len(lst)-1
#if i,j<0=max(-1, len(lst)+i,j)=0
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