打开文本文件txt，从中读取数据@pyqtSlot()
defon_menu_files_open_triggered(self):
"""
Slot documentation goes here.
"""
# TODO: not implemented yet
print("打开")
my_file_path = QFileDialog.getOpenFileName(self,"打开文件","/","*.txt")
print(my_file_path)
f =open(my_file_path[0],"r", encoding="utf-8")
my_data = f.read()
f.close()
self.textBrowser.append(my_data)
注意
1 QFileDialog.getOpenFileName 传出的是一个（str，str）元组
2 此处打开文件时，一定要注意编码格式，为UTF-8
此时，发现打开文件后，弹出的文件对话框没有关闭
解决办法：
@pyqtSlot()
defon_menu_files_open_triggered(self):
"""
Slot documentation goes here.
"""
# TODO: not implemented yet
print("打开")
dialog = QFileDialog()
my_file_path = dialog.getOpenFileName(self,"打开文件","/","*.txt")
print(my_file_path)
f =open(my_file_path[0],"r", encoding="utf-8")
my_data = f.read()
f.close()
self.textBrowser.append(my_data)
将文本框内容保存到文本
注意：在使用open时，一定要注意参数和编码方式
@pyqtSlot()
defon_menu_files_save_triggered(self):
"""
Slot documentation goes here.
"""
# TODO: not implemented yet
print("保存")
my_data = self.textBrowser.toPlainText()
dialog_save = QFileDialog()
my_file = dialog_save.getSaveFileName(self,"文件另存为","/")
print(my_file)
f =open(my_file[0],"w", encoding="utf-8")
f.write(my_data)
f.close()
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