Nick Omeyer nomeyer

## tree.md

      
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                nomeyer
                / tree.md
            
            
              Created
              May 19, 2016 16:14
                — forked from hrldcpr/tree.md
            
              
                one-line tree in python
              
          
    One-line Tree in Python

Using Python's built-in defaultdict we can easily define a tree data structure:
def tree(): return defaultdict(tree)
That's it!

  
## get_all_positions.py
L = [1, 2, 3, 1]
[i for i, x in enumerate(L) if x == value]