Itempath

gistfile1.py

def itempath(pth, obj):
    """Evaluate a dotted 'item path' on object"""
    parts = pth.split('.', 1)
    try:
        parts[0] = int(parts[0])
    except ValueError:
        pass

    if len(parts) == 1:
        return obj[parts[0]]

    item, remaining = parts
    obj = obj[item]
    return itempath(remaining, obj)