参数 1 有意外的类型“NoneType"?
问题描述
我的 PyQt 按钮操作有问题.我想发送一个带有函数的字符串,但我收到了这个错误:
I have a problem with my PyQt button action. I would like to send a String with the Function but I got this Error:
TypeError:参数 1 具有意外类型NoneType"
TypeError: argument 1 has unexpected type 'NoneType'
import sys
from PyQt5.QtWidgets import QApplication, QPushButton, QAction
from PyQt5.QtCore import QObject, pyqtSignal
from PyQt5.QtGui import *
from PyQt5.uic import *
app = QApplication(sys.argv)
cocktail = loadUi('create.ui')
def mixCocktail(str):
cocktail.show()
cocktail.showFullScreen()
cocktail.lbl_header.setText(str)
widget = loadUi('drinkmixer.ui')
widget.btn_ckt1.clicked.connect(mixCocktail("string"))
widget.show()
sys.exit(app.exec_())
解决方案
根据 user3030010 和 ekhumoro 它需要一个可调用的函数.在这种情况下,您应该将该参数替换为 lambda: mixCocktail("string")
AND ALSO 不要使用 str
它是 python 内置数据类型,我已将其替换为 _str
As suggested by user3030010 and ekhumoro it expects a callable function. In which case you should replace that argument with lambda: mixCocktail("string")
AND ALSO don't use str
it's a python built-in datatype I have replaced it with _str
import sys
from PyQt5.QtWidgets import QApplication, QPushButton, QAction
from PyQt5.QtCore import QObject, pyqtSignal
from PyQt5.QtGui import *
from PyQt5.uic import *
app = QApplication(sys.argv)
cocktail = loadUi('create.ui')
def mixCocktail(_str):
cocktail.show()
cocktail.showFullScreen()
cocktail.lbl_header.setText(_str)
widget = loadUi('drinkmixer.ui')
widget.btn_ckt1.clicked.connect(lambda: mixCocktail("string"))
widget.show()
sys.exit(app.exec_())
关于 lambda 函数的更多信息:什么是 lambda(函数)?一个>
More about lambda functions: What is a lambda (function)?
相关文章