[FIX] base_import: handling of scientific notation

Steps to reproduce:
-install sales
-try to import a product file with volumes set to scientific notation
(9.2e-05 for example)

Previous behavior:
scientific notation is not recognized by the base_import module
and raises a small warning

Current behavior:
scientific notation is converted to decimal notation on the fly
when possible

opw-2162353

closes odoo/odoo#42591

X-original-commit: 9acd76c5d116abd07207af3b548658ad983ff82d
Signed-off-by: Jorge Pinna Puissant (jpp) <jpp@odoo.com>

addons/base_import/models/base_import.py

@@ -723,6 +723,16 @@ class Import(models.TransientModel):
             if not line[index]:
                 continue
             thousand_separator, decimal_separator = self._infer_separators(line[index], options)
+
+            if 'E' in line[index] or 'e' in line[index]:
+                tmp_value = line[index].replace(thousand_separator, '.')
+                try:
+                    tmp_value = '{:f}'.format(float(tmp_value))
+                    line[index] = tmp_value
+                    thousand_separator = ' '
+                except Exception:
+                    pass
+
             line[index] = line[index].replace(thousand_separator, '').replace(decimal_separator, '.')
             old_value = line[index]
             line[index] = self._remove_currency_symbol(line[index])

addons/base_import/tests/test_base_import.py

@@ -468,6 +468,27 @@ class test_convert_import_data(TransactionCase):
         self.assertEqual(float(result[0][-1]), 5.69)
         self.assertEqual(str(result[0][-2]), '2017-10-12')
 
+    def test_parse_scientific_notation(self):
+        """ Ensure that scientific notation is correctly converted to decimal """
+        import_wizard = self.env['base_import.import']
+
+        test_options = {}
+        test_data = [
+            ["1E+05"],
+            ["1.20E-05"],
+            ["1,9e5"],
+            ["9,5e-5"],
+        ]
+        expected_result = [
+            ["100000.000000"],
+            ["0.000012"],
+            ["190000.000000"],
+            ["0.000095"],
+        ]
+
+        import_wizard._parse_float_from_data(test_data, 0, 'test-name', test_options)
+        self.assertEqual(test_data, expected_result)
+
     def test_filtered(self):
         """ If ``False`` is provided as field mapping for a column,
         that column should be removed from importable data