gistfile1.py

def reopen_stdio_with_encoding(encoding='utf-8'):
    import io
    import sys
    def reopen(file):
        file.__init__(file.detach(),
                      line_buffering=file.line_buffering,
                      encoding=encoding)
    reopen(sys.stdout)
    reopen(sys.stderr)
    reopen(sys.stdin)

reopen_stdio_with_encoding()
print("ほげほげ")

re-init rather than opening other TextIOWrapper.