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373 lines
13 KiB
Python
373 lines
13 KiB
Python
# Copyright (c) Microsoft Corporation.
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# Licensed under the MIT License.
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import re
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import logging
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import warnings
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import pandas as pd
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from pathlib import Path
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from pprint import pprint
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from ..contrib.evaluate import risk_analysis
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from ..contrib.backtest import backtest as normal_backtest
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from ..data.dataset import DatasetH
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from ..data.dataset.handler import DataHandlerLP
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from ..utils import init_instance_by_config, get_module_by_module_path
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from ..log import get_module_logger
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from ..utils import flatten_dict
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from ..utils.resam import parse_freq
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from ..strategy.base import BaseStrategy
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from ..contrib.eva.alpha import calc_ic, calc_long_short_return
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logger = get_module_logger("workflow", logging.INFO)
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class RecordTemp:
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"""
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This is the Records Template class that enables user to generate experiment results such as IC and
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backtest in a certain format.
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"""
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artifact_path = None
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@classmethod
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def get_path(cls, path=None):
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names = []
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if cls.artifact_path is not None:
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names.append(cls.artifact_path)
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if path is not None:
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names.append(path)
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return "/".join(names)
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def __init__(self, recorder):
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self._recorder = recorder
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@property
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def recorder(self):
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if self._recorder is None:
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raise ValueError("This RecordTemp did not set recorder yet.")
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return self._recorder
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def generate(self, **kwargs):
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"""
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Generate certain records such as IC, backtest etc., and save them.
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Parameters
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----------
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kwargs
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Return
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------
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"""
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raise NotImplementedError(f"Please implement the `generate` method.")
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def load(self, name):
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"""
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Load the stored records. Due to the fact that some problems occured when we tried to balancing a clean API
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with the Python's inheritance. This method has to be used in a rather ugly way, and we will try to fix them
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in the future::
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sar = SigAnaRecord(recorder)
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ic = sar.load(sar.get_path("ic.pkl"))
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Parameters
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----------
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name : str
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the name for the file to be load.
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Return
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------
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The stored records.
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"""
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# try to load the saved object
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obj = self.recorder.load_object(name)
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return obj
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def list(self):
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"""
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List the stored records.
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Return
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------
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A list of all the stored records.
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"""
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return []
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def check(self, parent=False):
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"""
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Check if the records is properly generated and saved.
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Raise
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------
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FileExistsError: whether the records are stored properly.
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"""
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artifacts = set(self.recorder.list_artifacts())
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if parent:
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# Downcasting have to be done here instead of using `super`
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flist = self.__class__.__base__.list(self) # pylint: disable=E1101
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else:
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flist = self.list()
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for item in flist:
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if item not in artifacts:
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raise FileExistsError(item)
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class SignalRecord(RecordTemp):
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"""
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This is the Signal Record class that generates the signal prediction. This class inherits the ``RecordTemp`` class.
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"""
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def __init__(self, model=None, dataset=None, recorder=None):
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super().__init__(recorder=recorder)
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self.model = model
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self.dataset = dataset
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def generate(self, **kwargs):
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# generate prediciton
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pred = self.model.predict(self.dataset)
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if isinstance(pred, pd.Series):
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pred = pred.to_frame("score")
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self.recorder.save_objects(**{"pred.pkl": pred})
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logger.info(
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f"Signal record 'pred.pkl' has been saved as the artifact of the Experiment {self.recorder.experiment_id}"
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)
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# print out results
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pprint(f"The following are prediction results of the {type(self.model).__name__} model.")
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pprint(pred.head(5))
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if isinstance(self.dataset, DatasetH):
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# NOTE:
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# Python doesn't provide the downcasting mechanism.
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# We use the trick here to downcast the class
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orig_cls = self.dataset.__class__
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self.dataset.__class__ = DatasetH
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params = dict(segments="test", col_set="label", data_key=DataHandlerLP.DK_R)
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try:
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# Assume the backend handler is DataHandlerLP
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raw_label = self.dataset.prepare(**params)
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except TypeError:
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# The argument number is not right
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del params["data_key"]
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# The backend handler should be DataHandler
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raw_label = self.dataset.prepare(**params)
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self.recorder.save_objects(**{"label.pkl": raw_label})
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self.dataset.__class__ = orig_cls
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def list(self):
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return ["pred.pkl", "label.pkl"]
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def load(self, name="pred.pkl"):
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return super().load(name)
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class HFSignalRecord(SignalRecord):
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"""
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This is the Signal Analysis Record class that generates the analysis results such as IC and IR. This class inherits the ``RecordTemp`` class.
