我的机器上运行着 anaconda。几天前我不得不更新一些库，因为它们已经过时了。更新后，由于以下错误，我无法再启动 anaconda-navigator 或 spyder：
(base) C:\>qtpy.PythonQtError: No Qt bindings could be found
我尝试了以下方法：
*卸载/重新安装整个包*以下命令：
conda update conda
conda update --all
conda install pyqt5
pip install pyqt5
*重置 spyder 设置
已安装的软件包和 URL：
(base) C:\>SPYDER
Traceback (most recent call last):
File "C:\ProgramData\Anaconda3\lib\site-packages\qtpy\__init__.py", line 202, in <module>
from PySide import __version__ as PYSIDE_VERSION # analysis:ignore
ModuleNotFoundError: No module named 'PySide'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "C:\ProgramData\Anaconda3\Scripts\spyder-script.py", line 10, in <module>
sys.exit(main())
File "C:\ProgramData\Anaconda3\lib\site-packages\spyder\app\start.py", line 186, in main
from spyder.app import mainwindow
File "C:\ProgramData\Anaconda3\lib\site-packages\spyder\app\mainwindow.py", line 48, in <module>
requirements.check_qt()
File "C:\ProgramData\Anaconda3\lib\site-packages\spyder\requirements.py", line 41, in check_qt
import qtpy
File "C:\ProgramData\Anaconda3\lib\site-packages\qtpy\__init__.py", line 208, in <module>
raise PythonQtError('No Qt bindings could be found')
qtpy.PythonQtError: No Qt bindings could be found
(base) C:\>conda list --show-channel-urls
# packages in environment at C:\ProgramData\Anaconda3:
#
# Name Version Build Channel
_ipyw_jlab_nb_ext_conf 0.1.0 py37_0 defaults
alabaster 0.7.12 py_0 conda-forge
anaconda custom py37_0 defaults
anaconda-client 1.7.2 py_0 conda-forge
anaconda-navigator 1.9.7 py37_0 defaults
anaconda-project 0.8.2 py_1 conda-forge
asn1crypto 0.24.0 py37_1003 conda-forge
astroid 2.2.5 py37_0 conda-forge
astropy 3.1.2 py37hfa6e2cd_0 conda-forge
atomicwrites 1.3.0 py_0 conda-forge
attrs 19.1.0 py_0 conda-forge
babel 2.6.0 py_1 conda-forge
backcall 0.1.0 py_0 conda-forge
backports 1.0 py_2 conda-forge
backports.os 0.1.1 py37_1000 conda-forge
backports.shutil_get_terminal_size 1.0.0 py_3 conda-forge
beautifulsoup4 4.7.1 py37_1001 conda-forge
bitarray 0.9.2 py37hfa6e2cd_0 conda-forge
bkcharts 0.2 py37_0 defaults
blas 1.0 mkl conda-forge
bleach 3.1.0 py_0 conda-forge
blinker 1.4 py_1 conda-forge
blosc 1.16.3 h6538335_0 conda-forge
bokeh 1.1.0 py37_0 conda-forge
boto 2.49.0 py_0 conda-forge
boto3 1.9.143 py_0 conda-forge
botocore 1.12.143 py_1 conda-forge
bottleneck 1.2.1 py37h452e1ab_1001 conda-forge
bz2file 0.98 py_0 conda-forge
bzip2 1.0.6 hfa6e2cd_1002 conda-forge
ca-certificates 2019.3.9 hecc5488_0 conda-forge
certifi 2019.3.9 py37_0 conda-forge
cffi 1.12.3 py37hb32ad35_0 conda-forge
chardet 3.0.4 py37_1003 conda-forge
click 7.0 py_0 conda-forge
