PyQt信号和槽

qt里的信号和槽除了可以传递行为外，还可以传递数据，这里以传递DataFrame为例

import pandas as pd
from PyQt5.QtCore import pyqtSignal
from PyQt5.QtCore import QObject

class A(QObject):
    sig = pyqtSignal(pd.DataFrame)#信号变量
    def __init__(self):
        super(A, self).__init__()
        self.sig.connect(B.f_slot)#信号连接到槽函数
    def f_sig(self, df):
        #其它操作
        self.sig.emit(df)#发出信号
     
class B(QObject):
    def __init__(self):
        super(B, self).__init__()

    def f_slot(df):#槽函数
        print(df)
    
a = A()
d = {'aa' : [1,2], 'bb' : ['b','b']}
df = pd.DataFrame(data = d)
a.f_sig(df)