Fixed some annotations compat. (<Py3.10)

Author: PierreRaybaut

doc/requirements.rst

@@ -17,10 +17,10 @@ The :mod:`plotpy` package requires the following Python modules:
       - >=0.10
       - Qt plotting widgets for Python
     * - NumPy
-      - >=1.3
+      - >=1.17
       - Fundamental package for array computing in Python
     * - SciPy
-      - >=0.7
+      - >=1.3
       - Fundamental algorithms for scientific computing in Python
     * - Pillow
       - 

plotpy/tests/gui/test_cross_section_oblique.py

@@ -35,7 +35,7 @@ def __init__(self, parent=None, toolbar=True, title=None, options=None):
         for tool in (ObliqueCrossSectionTool, OCSPanelTool, ImageMaskTool):
             self.manager.add_tool(tool)
 
-    def populate_plot_layout(self) -> None:
+    def populate_plot_layout(self):
         """Populate the plot layout"""
         super().populate_plot_layout()
         ra_panel = ObliqueCrossSection(self)

plotpy/tests/gui/test_image_masked.py

@@ -12,6 +12,8 @@
 
 # guitest: show
 
+from __future__ import annotations
+
 import os.path as osp
 
 from plotpy.builder import make

plotpy/tests/gui/test_image_masked_xy.py

@@ -12,6 +12,8 @@
 
 # guitest: show
 
+from __future__ import annotations
+
 from plotpy import io
 from plotpy.builder import make
 from plotpy.tests.gui.test_image_masked import MaskedImageTest

plotpy/tests/gui/test_loadsaveitems_hdf5.py

@@ -10,6 +10,8 @@
 # WARNING:
 # This script requires read/write permissions on current directory
 
+from __future__ import annotations
+
 from guidata.dataset.io import HDF5Reader, HDF5Writer
 
 from plotpy.tests.gui.test_loadsaveitems_pickle import IOTest

plotpy/tests/gui/test_loadsaveitems_json.py

@@ -26,6 +26,8 @@
 # WARNING:
 # This script requires read/write permissions on current directory
 
+from __future__ import annotations
+
 from guidata.dataset.io import JSONReader, JSONWriter
 
 from plotpy.tests.gui.test_loadsaveitems_pickle import IOTest

plotpy/tests/gui/test_syncplot.py

@@ -5,6 +5,8 @@
 
 """Testing plot with synchronized axes"""
 
+from __future__ import annotations
+
 import numpy as np
 from guidata.qthelpers import qt_app_context
 from qtpy import QtCore as QC

plotpy/tests/gui/test_transform.py

@@ -7,6 +7,8 @@
 
 # guitest: show
 
+from __future__ import annotations
+
 import os
 
 import numpy as np

plotpy/tests/unit/test_geometry.py

@@ -7,6 +7,8 @@
 Unit tests for geometry module
 """
 
+from __future__ import annotations
+
 import numpy as np
 
 from plotpy.mathutils import geometry as geom