cloudpickle 0.8.1 py_0 conda-forge
clyent 1.2.2 py_1 conda-forge
colorama 0.4.1 py_0 conda-forge
comtypes 1.1.7 py37_1000 conda-forge
conda 4.6.14 py37_0 conda-forge
conda-build 3.17.8 py37_1 conda-forge
conda-env 2.6.0 1 conda-forge
conda-verify 3.1.1 py37_1000 conda-forge
console_shortcut 0.1.1 3 defaults
contextlib2 0.5.5 py_2 conda-forge
cryptography 2.6.1 py37hb32ad35_0 conda-forge
curl 7.64.1 h4496350_0 conda-forge
cycler 0.10.0 py_1 conda-forge
cython 0.29.7 py37h6538335_0 conda-forge
cytoolz 0.9.0.1 py37hfa6e2cd_1001 conda-forge
dask 1.2.0 py_0 conda-forge
dask-core 1.2.0 py_0 conda-forge
decorator 4.4.0 py_0 conda-forge
defusedxml 0.5.0 py_1 conda-forge
distributed 1.27.1 py37_0 conda-forge
docutils 0.14 py37_1001 conda-forge
entrypoints 0.3 py37_1000 conda-forge
et_xmlfile 1.0.1 py37_1000 conda-forge
fastcache 1.1.0 py37hfa6e2cd_0 conda-forge
filelock 3.0.10 py_0 conda-forge
flask 1.0.2 py_2 conda-forge
freetype 2.10.0 h5db478b_0 conda-forge
future 0.17.1 py37_1000 conda-forge
gensim 3.7.1 py37h6538335_1 conda-forge
get_terminal_size 1.0.0 h38e98db_0 defaults
gevent 1.4.0 py37hfa6e2cd_0 conda-forge
glob2 0.6 py_0 conda-forge
greenlet 0.4.15 py37hfa6e2cd_0 conda-forge
h5py 2.9.0 nompi_py37h3cb27cb_1102 conda-forge
hdf5 1.10.4 nompi_hcc15c50_1106 conda-forge
heapdict 1.0.0 py37_1000 conda-forge
html5lib 1.0.1 py_0 conda-forge
icc_rt 2019.0.0 h0cc432a_1 defaults
icu 58.1 vc14_0 conda-forge
idna 2.8 py37_1000 conda-forge
imageio 2.5.0 py37_0 conda-forge
imagesize 1.1.0 py_0 conda-forge
importlib_metadata 0.9 py37_0 conda-forge
intel-openmp 2019.3 203 defaults
ipykernel 5.1.0 py37h39e3cac_1002 conda-forge
ipython 7.5.0 py37h39e3cac_0 conda-forge
ipython_genutils 0.2.0 py_1 conda-forge
ipywidgets 7.4.2 py_0 conda-forge
isort 4.3.18 py37_0 conda-forge
itsdangerous 1.1.0 py_0 conda-forge
jdcal 1.4.1 py_0 conda-forge
jedi 0.13.3 py37_0 conda-forge
jinja2 2.10.1 py_0 conda-forge
jmespath 0.9.4 py_0 conda-forge
jpeg 9c hfa6e2cd_1001 conda-forge
jsonschema 3.0.1 py37_0 conda-forge
jupyter 1.0.0 py_2 conda-forge
jupyter_client 5.2.4 py_3 conda-forge
jupyter_console 6.0.0 py_0 conda-forge
jupyter_core 4.4.0 py_0 conda-forge
jupyterlab 0.35.6 py37_0 conda-forge
jupyterlab_server 0.2.0 py_0 conda-forge
keyring 19.0.1 py37_0 conda-forge
kiwisolver 1.1.0 py37he980bc4_0 conda-forge
krb5 1.16.3 hdd46e55_1001 conda-forge
lazy-object-proxy 1.3.1 py37hfa6e2cd_1000 conda-forge
libarchive 3.3.3 h0005e80_1004 conda-forge
libblas 3.8.0 8_mkl conda-forge
libcblas 3.8.0 8_mkl conda-forge
libcurl 7.64.1 h4496350_0 conda-forge
libiconv 1.15 hfa6e2cd_1005 conda-forge
