`final` objects cannot be reassigned. This is the most import concept about `final`s. Unlike a `property` object, this will

This stops the `final` attributes from being reassigned on the class object.

This method was deprecated in Python 2.0. It predates slice objects, but Python 2.7.11 still uses it if you implement it, which ndarr

Unicode representation for this object.

r""" Return the active contract based on the previous trading day's volume. In the rare case that a double volume switch occurs we tr

Override the default array allocation to produce a LabelArray when we have a string-like dtype.

Return uniformly-distributed True/False values.

helper for ``_group_ranges``

Subclasses should implement this to perform actual computation. This is named ``_compute`` rather than just ``compute`` because

Compute our stored expression string with numexpr.

Call the user's `compute` function on each window with a pre-built output array.

Compute by delegating to self._wrapped_term._compute on sample dates. On non-sample dates, forward-fill from previously-computed sam

For each row in the input, compute a like-shaped array of per-row ranks.

Compute our result with numexpr, then re-apply `mask`.

For each row in the input, compute a mask of all values falling between the given percentiles.

Return uniformly-distributed dates in 2014.

Downgrade assets db by removing the 'tick_size' column and renaming the 'multiplier' column.

Downgrade assets db by removing the 'auto_close_date' column.

Downgrade assets db by adding a not null constraint on ``equities.first_traded``

Downgrades assets db by copying the `exchange_full` column to `exchange`, then dropping the `exchange_full` column.