DeprecationWarning: Flags not at the start of the expression

[marko-travelperk]

Happens every time when I run unit tests that call phonenumbers.match python 3.6, probably

 DeprecationWarning: Flags not at the start of the expression '(?:[(\\[（［+＋][-x‐-―−ー' (truncated)
    _REGEX_FLAGS)

This similar issue has a few recommendations to resolve the same issue https://github.com/gboeing/osmnx/issues/285

[daviddrysdale]

I'm not immediately seeing this with Python 3.6.9 – please could you provide more details (exact versions of Python and the library, line number traces, full terminal output etc.)

[daviddrysdale]

Closing for now, please re-open if/when repro details become available.

[koleror]

I have the exact same issue, using python 3.6.11, and phonenumbers==7.7.5 Here is a simple code to reproduce:

import warnings
warnings.filterwarnings("error")
from phonenumber_field.modelfields import PhoneNumberField

---------------------------------------------------------------------------
DeprecationWarning                        Traceback (most recent call last)
<ipython-input-2-0acfdf99daab> in <module>
----> 1 from phonenumber_field.modelfields import PhoneNumberField

~/.virtualenvs/core3/lib/python3.6/site-packages/phonenumber_field/modelfields.py in <module>
      4 from django.db import models
      5 from django.utils.translation import ugettext_lazy as _
----> 6 from phonenumber_field.validators import validate_international_phonenumber
      7 from phonenumber_field import formfields
      8 from phonenumber_field.phonenumber import PhoneNumber, to_python, string_types

~/.virtualenvs/core3/lib/python3.6/site-packages/phonenumber_field/validators.py in <module>
      5 from django.core.exceptions import ValidationError
      6 from django.utils.translation import ugettext_lazy as _
----> 7 from phonenumber_field.phonenumber import to_python
      8
      9

~/.virtualenvs/core3/lib/python3.6/site-packages/phonenumber_field/phonenumber.py in <module>
      2
      3 import sys
----> 4 import phonenumbers
      5 from django.core import validators
      6 from phonenumbers.phonenumberutil import NumberParseException

~/.virtualenvs/core3/lib/python3.6/site-packages/phonenumbers/__init__.py in <module>
    131                               is_emergency_number,
    132                               is_carrier_specific)
--> 133 from .phonenumbermatcher import PhoneNumberMatch, PhoneNumberMatcher, Leniency
    134
    135

~/.virtualenvs/core3/lib/python3.6/site-packages/phonenumbers/phonenumbermatcher.py in <module>
    120                       _DIGIT_SEQUENCE + u("(?:") + _PUNCTUATION + _DIGIT_SEQUENCE + u(")") + _BLOCK_LIMIT +
    121                       u("(?:") + _EXTN_PATTERNS_FOR_MATCHING + u(")?"),
--> 122                       _REGEX_FLAGS)
    123
    124 # Matches strings that look like publication pages. Example: "Computing

~/.pyenv/versions/3.6.11/lib/python3.6/re.py in compile(pattern, flags)
    231 def compile(pattern, flags=0):
    232     "Compile a regular expression pattern, returning a pattern object."
--> 233     return _compile(pattern, flags)
    234
    235 def purge():

~/.pyenv/versions/3.6.11/lib/python3.6/re.py in _compile(pattern, flags)
    299     if not sre_compile.isstring(pattern):
    300         raise TypeError("first argument must be string or compiled pattern")
--> 301     p = sre_compile.compile(pattern, flags)
    302     if not (flags & DEBUG):
    303         if len(_cache) >= _MAXCACHE:

~/.pyenv/versions/3.6.11/lib/python3.6/sre_compile.py in compile(p, flags)
    560     if isstring(p):
    561         pattern = p
--> 562         p = sre_parse.parse(p, flags)
    563     else:
    564         pattern = None

~/.pyenv/versions/3.6.11/lib/python3.6/sre_parse.py in parse(str, flags, pattern)
    853
    854     try:
--> 855         p = _parse_sub(source, pattern, flags & SRE_FLAG_VERBOSE, 0)
    856     except Verbose:
    857         # the VERBOSE flag was switched on inside the pattern.  to be

~/.pyenv/versions/3.6.11/lib/python3.6/sre_parse.py in _parse_sub(source, state, verbose, nested)
    414     while True:
    415         itemsappend(_parse(source, state, verbose, nested + 1,
--> 416                            not nested and not items))
    417         if not sourcematch("|"):
    418             break

~/.pyenv/versions/3.6.11/lib/python3.6/sre_parse.py in _parse(source, state, verbose, nested, first)
    741                                     ' (truncated)' if len(source.string) > 20 else '',
    742                                 ),
--> 743                                 DeprecationWarning, stacklevel=nested + 6
    744                             )
    745                         if (state.flags & SRE_FLAG_VERBOSE) and not verbose:

DeprecationWarning: Flags not at the start of the expression '(?:[(\\[（［+＋][-x‐-―−ー' (truncated)

[daviddrysdale]

If the version of phonenumbers involved is indeed 7.7.5, that's nearly 5 years old. Please could you try reproducing with a more recent version of the library (and preferably with just the phonenumbers library involved, not phonenumber_field).