Fix multiline script error (#6581)

Syntax errors emerged when running multiline scripts in the console
when using the run() command.

electrum/gui/qt/console.py

@@ -80,10 +80,7 @@ class Console(QtWidgets.QPlainTextEdit):
         with open(filename) as f:
             script = f.read()
 
-        # eval is generally considered bad practice. use it wisely!
-        result = eval(script, self.namespace, self.namespace)
-
-
+        self.exec_command(script)
 
     def updateNamespace(self, namespace):
         self.namespace.update(namespace)
@@ -205,13 +202,18 @@ class Console(QtWidgets.QPlainTextEdit):
         for i in range(len(self.prompt) + position):
             self.moveCursor(QtGui.QTextCursor.Right)
 
-    def runCommand(self):
+    def run_command(self):
         command = self.getCommand()
         self.addToHistory(command)
 
         command = self.getConstruct(command)
 
         if command:
+            self.exec_command(command)
+        self.newPrompt('')
+        self.set_json(False)
+
+    def exec_command(self, command):
         tmp_stdout = sys.stdout
 
         class stdoutProxy():
@@ -232,7 +234,6 @@ class Console(QtWidgets.QPlainTextEdit):
         if type(self.namespace.get(command)) == type(lambda:None):
             self.appendPlainText("'{}' is a function. Type '{}()' to use it in the Python console."
                                  .format(command, command))
-                self.newPrompt('')
             return
 
         sys.stdout = stdoutProxy(self.appendPlainText)
@@ -257,9 +258,6 @@ class Console(QtWidgets.QPlainTextEdit):
                 traceback_lines.pop(i)
             self.appendPlainText('\n'.join(traceback_lines))
         sys.stdout = tmp_stdout
-        self.newPrompt('')
-        self.set_json(False)
-
 
     def keyPressEvent(self, event):
         if event.key() == QtCore.Qt.Key_Tab:
@@ -269,7 +267,7 @@ class Console(QtWidgets.QPlainTextEdit):
         self.hide_completions()
 
         if event.key() in (QtCore.Qt.Key_Enter, QtCore.Qt.Key_Return):
-            self.runCommand()
+            self.run_command()
             return
         if event.key() == QtCore.Qt.Key_Home:
             self.setCursorPosition(0)