Why it matters

Pandas API bridges pandas users to Spark. Understanding shapes migration.

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The architecture

Same API as pandas.

Backed by Spark DataFrame.

Pandas API on SparkPandas API syntaxfamiliarSpark backenddistributedFallbackwhen unsupportedNot full pandas API; unsupported ops fall back to pandas (local, slow)
API compatibility.
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How it works end to end

Not full compatibility: some pandas features missing.

Fallback: to_pandas() moves data to driver.

Performance: mostly matches Spark DataFrame.

Import: import pyspark.pandas as ps.