diff --git a/.flake8 b/.flake8
index e650938d299..1cfa96eca75 100644
--- a/.flake8
+++ b/.flake8
@@ -28,7 +28,6 @@ per-file-ignores =
     gui/wxpython/vdigit/*: F841, E722, F405, F403
     gui/wxpython/animation/g.gui.animation.py: E501
     gui/wxpython/tplot/g.gui.tplot.py: E501
-    gui/wxpython/iclass/frame.py: F405, F403
     gui/wxpython/iclass/g.gui.iclass.py: E501
     gui/wxpython/iclass/statistics.py: F841, F405, F403
     gui/wxpython/location_wizard/wizard.py: E722
diff --git a/gui/wxpython/iclass/frame.py b/gui/wxpython/iclass/frame.py
index b19d8d7d3ac..e594d1860fb 100644
--- a/gui/wxpython/iclass/frame.py
+++ b/gui/wxpython/iclass/frame.py
@@ -18,17 +18,38 @@
 @author Anna Kratochvilova <kratochanna gmail.com>
 """
 
-import os
 import copy
+import os
 import tempfile
+from ctypes import byref, pointer
 
 import wx
 
-from ctypes import *
-
 try:
-    from grass.lib.imagery import *
-    from grass.lib.vector import *
+    from grass.lib.imagery import (
+        I_free_group_ref,
+        I_free_signatures,
+        I_iclass_add_signature,
+        I_iclass_analysis,
+        I_iclass_create_raster,
+        I_iclass_free_statistics,
+        I_iclass_init_group,
+        I_iclass_init_signatures,
+        I_iclass_init_statistics,
+        I_iclass_statistics_set_nstd,
+        I_iclass_write_signatures,
+        I_init_group_ref,
+        I_init_signatures,
+        IClass_statistics,
+        Ref,
+        Signature,
+    )
+    from grass.lib.vector import (
+        Vect_area_alive,
+        Vect_get_map_box,
+        Vect_get_num_areas,
+        bound_box,
+    )
 
     haveIClass = True
     errMsg = ""
@@ -37,37 +58,35 @@
     errMsg = _("Loading imagery lib failed.\n%s") % e
 
 import grass.script as gs
-
-from mapdisp import statusbar as sb
-from mapdisp.main import StandaloneMapDisplayGrassInterface
-from mapwin.buffered import BufferedMapWindow
-from vdigit.toolbars import VDigitToolbar
-from gui_core.mapdisp import DoubleMapPanel, FrameMixin
 from core import globalvar
+from core.gcmd import GError, GMessage, RunCommand
 from core.render import Map
-from core.gcmd import RunCommand, GMessage, GError
+from dbmgr.vinfo import VectorDBInfo
+from grass.pydispatch.signal import Signal
 from gui_core.dialogs import SetOpacityDialog
+from gui_core.mapdisp import DoubleMapPanel, FrameMixin
 from gui_core.wrap import Menu
-from dbmgr.vinfo import VectorDBInfo
+from mapdisp import statusbar as sb
+from mapdisp.main import StandaloneMapDisplayGrassInterface
+from mapwin.buffered import BufferedMapWindow
+from vdigit.toolbars import VDigitToolbar
 
-from iclass.digit import IClassVDigitWindow, IClassVDigit
-from iclass.toolbars import (
-    IClassMapToolbar,
-    IClassMiscToolbar,
-    IClassToolbar,
-    IClassMapManagerToolbar,
-)
-from iclass.statistics import StatisticsData
 from iclass.dialogs import (
     IClassCategoryManagerDialog,
-    IClassGroupDialog,
-    IClassSignatureFileDialog,
     IClassExportAreasDialog,
+    IClassGroupDialog,
     IClassMapDialog,
+    IClassSignatureFileDialog,
 )
+from iclass.digit import IClassVDigit, IClassVDigitWindow
 from iclass.plots import PlotPanel
-
-from grass.pydispatch.signal import Signal
+from iclass.statistics import StatisticsData
+from iclass.toolbars import (
+    IClassMapManagerToolbar,
+    IClassMapToolbar,
+    IClassMiscToolbar,
+    IClassToolbar,
+)
 
 
 class IClassMapPanel(DoubleMapPanel):