[Web development with Python] Measures against garbled characters when outputting html

import io
import os
import sys

html_body = 'HTML format'

if type(sys.stdout) == io.TextIOWrapper:
    sys.stdout = io.TextIOWrapper(
        sys.stdout.buffer, 
        encoding='utf-8'
print ('Content-type: text/html; charset=UTF-8\r\n')
print (html_body)

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