Suppress double-spaced output in Python 3 by specifying `lineterminator="\n"` to csv.writer instance.

csv.writer_Usage.py

"""
Suppress  double-spaced output in Python 3 by specifying `lineterminator="\n"` 
to csv.writer instance.
"""
import csv

fsrc_pth = "src_pth"
fdst_pth = "dst_pth"

with open(fdst_pth, 'w') as f1:
    fdst = csv.writer(f1, lineterminator="\n")

with open(fsrc_pth, 'r') as f2:
    fsrc = csv.reader(f2)
    for rec in fsrc: fdst.writerow(rec)

        
assert f1.closed
assert f2.closed

print("Finished")