🎮Core

Command (Abstract Base Class)

• Description: The Command class is an abstract base class (ABC) that defines the interface for all commands in the DSL.

• Constructor Parameters: None

• Methods:

  • execute(self, data_provider): An abstract method that must be implemented by any subclass. This method will act on the command using the provided data_provider.

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Open_Command

Retrieves the opening price of a market instrument for a specified date.

• Constructor Parameters:

  • date (str): The date for which the open price is to be fetched.

• Methods:

  • execute(self, data_provider): Calls data_provider.get_open(self.date) to retrieve the opening price for the specified date.

Example Usage:

open_command = OpenCommand(date="2023-09-02")
open_price = open_command.execute(data_provider)

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High_Command

Retrieves the highest price of a market instrument for a specified date.

• Constructor Parameters:

  • date (str): The date for which the high price is to be fetched.

• Methods:

  • execute(self, data_provider): Calls data_provider.get_high(self.date) to retrieve the highest price for the specified date.

Example Usage:

high_command = HighCommand(date="2023-09-02")
high_price = high_command.execute(data_provider)

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Low_Command

Retrieves the lowest price of a market instrument for a specified date.

• Constructor Parameters:

  • date (str): The date for which the low price is to be fetched.

• Methods:

  • execute(self, data_provider): Calls data_provider.get_low(self.date) to retrieve the lowest price for the specified date.

Example Usage:

low_command = LowCommand(date="2023-09-02")
low_price = low_command.execute(data_provider)

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Close_Command

Retrieves the closing price of a market instrument for a specified date.

• Constructor Parameters:

  • date (str): The date for which the close price is to be fetched.

• Methods:

  • execute(self, data_provider): Calls data_provider.get_close(self.date) to retrieve the closing price for the specified date.

Example Usage:

close_command = CloseCommand(date="2023-09-02")
close_price = close_command.execute(data_provider)