python易错点 | AttributeError: 'xxxx' object has no attribute 'xxxx'

迷南。 2023-07-07 08:56 1阅读 0赞

今天继续在学pyqt，跟着教程一个个敲代码的时候，以下代码出现错误：

import sys
    from PyQt5.QtCore import *
    from PyQt5.QtGui import *
    from PyQt5.QtWidgets import *
    
    class QPushButtonDemo(QDialog):
        def __init__(self):
            super(QPushButtonDemo,self).__init__()
            self.initUI()
    
    	    def initUI(self):
    	        self.setWindowTitle('QPushButton Demo')
    	
    	        layout=QVBoxLayout()
    	
    	        self.button1=QPushButton('第一个按钮')
    	        self.button1.setText('First button')
    	        self.button1.setCheckable(True)
    	        self.button1.toggle()
    	        self.button1.clicked.connect(lambda:self.whichButton(self.button1))
    	        layout.addWidget(self.button1)
    	
    	        self.setLayout(layout)
    	        def whichButton(self,btn):
    	            print('被单击的按钮是<'+btn.text()+'>')
    
    if __name__=='__main__':
        app=QApplication(sys.argv)
        main=QPushButtonDemo()
        main.show()
        sys.exit(app.exec_())

报错：

Traceback (most recent call last):
      File "E:/ICE的身家性命/iceplan0401/python课程/pylearning/pyqt/QPushButtonDemo.py", line 29, in <module>
        main=QPushButtonDemo()
      File "E:/ICE的身家性命/iceplan0401/python课程/pylearning/pyqt/QPushButtonDemo.py", line 9, in __init__
        self.initUI()
    AttributeError: 'QPushButtonDemo' object has no attribute 'initUI'

我一个字一个地对教程，觉得怎么也灭有敲错啊，然后愕然发现，initUI这个函数被我多按了一个tab，按照python的规则就是归属于上一个函数了，难怪一直报错，这就属于对基础不熟练常犯的错误，写个博客记录一下。

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQzMTQ1OTI2_size_16_color_FFFFFF_t_70]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQzMTQ1OTI2_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20200222154519238.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQzMTQ1OTI2,size_16,color_FFFFFF,t_70