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Add note on unicode build to troubleshooting guide (see #3421) [ci skip]

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Ines Montani 2019-03-19 10:27:02 +01:00
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@ -286,6 +286,29 @@ version of pip. To see which version you have installed, run `pip --version`.
</Accordion>
<Accordion title="sre_constants.error: bad character range" id="narrow-unicode">
```
sre_constants.error: bad character range
```
In [v2.1](/usage/v2-1), spaCy changed its implementation of regular expressions
for tokenization to make it up to 2-3 times faster. But this also means that
it's very important now that you run spaCy with a wide unicode build of Python.
This means that the build has 1114111 unicode characters available, instead of
only 65535 in a narrow unicode build. You can check this by running the
following command:
```bash
python -c "import sys; print(sys.maxunicode)"
```
If you're running a narrow unicode build, reinstall Python and use a wide
unicode build instead. You can also rebuild Python and set the
`--enable-unicode=ucs4` flag.
</Accordion>
<Accordion title="Unknown locale: UTF-8" id="unknown-locale">
```