Assert that ``subcls`` is a subclass of ``cls``. Parameters ---------- subcls : type The type to check. cls : type Th

Assertion helper for comparing very long strings (e.g. error messages).

Compute the expected return dtype for the given binary operator. Parameters ---------- op : str Operator symbol, (e.g. '+',

Wrap a function in a processor that calls `f` on the argument before passing it along. Useful for creating simple arguments to the `@pre

Downgrades the assets db at the given engine to the desired version. Parameters ---------- engine : Engine An SQLAlchemy engine t

Ensure that a directory named "path" exists.

Look up a column by name. Parameters ---------- name : str Name of the column to look up. Returns

Parameters ---------- root_symbol : str The root symbol for the contract chain. dt : Timestamp

Helper for building a WarningContext that ignores warnings from numpy's nanfunctions.

Is the asset restricted (RestrictionStates.FROZEN) on the given dt? Parameters ---------- asset : Asset of iterable

Convert an object into an Asset or sequence of Assets. This method exists primarily as a convenience for implementing user-f

For a given asset/date/column combination, we generate a corresponding raw value using the following formula for OHLCV columns: data(as

Get the name of the Python magic method corresponding to `op`. Parameters ---------- op : str {'+','-','*', '/','**','&','|','^','<'

Find values in ``dts`` closest but not equal to ``dt``. Returns a pair of (last_before, first_after). When ``dt`` is less than any elem

Compute the number of decimal places in a number. Examples -------- >>> number_of_decimal_places(1) 0 >>> number_of_decimal_

Extract all of the fields from the portfolio as a new dictionary.

Register a new TradingControl to be checked prior to order calls.

Remove a column. Parameters ---------- name : str The name of the column to remove. Raises -----

Compute values for ``pipeline`` from ``start_date`` to ``end_date``, in date chunks of size ``chunksize``. Chunked execution

Compute values for ``pipeline`` from ``start_date`` to ``end_date``. Parameters ---------- pipeline : zipline.pipeli

This is a utility method that asserts expected results for conversion of orders to transactions given a trade history

Construct an EquityPricingLoader without support for fx rates. The returned loader will raise an error if requested to load

Inserts the version value in to the version table. Parameters ---------- conn : sa.Connection The connection to use to execu

Create a deprecated ``__getitem__`` method that tells users to use getattr instead. Parameters ---------- name : str The name

Ensure that a ctable exists for ``sid``, then return it.

Internal method that returns the position of the given minute in the list of every trading minute since market open of the first trad

Get all trading sessions for the calendar of this domain. This determines the row labels of Pipeline outputs for pipelines run on

Alter columns from a table. Parameters ---------- name : str The name of the table. *columns The new columns to have.

Bind a Blaze expression to resources. Parameters ---------- expr : bz.Expr The expression to which we want to bind resources

Construct a Filter matching the bottom N asset values of self each day. If ``groupby`` is supplied, returns a Filter matching the bo

Check that a list of Index objects are all equal. Parameters ---------- indexes : iterable[pd.Index] Iterable of indexes to check

Compose multiple classes together. Parameters ---------- *mcls : tuple[type] The classes that you would like to compose Retu

Compute the start and end dates to run a pipeline for. Parameters ---------- sessions : DatetimeIndex The available dates. st

Build a mask using np.eye.

Returns the current simulation datetime. Parameters ---------- tz : tzinfo or str, optional The timezone

Override this method to add new logic to the construction of the generator. Overrides can use the _create_generator method to

Generic is_missing function that handles NaN and NaT.

Load data from our stored baseline.

Make futures testing data that simulates the notice/expiration date behavior of physical commodities like oil. Parameters ----------

Map a function from str -> bool element-wise over ``self``. ``f`` will be applied exactly once to each non-missing unique value in

Like ~isnan, but checks for locations where we store missing values.

Fill sid container with empty data through the specified date. If the last recorded trade is not at the close, then that day will be

Construct a Filter matching values of self that fall within the range defined by ``min_percentile`` and ``max_percentile``.

Called with an result of ``self``, unravelled (i.e. 1-dimensional) after any user-defined screens have been applied. This is

Removes all given orders from the blotter's open_orders list. Parameters ---------- closed_orders: iterable of order

Repr a value and html-escape the result. If an error is thrown by the repr, show a placeholder.

Creates a dictionary representing the state of the risk report. Parameters ---------- start_session : pd.Timestamp

Adds a new key value pair to the cache. Parameters ---------- key : any The key to use for the pair. valu

Get the cached value. Returns ------- value : object The cached value. Raises ------

Make an extension for an AdjustedArrayWindow specialization.

Get a path relative to the zipline root. Parameters ---------- paths : list[str] List of requested path pieces. environ