Bug report

After updating to latest version (3.2.1) I started getting this error:

# Paste your code here
from matplotlib.backends.backend_qt4agg import FigureCanvasQTAgg as FigureCanvas
>>>from matplotlib.backends.backend_qt4agg import FigureCanvasQTAgg as FigureCanvas
Traceback (most recent call last):
  File "<pyshell#0>", line 1, in <module>
    from matplotlib.backends.backend_qt4agg import FigureCanvasQTAgg as FigureCanvas
  File "C:\Python37-32\lib\site-packages\matplotlib\backends\backend_qt4agg.py", line 5, in <module>
    from .backend_qt5agg import (
  File "C:\Python37-32\lib\site-packages\matplotlib\backends\backend_qt5agg.py", line 11, in <module>
    from .backend_qt5 import (
  File "C:\Python37-32\lib\site-packages\matplotlib\backends\backend_qt5.py", line 19, in <module>
    from .qt_compat import (
ImportError: cannot import name '_isdeleted' from 'matplotlib.backends.qt_compat' (C:\Python37-32\lib\site-packages\matplotlib\backends\qt_compat.py)

Matplotlib version

• Operating system: Windows 10
• Matplotlib version: 3.2.1
• Matplotlib backend (print(matplotlib.get_backend())):TkAgg
• Python version:3.7.6 (32Bit)
• Jupyter version (if applicable):
• Other libraries:
  altgraph 0.17
  astroid 2.3.3
  colorama 0.4.3
  cx-Freeze 6.1
  cycler 0.10.0
  future 0.18.2
  isort 4.3.21
  joblib 0.14.1
  kiwisolver 1.1.0
  lazy-object-proxy 1.4.3
  matplotlib 3.2.1
  mccabe 0.6.1
  mpmath 1.1.0
  numpy 1.18.2+mkl
  pandas 1.0.3
  pefile 2019.4.18
  pip 20.0.2
  psutil 5.7.0
  PyInstaller 4.0.dev0+d08a42c612
  pylint 2.4.4
  pyparsing 2.4.6
  PyQt4 4.11.4
  PyQt5-sip 12.7.1
  python-dateutil 2.8.1
  pytz 2019.3
  pywin32-ctypes 0.2.0
  scikit-learn 0.22.2.post1
  scipy 1.4.1
  setuptools 46.0.0
  six 1.14.0
  tailer 0.4.1
  typed-ast 1.4.1
  wrapt 1.12.1
  xlrd 1.2.0
  XlsxWriter 1.2.8