Got Spark working locally

Scripts/bronze_to_silver.py

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+import os
+from pyspark.sql import SparkSession
+from dotenv import load_dotenv
+
+load_dotenv()
+
+# ---- WINDOWS FIX ----
+os.environ.setdefault("HADOOP_HOME", "C:\\hadoop")
+os.environ.setdefault("hadoop.home.dir", "C:\\hadoop")
+os.environ["PATH"] += ";C:\\hadoop\\bin"
+
+
+spark = (
+    SparkSession.builder
+    .appName("bronze-to-silver-batch")
+
+    # ---- ALL JARS IN ONE PLACE ----
+    .config(
+        "spark.jars.packages",
+        ",".join([
+            # Delta
+            "io.delta:delta-core_2.12:2.3.0",
+
+            # S3A
+            "org.apache.hadoop:hadoop-aws:3.3.4",
+            "com.amazonaws:aws-java-sdk-bundle:1.12.262"
+        ])
+    )
+
+    # ---- DELTA ----
+    .config("spark.sql.extensions", "io.delta.sql.DeltaSparkSessionExtension")
+    .config("spark.sql.catalog.spark_catalog", "org.apache.spark.sql.delta.catalog.DeltaCatalog")
+
+    # ---- S3 ----
+    .config("spark.hadoop.fs.s3a.endpoint", os.getenv("STORAGE_ENDPOINT"))
+    .config("spark.hadoop.fs.s3a.access.key", os.getenv("STORAGE_ACCESS_KEY"))
+    .config("spark.hadoop.fs.s3a.secret.key", os.getenv("STORAGE_SECRET_KEY"))
+    .config("spark.hadoop.fs.s3a.path.style.access", "true")
+    .config("spark.hadoop.fs.s3a.impl", "org.apache.hadoop.fs.s3a.S3AFileSystem")
+
+    .getOrCreate()
+    
+)
+    
+print("Spark created OK")
+
+
+# Prove S3A filesystem class is on the classpath
+print("fs.s3a.impl =", spark.sparkContext._jsc.hadoopConfiguration().get("fs.s3a.impl"))
+
+# Force a real read/action from S3
+df = spark.read.json("s3a://camdoesdata/bronze/transactions_raw/")
+print("About to show() ...")
+df.limit(5).show(truncate=False)
+
+print("Done.")
+spark.stop()
+