BTW the error and traceback will look something like this:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Users/guido/src/cpython/Lib/http/client.py", line 1138, in _send_request
    self.putheader(hdr, value)
  File "/Users/guido/src/cpython/Lib/http/client.py", line 1062, in putheader
    header = _encode(header, 'ascii', 'header')
  File "/Users/guido/src/cpython/Lib/http/client.py", line 161, in _encode
    (name.title(), data[err.start:err.end], name)) from None
UnicodeEncodeError: 'ascii' codec can't encode character '\u1234' in position 3: Header ('ሴ') is not valid Latin-1. Use header.encode('utf-8') if you want to send it encoded in UTF-8.