How to deal with tables in QGridLayout acting weird

Question

I'm having trouble fitting 2 tables into QGridLayout. I've read some examples and thought I got the grip of it. Apparently, I didn't. This is how I visualized it:

So I supposed this code should work:

layout = QGridLayout()
layout.addWidget(smalltable, 0, 1, 1, 2)
layout.addWidget(bigtable, 1, 0, 4, 4)

But instead I got something like this:

Answer 1

One possible solution is to set the stretch factor using setRowStretch():

import sys

from PyQt5.QtWidgets import QApplication, QGridLayout, QTableWidget, QWidget

app = QApplication(sys.argv)

smalltable = QTableWidget(4, 4)
bigtable = QTableWidget(5, 5)

w = QWidget()

layout = QGridLayout(w)
layout.addWidget(smalltable, 0, 1, 1, 2)
layout.addWidget(bigtable, 1, 0, 1, 4)
layout.setRowStretch(0, 1)
layout.setRowStretch(1, 4)

w.resize(640, 480)
w.show()

sys.exit(app.exec_())