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Python error when using unicode in email subject

python
#1

I am trying to use unicode in an email subject with Python.
Code is:

    pub_unicode = u"\U0001f37a"									
	money_unicode = u"\U0001f4b0"
	unicode_b64_utf = base64.b64encode(bytes(u'\U0001f37a PubBotC4.1 \U0001f4b0', "utf-8"))
	unicode_b64_utf_decoded = base64.b64decode(unicode_b64_utf).decode("utf-8", "ignore")                    
	print("base64 encoded to utf-8 and then base64 decoded", unicode_b64_utf_decoded)   		
	print ("unicode symbols", pub_unicode, money_unicode)		
	print ("ascii format",  ascii(pub_unicode), ascii(money_unicode))		
	version = " PubBotC4.1 " 									
	#version = unicode_b64_utf_decoded							# bot crash
    email_address = "user@gmail.com"
    email_msg = "test"
    blynk.email(email_address, version,  email_msg) 

Script prints out the following:

base64 b'ZGF0YSB0byBiZSBlbmNvZGVk'
base64 encoded to utf-8 and then base64 decoded 🍺 PubBotC4.1 💰
unicode symbols 🍺 💰
ascii format '\U0001f37a' '\U0001f4b0'

But if I change from version = " PubBotC4.1 " to version = unicode_b64_utf_decoded the script crashes with the following error:

	File "PubBot4.1app.py", line 816, in blynk_connected
    blynk.email(email_address, version,  email_msg)
	File "/usr/local/lib/python3.6/dist-packages/BlynkLib.py", line 264, in email
    self._send(self._format_msg(MSG_EMAIL, to, subject, body))
	File "/usr/local/lib/python3.6/dist-packages/BlynkLib.py", line 151, in _format_msg
    data = ('\0'.join(map(str, args))).encode('ascii')
	UnicodeEncodeError: 'ascii' codec can't encode character '\U0001f37a' in position 32: ordinal not in range(128)

Has anyone managed to use unicode in email messages with Python?

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#2

OK I found the hack.

Line 151 in BlynkLib.py can be changed as follows:

        #data = ('\0'.join(map(str, args))).encode('ascii')
        data = ('\0'.join(map(str, args))).encode()

There are a couple of further ‘ascii’ entries in the library but I haven’t needed to change them yet and the emails now include the emoji’s.

@vshymanskyy you might want to tweak the official library.

1 Like