https://pythonmaniac.com/file-rw-newline-code/#index_id3
import base64
with open('test2.txt', 'w', encoding='utf-8', newline='') as f:
f.write('テストファイルです1\r\n')
f.write('テストファイルです2\r\n')
with open('test2.txt', "r", encoding='utf-8', newline='') as f:
print( f.read() )
with open('test2.txt', "r", encoding='utf-8', newline='') as f1:
data = base64.b64encode( f1.read().encode('utf-8') )
print( data.decode('utf-8') )
with open('buf.txt', 'w', encoding='utf-8', newline='') as f2:
f2.write( data.decode('utf-8') )
print( base64.b64decode(data).decode('utf-8') )
with open('test3.txt', 'w', encoding='utf-8', newline='') as f3:
f3.write( base64.b64decode(data).decode('utf-8'))