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"""
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artifact_path = "hg_sig_analysis"
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def __init__(self, recorder, **kwargs):
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super().__init__(recorder=recorder)
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def generate(self):
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pred = self.load("pred.pkl")
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raw_label = self.load("label.pkl")
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long_pre, short_pre = calc_long_short_prec(pred.iloc[:, 0], raw_label.iloc[:, 0], is_alpha=True)
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ic, ric = calc_ic(pred.iloc[:, 0], raw_label.iloc[:, 0])
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metrics = {
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"IC": ic.mean(),
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"ICIR": ic.mean() / ic.std(),
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"Rank IC": ric.mean(),
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"Rank ICIR": ric.mean() / ric.std(),
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"Long precision": long_pre.mean(),
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"Short precision": short_pre.mean(),
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}
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objects = {"ic.pkl": ic, "ric.pkl": ric}
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objects.update({"long_pre.pkl": long_pre, "short_pre.pkl": short_pre})
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long_short_r, long_avg_r = calc_long_short_return(pred.iloc[:, 0], raw_label.iloc[:, 0])
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metrics.update(
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{
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"Long-Short Average Return": long_short_r.mean(),
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"Long-Short Average Sharpe": long_short_r.mean() / long_short_r.std(),
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}
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)
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objects.update(
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{
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"long_short_r.pkl": long_short_r,
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"long_avg_r.pkl": long_avg_r,
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}
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)
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self.recorder.log_metrics(**metrics)
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self.recorder.save_objects(**objects, artifact_path=self.get_path())
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pprint(metrics)
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def list(self):
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paths = [
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self.get_path("ic.pkl"),
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self.get_path("ric.pkl"),
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self.get_path("long_pre.pkl"),
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self.get_path("short_pre.pkl"),
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self.get_path("long_short_r.pkl"),
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self.get_path("long_avg_r.pkl"),
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]
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return paths
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class SigAnaRecord(SignalRecord):
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"""
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This is the Signal Analysis Record class that generates the analysis results such as IC and IR. This class inherits the ``RecordTemp`` class.
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"""
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artifact_path = "sig_analysis"
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def __init__(self, recorder, ana_long_short=False, ann_scaler=252, **kwargs):
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super().__init__(recorder=recorder, **kwargs)
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self.ana_long_short = ana_long_short
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self.ann_scaler = ann_scaler
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def generate(self, **kwargs):
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try:
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self.check(parent=True)
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except FileExistsError:
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super().generate()
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pred = self.load("pred.pkl")
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label = self.load("label.pkl")
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ic, ric = calc_ic(pred.iloc[:, 0], label.iloc[:, 0])
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metrics = {
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"IC": ic.mean(),
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"ICIR": ic.mean() / ic.std(),
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"Rank IC": ric.mean(),
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"Rank ICIR": ric.mean() / ric.std(),
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}
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objects = {"ic.pkl": ic, "ric.pkl": ric}
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if self.ana_long_short:
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long_short_r, long_avg_r = calc_long_short_return(pred.iloc[:, 0], label.iloc[:, 0])
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metrics.update(
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{
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"Long-Short Ann Return": long_short_r.mean() * self.ann_scaler,
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"Long-Short Ann Sharpe": long_short_r.mean() / long_short_r.std() * self.ann_scaler ** 0.5,
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"Long-Avg Ann Return": long_avg_r.mean() * self.ann_scaler,
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"Long-Avg Ann Sharpe": long_avg_r.mean() / long_avg_r.std() * self.ann_scaler ** 0.5,
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}
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)
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objects.update(
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{
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"long_short_r.pkl": long_short_r,
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"long_avg_r.pkl": long_avg_r,
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}
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)
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self.recorder.log_metrics(**metrics)
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self.recorder.save_objects(**objects, artifact_path=self.get_path())
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pprint(metrics)
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def list(self):
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paths = [self.get_path("ic.pkl"), self.get_path("ric.pkl")]
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if self.ana_long_short:
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paths.extend([self.get_path("long_short_r.pkl"), self.get_path("long_avg_r.pkl")])
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return paths
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class PortAnaRecord(RecordTemp):
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"""
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This is the Portfolio Analysis Record class that generates the analysis results such as those of backtest. This class inherits the ``RecordTemp`` class.
