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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def shiftLeft(col, numBits):
 """Shift the given value numBits left. [Row(r=42)] """

    sc = SparkContext._active_spark_context
    return Column(sc._jvm.functions.shiftLeft(_to_java_column(col), numBits))