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I would like to add a new column to a dataframe based on another column using WHEN. I have the folowing code:

from pyspark.sql.functions import col, expr, when
df2=df.withColumn("test1",when(col("Country")=="DE","EUR").when(col("Country")=="PL","PLN").otherweise("Unknown"))

but I get the error: 'Column' object is not callable How can I fix the problem?

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1 Answer 1

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You have a typo in your statement.

  • otherweise change to otherwise
df=spark.createDataFrame([("DE",),("PL",),("PO",)],["Country"])
df.withColumn("test1",when(col("country") == "DE", "EUR").when(col("country") == "PL", "PLN").otherwise("Unknown")).show()
#+-------+-------+
#|Country|  test1|
#+-------+-------+
#|     DE|    EUR|
#|     PL|    PLN|
#|     PO|Unknown|
#+-------+-------+
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