Merge pull request matplotlib#31867 from timhoffm/mnt-get_default_filetype

MNT: Make get_default_filetype a classmethod

Author: ksunden

lib/matplotlib/backends/backend_pdf.py

@@ -2717,7 +2717,8 @@ class FigureCanvasPdf(FigureCanvasBase):
     fixed_dpi = 72
     filetypes = {'pdf': 'Portable Document Format'}
 
-    def get_default_filetype(self):
+    @classmethod
+    def get_default_filetype(cls):
         return 'pdf'
 
     def print_pdf(self, filename, *,

lib/matplotlib/backends/backend_pgf.py

@@ -761,7 +761,8 @@ class FigureCanvasPgf(FigureCanvasBase):
                  "pdf": "LaTeX compiled PGF picture",
                  "png": "Portable Network Graphics", }
 
-    def get_default_filetype(self):
+    @classmethod
+    def get_default_filetype(cls):
         return 'pdf'
 
     def _print_pgf_to_fh(self, fh, *, bbox_inches_restore=None):

lib/matplotlib/backends/backend_ps.py

@@ -967,7 +967,8 @@ class FigureCanvasPS(FigureCanvasBase):
     filetypes = {'ps': 'Postscript',
                  'eps': 'Encapsulated Postscript'}
 
-    def get_default_filetype(self):
+    @classmethod
+    def get_default_filetype(cls):
         return 'ps'
 
     def _print_ps(

lib/matplotlib/backends/backend_svg.py

@@ -1371,7 +1371,8 @@ def print_svgz(self, filename, **kwargs):
               gzip.GzipFile(mode='w', fileobj=fh) as gzipwriter):
             return self.print_svg(gzipwriter, **kwargs)
 
-    def get_default_filetype(self):
+    @classmethod
+    def get_default_filetype(cls):
         return 'svg'
 
     def draw(self):

lib/matplotlib/backends/backend_template.py

@@ -199,7 +199,8 @@ def print_foo(self, filename, **kwargs):
         """
         self.draw()
 
-    def get_default_filetype(self):
+    @classmethod
+    def get_default_filetype(cls):
         return 'foo'