問題描述

我的 PyQt 按鈕操作有問題.我想發送一個帶有函數的字符串，但我收到了這個錯誤:

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:參數 1 具有意外類型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_())

推薦答案

根據 user3030010 和 ekhumoro 它需要一個可調用的函數.在這種情況下，您應該將該參數替換為 lambda: mixCocktail("string")AND ALSO 不要使用 str 它是 python 內置數據類型，我已將其替換為 _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_())

關于 lambda 函數的更多信息:什么是 lambda(函數)?

More about lambda functions: What is a lambda (function)?

這篇關于參數 1 有意外的類型“NoneType"?的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！