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The following files will be stored in recorder
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- report_normal.pkl & positions_normal.pkl:
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- The return report and detailed positions of the backtest, returned by `qlib/contrib/evaluate.py:backtest`
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- port_analysis.pkl : The risk analysis of your portfolio, returned by `qlib/contrib/evaluate.py:risk_analysis`
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"""
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artifact_path = "portfolio_analysis"
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def __init__(self, recorder, config, risk_analysis_freq, **kwargs):
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"""
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config["strategy"] : dict
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define the strategy class as well as the kwargs.
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config["executor"] : dict
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define the executor class as well as the kwargs.
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config["backtest"] : dict
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define the backtest kwargs.
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risk_analysis_freq : int
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risk analysis freq of report
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"""
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super().__init__(recorder=recorder, **kwargs)
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self.strategy_config = config["strategy"]
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self.executor_config = config["executor"]
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self.backtest_config = config["backtest"]
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_count, _freq = parse_freq(risk_analysis_freq)
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self.risk_analysis_freq = f"{_count}{_freq}"
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self.report_freq = self._get_report_freq(self.executor_config)
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def _get_report_freq(self, executor_config):
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ret_freq = []
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if executor_config["kwargs"].get("generate_report", False):
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_count, _freq = parse_freq(executor_config["kwargs"]["step_bar"])
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ret_freq.append(f"{_count}{_freq}")
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if "sub_env" in executor_config["kwargs"]:
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ret_freq.extend(self._get_report_freq(executor_config["kwargs"]["sub_env"]))
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return ret_freq
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def generate(self, **kwargs):
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# custom strategy and get backtest
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report_dict = normal_backtest(
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executor=self.executor_config, strategy=self.strategy_config, **self.backtest_config
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)
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for report_freq, (report_normal, positions_normal) in report_dict.items():
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self.recorder.save_objects(
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**{f"report_normal_{report_freq}.pkl": report_normal}, artifact_path=PortAnaRecord.get_path()
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)
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self.recorder.save_objects(
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**{f"positions_normal_{report_freq}.pkl": positions_normal}, artifact_path=PortAnaRecord.get_path()
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)
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if self.risk_analysis_freq not in report_dict:
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warnings.warn(
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f"the freq {self.risk_analysis_freq} report is not found, please set the corresponding env with `generate_report==True`"
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)
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else:
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report_normal, _ = report_dict.get(self.risk_analysis_freq)
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analysis = dict()
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analysis["excess_return_without_cost"] = risk_analysis(
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report_normal["return"] - report_normal["bench"], freq=self.risk_analysis_freq
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)
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analysis["excess_return_with_cost"] = risk_analysis(
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report_normal["return"] - report_normal["bench"] - report_normal["cost"], freq=self.risk_analysis_freq
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)
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analysis_df = pd.concat(analysis) # type: pd.DataFrame
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# log metrics
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self.recorder.log_metrics(**flatten_dict(analysis_df["risk"].unstack().T.to_dict()))
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# save results
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self.recorder.save_objects(
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**{f"port_analysis_{report_freq}.pkl": analysis_df}, artifact_path=PortAnaRecord.get_path()
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)
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logger.info(
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f"Portfolio analysis record 'port_analysis_{report_freq}.pkl' has been saved as the artifact of the Experiment {self.recorder.experiment_id}"
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)
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# print out results
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pprint("The following are analysis results of the excess return without cost.")
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pprint(analysis["excess_return_without_cost"])
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pprint("The following are analysis results of the excess return with cost.")
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pprint(analysis["excess_return_with_cost"])
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def list(self):
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list_path = []
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for _freq in self.report_freq:
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list_path.extend(
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[
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PortAnaRecord.get_path(f"report_normal_{_freq}.pkl"),
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PortAnaRecord.get_path(f"positions_normal_{_freq}.pkl"),
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]
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)
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if _freq == self.risk_analysis_freq:
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list_path.append(PortAnaRecord.get_path(f"port_analysis_{_freq}.pkl"))
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return list_path
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