Add CountryCodeSource.to_string() helper

python/phonenumbers/phonenumber.py

@@ -17,7 +17,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 from .util import UnicodeMixin, ImmutableMixin, mutating_method
-from .util import to_long, unicod, rpr, force_unicode
+from .util import to_long, unicod, rpr, force_unicode, u
 
 
 class CountryCodeSource(object):
@@ -48,6 +48,20 @@ class CountryCodeSource(object):
     # supplied as France.
     FROM_DEFAULT_COUNTRY = 20
 
+    @classmethod
+    def to_string(cls, val):
+        """Return a string representation of a CountryCodeSource value"""
+        if val == CountryCodeSource.UNSPECIFIED:
+            return u("UNSPECIFIED")
+        elif val == CountryCodeSource.FROM_NUMBER_WITH_PLUS_SIGN:
+            return u("FROM_NUMBER_WITH_PLUS_SIGN")
+        elif val == CountryCodeSource.FROM_NUMBER_WITH_IDD:
+            return u("FROM_NUMBER_WITH_IDD")
+        elif val == CountryCodeSource.FROM_DEFAULT_COUNTRY:
+            return u("FROM_DEFAULT_COUNTRY")
+        else:
+            return u("INVALID (%d)" % val)
+
 
 class PhoneNumber(UnicodeMixin):
     """Class representing international telephone numbers.

python/phonenumbers/phonenumber.pyi

@@ -9,6 +9,8 @@ class CountryCodeSource:
     FROM_NUMBER_WITH_IDD: int
     FROM_NUMBER_WITHOUT_PLUS_SIGN: int
     FROM_DEFAULT_COUNTRY: int
+    @classmethod
+    def to_string(cls, val: int) -> str: ...
 
 class PhoneNumber(UnicodeMixin):
     country_code: int | None