index(x[, start[, stop]]) 
Return the position of x in the deque (at or after index start and before index stop). Returns the first match or raises ValueError if not found.
New in version 3.5.
index(x[, start[, stop]]) 
Return the position of x in the deque (at or after index start and before index stop). Returns the first match or raises ValueError if not found.
New in version 3.5.
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