Unicode symbols are not highlighted in the Editor

[laikh]

Description of the problem

When selecting a variable (double left click) in the editor all similar variables are highlighted. This does not work when the variable is a greek symbol.

What steps will reproduce the problem?

1. select variable in editor by double clicking on it

Example
α = 15
y = 2
x = α+y

selecting y in line 2 will highlight y in line 3
selecting alpha in line 1 will not highlight alpha in line 3

Versions and main components

• Spyder Version: 3.2
• Python Version: 3.6.1 Anaconda custom (64 bit)
• Qt Version: 5.6.2
• PyQt Version: PyQt5
• Operating system: Windows 10 x64

Dependencies

IPython >=4.0 : 5.3.0 (OK)
cython >=0.21 : 0.25.2 (OK)
jedi >=0.9.0 : 0.10.2 (OK)
nbconvert >=4.0 : 5.1.1 (OK)
numpy >=1.7 : 1.12.1 (OK)
pandas >=0.13.1 : 0.20.1 (OK)
pycodestyle >=2.3: 2.3.1 (OK)
pyflakes >=0.6.0 : 1.5.0 (OK)
pygments >=2.0 : 2.2.0 (OK)
pylint >=0.25 : 1.6.4 (OK)
qtconsole >=4.2.0: 4.3.0 (OK)
rope >=0.9.4 : 0.9.4-1 (OK)
sphinx >=0.6.6 : 1.5.6 (OK)
sympy >=0.7.3 : 1.0 (OK)

[stonebig]

hum, it may come from variable detection being only ascii-minded (Python2 aera) , like:

spyder/spyder/widgets/sourcecode/base.py

Line 606 in 0724278

varname = re.compile('[a-zA-Z0-9_]*') # matches valid variable names

revisiting the code may not be a simple task, see https://stackoverflow.com/questions/17043894/what-unicode-symbols-are-accepted-in-python3-variable-names

apparently there is a function str.isidentifier() https://stackoverflow.com/questions/12700893/how-to-check-if-a-string-is-a-valid-python-identifier-including-keyword-check

[goanpeca]

Thanks for the info @stonebig. I have been bitten by this in the past :-p

[goanpeca]

@rlaverde could you take a look at this one?