issue writing a csv record in pydroid 3

Question

Error writing CSV record in Pydroid 3 on Samsung s9+.

Copied code from book, but runtime errors in Pydroid 3.

Here is code:

import csv
file = open("stars.csv", "w")
newrecord = "brian,73,taurus\n"
file.write(str(newrecord))
file.close()

output attached.

Advice appreciated.