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POwhen and how to use PySide QEventLoop
 

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  1. POwhen and how to use PySide QEventLoop
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    <p>I have an application in which I tried using a while loop but the application just hangs, and now I think I need to use QEventLoop to make the application work here is some of the relevant code</p> <pre><code>def ex_initialator(self): """ sets up things for the problem runner """ print "ayadara" print "self.start_button_status this is...::" ,self.start_button_status #:Pop up dialogs no_options_selected = QtGui.QMessageBox() select_range = QtGui.QMessageBox() select_op_type = QtGui.QMessageBox() #:Shows message if no options selected if len(self.op_types) &lt; 1 and len(self.num_range) &lt; 1 and self.start_button_status == 0: print "Please pick from the options provided" no_options_selected.exec_() #:Shows message if range is not selected if len(self.op_types) &gt;= 1 and len(self.num_range) &lt; 1 and self.start_button_status == 0 : print "Please pick at least one of the ranges" select_range.exec_() #:Shows message if op_type/s not selected if len(self.op_types) &lt; 1 and len(self.num_range) &gt;= 1 and self.start_button_status == 0: print "Please pick at least one of the operation types" select_op_type.exec_() #:Correct inputs initiates problem maker if len(self.op_types) &gt;= 1 and len(self.num_range) &gt;= 1 and (self.start_button_status == 0 or self.start_button_status == 1): self.start_button_status = 1 self.prob_signal.runner_sig.connect(self.problem_runner) self.prob_signal.runner_sig.emit() def problem_runner(self): """ Expression Makers """ while self.start_button_status == 1: #:picks range types range_type = random.choice(self.num_range) D = decimal.Decimal self.answer_lineEdit.returnPressed.connect(self.ex_evaluator) self.answer_lineEdit.clear() </code></pre> <p>what I want is to be able to start, pause, and stop buttons, I'm a beginner so I might have gone wrong in using QLineEdit in which case I would appreciate some suggestions as to a better implementation</p> <p><img src="https://i.stack.imgur.com/mAQrY.png" alt="enter image description here"></p>
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