chore: enable pylint check: "no-self-use"

Enable the pylint check "no-self-use" and fix the errors detected.

3 files changed, 17 insertions, 10 deletions

diff --git a/gitlab/client.py b/gitlab/client.py
index aa612c9..0019c0e 100644
--- a/gitlab/client.py
+++ b/gitlab/client.py
@@ -515,7 +515,8 @@ class Gitlab:
                 self.http_username, self.http_password
             )
 
-    def enable_debug(self) -> None:
+    @staticmethod
+    def enable_debug() -> None:
         import logging
         from http.client import HTTPConnection  # noqa
 
@@ -534,7 +535,8 @@ class Gitlab:
             "verify": self.ssl_verify,
         }
 
-    def _get_base_url(self, url: Optional[str] = None) -> str:
+    @staticmethod
+    def _get_base_url(url: Optional[str] = None) -> str:
         """Return the base URL with the trailing slash stripped.
         If the URL is a Falsy value, return the default URL.
         Returns:
@@ -558,7 +560,8 @@ class Gitlab:
             return path
         return f"{self._url}{path}"
 
-    def _check_redirects(self, result: requests.Response) -> None:
+    @staticmethod
+    def _check_redirects(result: requests.Response) -> None:
         # Check the requests history to detect 301/302 redirections.
         # If the initial verb is POST or PUT, the redirected request will use a
         # GET request, leading to unwanted behaviour.
@@ -583,8 +586,8 @@ class Gitlab:
                 )
             )
 
+    @staticmethod
     def _prepare_send_data(
-        self,
         files: Optional[Dict[str, Any]] = None,
         post_data: Optional[Union[Dict[str, Any], bytes]] = None,
         raw: bool = False,
diff --git a/gitlab/types.py b/gitlab/types.py
index e2d988a..f811a6f 100644
--- a/gitlab/types.py
+++ b/gitlab/types.py
@@ -103,10 +103,12 @@ class LowercaseStringAttribute(GitlabAttribute):
 
 
 class FileAttribute(GitlabAttribute):
-    def get_file_name(self, attr_name: Optional[str] = None) -> Optional[str]:
+    @staticmethod
+    def get_file_name(attr_name: Optional[str] = None) -> Optional[str]:
         return attr_name
 
 
 class ImageAttribute(FileAttribute):
-    def get_file_name(self, attr_name: Optional[str] = None) -> str:
+    @staticmethod
+    def get_file_name(attr_name: Optional[str] = None) -> str:
         return f"{attr_name}.png" if attr_name else "image.png"
diff --git a/gitlab/v4/cli.py b/gitlab/v4/cli.py
index c4e15fc..3339a5a 100644
--- a/gitlab/v4/cli.py
+++ b/gitlab/v4/cli.py
@@ -371,13 +371,14 @@ def get_dict(
 
 
 class JSONPrinter:
-    def display(self, d: Union[str, Dict[str, Any]], **kwargs: Any) -> None:
+    @staticmethod
+    def display(d: Union[str, Dict[str, Any]], **kwargs: Any) -> None:
         import json  # noqa
 
         print(json.dumps(d))
 
+    @staticmethod
     def display_list(
-        self,
         data: List[Union[str, gitlab.base.RESTObject]],
         fields: List[str],
         **kwargs: Any,
@@ -388,7 +389,8 @@ class JSONPrinter:
 
 
 class YAMLPrinter:
-    def display(self, d: Union[str, Dict[str, Any]], **kwargs: Any) -> None:
+    @staticmethod
+    def display(d: Union[str, Dict[str, Any]], **kwargs: Any) -> None:
         try:
             import yaml  # noqa
 
@@ -400,8 +402,8 @@ class YAMLPrinter:
                 "to use the yaml output feature"
             )
 
+    @staticmethod
     def display_list(
-        self,
         data: List[Union[str, gitlab.base.RESTObject]],
         fields: List[str],
         **kwargs: Any,