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Enhanced TvDatafeed library for asynchronous operations and flexible data output #61

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koushikghosh11
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Implemented significant updates to the TvDatafeed library, focusing on improving its performance and usability:

  • Migrated to websockets from websocket for efficient asynchronous operations.
  • Introduced asynchronous methods for fetching multiple symbol's historical data simultaneously, improving speed and scalability.
  • Enabled flexible data output, allowing users to choose between raw lists and pandas DataFrames.
  • Refactored core functionalities for better maintainability and extensibility.
  • Modified usage guide in Readme
  • Modified requirments.txt

These changes maintain backward compatibility while offering modernized functionality for TradingView data retrieval.
Looking forward to your feedback!

@NumairSayed
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Thank you for the contribution @koushikghosh11, Did this patch have any changes in execution time? Also, can you suggest how can we make it real time? through persistent connections maybe. I am new to this and looking forward to your suggestion.

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