Type unicode character using python variable

Question

The code point of '🐍' in hex is '0001f40d', and I store this code point in variable hex_snake. Then I want to call this icon using '\Uhex_snake' but got an error. Any ideas on expanding variables inside of quotes?

Depending on your use-case, you might want to store the name of the character instead: unicodedata.name('SNAKE') == '🐍'. — chepner
– chepner, Commented Feb 16, 2021 at 22:03

Mark Tolonen · Accepted Answer · 2021-02-17 00:38:33Z

2

The \U escape code can only be used in string literals, and must be followed by eight hexadecimal digits between 00000000-0010FFFF. But you can just store the character in your variable instead and print with f-strings:

>>> snake = '\U0001f40d'  # or '\N{SNAKE}' or chr(0x1f40d)
>>> print(f'snake = {snake}')
snake = 🐍

If you have hex digits in a string and don't want to change, the following works, but is more complicated:

>>> snake = '0001f40d'
>>> print(f'snake = {chr(int(snake,16))}')
snake = 🐍

answered Feb 17, 2021 at 0:38

Mark Tolonen

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chepner · Accepted Answer · 2021-02-16 22:05:16Z

1

The given string can be turned into an int, which can then be used as an argument for chr.

>>> x = '0001f40d'
>>> chr(int(x, base=16))
'🐍'

answered Feb 16, 2021 at 22:05

chepner

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2 Comments

JackeyOL Over a year ago

It works this way. However, I’m just curious that is there a way to achieve this using \Ux? I know in shell scripting that you can do something like \U${x}. So I just want to know if python has this feature as well.

chepner Over a year ago

\U is part of the syntax for a literal; it's not a lookup function to use with runtime data.

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