How to save result of printSchema to a file in PySpark

You need treeString (which for some reason, I couldn't find in the python API)

#v will be a string
v = df._jdf.schema().treeString()

You can convert it to a RDD and use saveAsTextFile

sc.parallelize([v]).saveAsTextFile(...)

Or use Python specific API to write a String to a file.