CODEWITHSUNDEEP
pythonunicodestring
xax
xax

Reputation: 2120

Can't use unichr in Python 3.1

I've been looking through the Python Cookbook (2nd Edition) to learn how to process strings and characters.

I wanted to try converting a number into its Unicode equivalent. So I tried using the built-in function called 'unichr', which, according to the Cookbook, goes something like:

>>> print repr(unichr(8224))

... and will output:

u'\u2020'

However, the code failed. I thought it had something to do with print (because Python 3 uses print() instead of print ""), but that didn't work out as well. I tried several variations to the code, and it still failed. At long last, I just typed a simple line:

unichr(10000)

To my surprise, this error message kept popping up, no matter what value I put into the above function:

 NameError: name 'unichr' is not defined

What could be the problem? Is there some specific module that I'm supposed to import?

Upvotes: 87

Views: 81355

Answers (5)

shellbye
shellbye

Reputation: 4838

As suggestted by this is a better way to do it for it is compatible for both 2 and 3:

# Python 2 and 3:
from builtins import chr
assert chr(8364) == '€'

And you may need pip install future incase some error occures.

Upvotes: 8

Mark Byers
Mark Byers

Reputation: 838376

In Python 3, you just use chr:

>>> chr(10000)
'✐'

Upvotes: 113

mork
mork

Reputation: 1863

In case you need to run in both python 2 and python 3, you can use this common syntax (the unused syntax would point to the new one)

try:
    unichr
except NameError:
    unichr = chr

Upvotes: 7

AndiDog
AndiDog

Reputation: 70148

In Python 3, there's no difference between unicode and normal strings anymore. Only between unicode strings and binary data. So the developers finally removed the unichr function in favor of a common chr which now does what the old unichr did. See the documentation here.

Upvotes: 24

Jürgen A. Erhard
Jürgen A. Erhard

Reputation: 4860

Python 3.x doesn't have a special Unicode string type/class. Every string is a Unicode string. So... I'd try chr. Should give you what unichr did pre-3.x. Can't test, sadly.

Upvotes: 6

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