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DataLens: The Data Tool That Refused to pip install Anything

The Day We Had to Build a Neural Network Without NumPy Somewhere in the DataLens build, my teammate and I hit the wall every "zero-dependency" project eventually hits: the anomaly detector needed a…

  • DataLens built without any external packages, using only Python's standard library
  • Team hand-rolled matrix operations like multiplication, transpose, and activation functions
  • Leveraged Python's array module and sqlite3 for performance and SQL analytics

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