Cleanup: use const variables where possible in the Python API

source/blender/python/gpu/gpu_py_shader.c

@@ -78,7 +78,7 @@ static int bpygpu_uniform_location_get(GPUShader *shader,
                                        const char *name,
                                        const char *error_prefix)
 {
-  int uniform = GPU_shader_get_uniform(shader, name);
+  const int uniform = GPU_shader_get_uniform(shader, name);
 
   if (uniform == -1) {
     PyErr_Format(PyExc_ValueError, "%s: uniform %.32s not found", error_prefix, name);
@@ -158,7 +158,7 @@ static PyObject *bpygpu_shader_uniform_from_name(BPyGPUShader *self, PyObject *a
     return NULL;
   }
 
-  int uniform = bpygpu_uniform_location_get(self->shader, name, "GPUShader.get_uniform");
+  const int uniform = bpygpu_uniform_location_get(self->shader, name, "GPUShader.get_uniform");
 
   if (uniform == -1) {
     return NULL;
@@ -184,7 +184,7 @@ static PyObject *bpygpu_shader_uniform_block_from_name(BPyGPUShader *self, PyObj
     return NULL;
   }
 
-  int uniform = GPU_shader_get_uniform_block(self->shader, name);
+  const int uniform = GPU_shader_get_uniform_block(self->shader, name);
 
   if (uniform == -1) {
     PyErr_Format(PyExc_ValueError, "GPUShader.get_uniform_block: uniform %.32s not found", name);
@@ -504,7 +504,7 @@ static PyObject *bpygpu_shader_attr_from_name(BPyGPUShader *self, PyObject *arg)
     return NULL;
   }
 
-  int attr = GPU_shader_get_attribute(self->shader, name);
+  const int attr = GPU_shader_get_attribute(self->shader, name);
 
   if (attr == -1) {
     PyErr_Format(PyExc_ValueError, "GPUShader.attr_from_name: attribute %.32s not found", name);

source/blender/python/gpu/gpu_py_vertex_buffer.c

@@ -134,7 +134,7 @@ static bool bpygpu_vertbuf_fill_impl(GPUVertBuf *vbo,
       return false;
     }
 
-    uint comp_len = pybuffer.ndim == 1 ? 1 : (uint)pybuffer.shape[1];
+    const uint comp_len = pybuffer.ndim == 1 ? 1 : (uint)pybuffer.shape[1];
 
     if (pybuffer.shape[0] != vbo->vertex_len) {
       PyErr_Format(

source/blender/python/gpu/gpu_py_vertex_format.c

@@ -112,7 +112,7 @@ static int bpygpu_ParseVertCompType(PyObject *o, void *p)
     return 0;
   }
 
-  int comp_type = bpygpu_parse_component_type(str, length);
+  const int comp_type = bpygpu_parse_component_type(str, length);
   if (comp_type == -1) {
     PyErr_Format(PyExc_ValueError, "unknown component type: '%s", str);
     return 0;
@@ -132,7 +132,7 @@ static int bpygpu_ParseVertFetchMode(PyObject *o, void *p)
     return 0;
   }
 
-  int fetch_mode = bpygpu_parse_fetch_mode(str, length);
+  const int fetch_mode = bpygpu_parse_fetch_mode(str, length);
   if (fetch_mode == -1) {
     PyErr_Format(PyExc_ValueError, "unknown type literal: '%s'", str);
     return 0;