Merge from 3.x: PR #4583

Fixes #4581

spyder/widgets/variableexplorer/importwizard.py

@@ -142,6 +142,9 @@ def __init__(self, parent, text):
         self.tab_btn = QRadioButton(_("Tab"))
         self.tab_btn.setChecked(False)
         col_btn_layout.addWidget(self.tab_btn)
+        self.ws_btn = QRadioButton(_("Whitespace"))
+        self.ws_btn.setChecked(False)
+        col_btn_layout.addWidget(self.ws_btn)
         other_btn_col = QRadioButton(_("other"))
         other_btn_col.setChecked(True)
         col_btn_layout.addWidget(other_btn_col)
@@ -231,6 +234,8 @@ def get_col_sep(self):
         """Return the column separator"""
         if self.tab_btn.isChecked():
             return u"\t"
+        elif self.ws_btn.isChecked():
+            return None
         return to_text_string(self.line_edt.text())
 
     def get_row_sep(self):
@@ -462,7 +467,10 @@ def open_data(self, text, colsep=u"\t", rowsep=u"\n",
         if pd:
             self.pd_text = text
             self.pd_info = dict(sep=colsep, lineterminator=rowsep,
-                skiprows=skiprows,comment=comments)
+                skiprows=skiprows, comment=comments)
+            if colsep is None:
+                self.pd_info = dict(lineterminator=rowsep, skiprows=skiprows,
+                    comment=comments, delim_whitespace=True)
         self._table_view.process_data(text, colsep, rowsep, transpose,
                                       skiprows, comments)