Function back_unicode_name_matches

IPython/core/completer.py:889–917

u"""Match unicode characters back to unicode name This does ``☃`` -> ``\\snowman`` Note that snowman is not a valid python3 combining character but will be expanded. Though it will not recombine back to the snowman character by the completion machinery. This will not either back-

(text)

def back_unicode_name_matches(text):
    u"""Match unicode characters back to unicode name

    This does  ``☃`` -> ``\\snowman``

    Note that snowman is not a valid python3 combining character but will be expanded.
    Though it will not recombine back to the snowman character by the completion machinery.

    This will not either back-complete standard sequences like \\n, \\b ...

    Used on Python 3 only.
    """
    if len(text)<2:
        return u'', ()
    maybe_slash = text[-2]
    if maybe_slash != '\\':
        return u'', ()

    char = text[-1]
    # no expand on quote for completion in strings.
    # nor backcomplete standard ascii keys
    if char in string.ascii_letters or char in ['"',"'"]:
        return u'', ()
    try :
        unic = unicodedata.name(char)
        return '\\'+char,['\\'+unic]
    except KeyError:
        pass
    return u'', ()

def back_latex_name_matches(text:str):
    """Match latex characters back to unicode name