deprecation warnings on python 3.9

[wbolster]

importing the vobject module using python 3.9 results in these warnings:

DeprecationWarning: invalid escape sequence

details:

../../../usr/local/lib/python3.9/site-packages/vobject/base.py:736
  /usr/local/lib/python3.9/site-packages/vobject/base.py:736: DeprecationWarning: invalid escape sequence \-
    patterns['name'] = '[a-zA-Z0-9\-_]+'
../../../usr/local/lib/python3.9/site-packages/vobject/base.py:1219
  /usr/local/lib/python3.9/site-packages/vobject/base.py:1219: DeprecationWarning: invalid escape sequence \;
    s = s.replace("\\", "\\\\").replace(";", "\;").replace(",", "\,")

[da4089]

@wbolster, I'm unable to reproduce this using Python 3.9.18 and current GitHub code (which is unchanged from the lines quoted above).

Are you able to confirm it is happening for you still?

[wbolster]

are you sure warnings are actually shown? i can reproduce this with py39 – py312:

$ python3.9 -Wa -c "'[a-zA-Z0-9\-_]+'"
<string>:1: DeprecationWarning: invalid escape sequence \-

$ python3.10 -Wa -c "'[a-zA-Z0-9\-_]+'"
<string>:1: DeprecationWarning: invalid escape sequence '\-'

$ python3.11 -Wa -c "'[a-zA-Z0-9\-_]+'"
<string>:1: DeprecationWarning: invalid escape sequence '\-'

$ python3.12 -Wa -c "'[a-zA-Z0-9\-_]+'"
<string>:1: SyntaxWarning: invalid escape sequence '\-'

note how py312 turned it from DeprecationWarning into SyntaxWarning

[da4089]

I see that too (using -Wa), but actually importing the vobject module doesn't show those warnings. Which is a little odd, because vobject.base.patterns['name'] is initialized, so it has been parsed.

[da4089]

Fixed in https://github.com/py-vobject/vobject/pull/21, thanks for the report!

[wbolster]

thanks!