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  1. a=[1,2,3,2,1,4,1,5]
  2. print a
  3.  
  4. c={}
  5. for aa in a:
  6.   if not aa in c: c[aa]=1
  7.   else: c[aa]+=1
  8.  
  9. b=[i for i in a if c[i]>=2]
  10. print b
  11.  
Success #stdin #stdout 0.02s 9016KB
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Standard input is empty
stdout
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[1, 2, 3, 2, 1, 4, 1, 5]
[1, 2, 2, 1, 1]
https://ideone.com/Z1jcLj
language:
Python (cpython 2.7.16)
created:
8 years ago
visibility:
public

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