Pyspark alter column with substring

Question

Pyspark n00b... How do I replace a column with a substring of itself? I\'m trying to remove a select number of characters from the start and end of string.

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Answer 1

if the goal is to remove '_' from the column names then I would use list comprehension instead:

df.select(
    [ col(c).alias(c.replace('_', '') ) for c in df.columns ]
)