compressed file IO in python

compress.py

df = '~/path/to/some/text/file.csv'
df1 = 'path/to/some/text/file.gz'        

import zlib
import gzip

with open(df, 'r', encoding='utf-8') as fh:
  tx = fh.read()
	
# compress a text file
with gzip.open(df1, 'wt') as fh:
  fh.write(tx)

# read a compressed text file line-by-line
with gzip.open(df1, 'rt') as fh:
  tx = (line.strip().split(',') for line in fh.readlines())