PyQt emit signal with dict

Question

I wanna to emit signal that is defined: ``` finished = pyqtSignal(dict) # other place it's connected to function: def finised(self, dict_result): ``` I call it `self.finished.emit({"bk": {}})` and it works. Now I call it with `self.finished.emit({2: {}})`and it don't work!! Traceback (most recent call last): File "/home/sylwek/workspace/t2-pv/Manager.py", line 452, in run self.finished.emit({2: {}}) TypeError: TesterManager.finished[dict].emit(): argument 1 has unexpected type 'dict' Is it normal? I can change `{2: {}}` to `{'2': {}}` but I would like to understand why and be sure there will be no other surprises! I use PyQt 5.8.2-2 and python 3.6.1-1 EDIT (add working example): ``` from PyQt5 import QtCore, QtWidgets from PyQt5.QtWidgets import QApplication class Emiterer(QtCore.QThread): f = QtCore.pyqtSignal(dict) def __init__(self): super(Emiterer, self).__init__() def run(self): self.f.emit({"2": {}}) # self.f.emit({2: {}}) < == this don't work! class Main(QtWidgets.QMainWindow):…

Accepted Answer

Use `object` instead of `dict` in the `pyqtSignal` definition. E.g.

```
class Emiterer(QtCore.QThread):
    f = QtCore.pyqtSignal(object)
```

The reason for this is that signals defined as `pyqtSignal(dict)` are actually interpreted the same as `pyqtSignal('QVariantMap')` by PyQt5 and QVariantMap can only have strings as keys.

You can check this (for your specific class) with

```
m = Emiterer.staticMetaObject
method = m.method(m.methodCount() - 1)  # the last defined signal or slot
print(method.methodSignature())
```

This would print `PyQt5.QtCore.QByteArray(b'f(QVariantMap)')`

PyQt emit signal with dict

Solution

Problem