liblief 0.9.0 ha925a31_2 defaults
libpng 1.6.37 h7602738_0 conda-forge
libsodium 1.0.16 h2fa13f4_1001 conda-forge
libssh2 1.8.2 h642c060_2 conda-forge
libtiff 4.0.10 h016b793_1002 conda-forge
libxml2 2.9.9 h9ce36c8_0 conda-forge
libxslt 1.1.32 heafd4d3_1002 conda-forge
llvmlite 0.28.0 py37_0 conda-forge
locket 0.2.0 py_2 conda-forge
lxml 4.3.3 py37heafd4d3_0 conda-forge
lz4-c 1.8.3 he025d50_1001 conda-forge
lzo 2.10 hfa6e2cd_1000 conda-forge
m2w64-gcc-libgfortran 5.3.0 6 defaults
m2w64-gcc-libs 5.3.0 7 defaults
m2w64-gcc-libs-core 5.3.0 7 defaults
m2w64-gmp 6.1.0 2 defaults
m2w64-libwinpthread-git 5.0.0.4634.697f757 2 defaults
markupsafe 1.1.1 py37hfa6e2cd_0 conda-forge
matplotlib 3.0.3 py37_1 conda-forge
matplotlib-base 3.0.3 py37h3e3dc42_1 conda-forge
mccabe 0.6.1 py_1 conda-forge
menuinst 1.4.16 py37_0 conda-forge
mistune 0.8.4 py37hfa6e2cd_1000 conda-forge
mkl 2019.3 203 defaults
mkl-service 2.0.1 py37hfa6e2cd_0 conda-forge
mkl_fft 1.0.12 py37hfa6e2cd_1 conda-forge
mkl_random 1.0.4 py37h830ac7b_0 conda-forge
mock 3.0.4 py37_0 conda-forge
more-itertools 4.3.0 py37_1000 conda-forge
mpmath 1.1.0 py_0 conda-forge
msgpack-python 0.6.1 py37he980bc4_0 conda-forge
msys2-conda-epoch 20160418 1 defaults
multipledispatch 0.6.0 py_0 conda-forge
navigator-updater 0.2.1 py37_0 defaults
nbconvert 5.5.0 py_0 conda-forge
nbformat 4.4.0 py_1 conda-forge
networkx 2.3 py_0 conda-forge
nltk 3.2.5 py_0 conda-forge
nose 1.3.7 py37_1002 conda-forge
notebook 5.7.8 py37_0 conda-forge
numba 0.43.1 py37hf9181ef_0 defaults
numexpr 2.6.9 py37h6538335_1000 conda-forge
numpy 1.16.3 py37h19fb1c0_0 defaults
numpy-base 1.16.3 py37hc3f5095_0 defaults
numpydoc 0.9.1 py_0 conda-forge
oauthlib 3.0.1 py_0 conda-forge
olefile 0.46 py_0 conda-forge
openpyxl 2.6.1 py_0 conda-forge
openssl 1.1.1b hfa6e2cd_2 conda-forge
packaging 19.0 py_0 conda-forge
pandas 0.24.2 py37h6538335_0 conda-forge
pandoc 2.7.2 0 conda-forge
pandocfilters 1.4.2 py_1 conda-forge
parso 0.4.0 py_0 conda-forge
partd 0.3.9 py_0 conda-forge
path.py 12.0.1 py_0 conda-forge
pathlib2 2.3.3 py37_1000 conda-forge
patsy 0.5.1 py_0 conda-forge
pep8 1.7.1 py_0 conda-forge
pickleshare 0.7.5 py37_1000 conda-forge
pillow 6.0.0 py37h9a613e6_0 conda-forge
pip 19.1.1 py37_0 conda-forge
pkginfo 1.5.0.1 py_0 conda-forge
pluggy 0.9.0 py_0 conda-forge
ply 3.11 py_1 conda-forge
powershell_shortcut 0.0.1 2 defaults
prometheus_client 0.6.0 py_0 conda-forge
prompt_toolkit 2.0.9 py_0 conda-forge
psutil 5.6.2 py37hfa6e2cd_0 conda-forge
py 1.8.0 py_0 conda-forge
py-lief 0.9.0 py37ha925a31_2 defaults
pycodestyle 2.5.0 py_0 conda-forge
pycosat 0.6.3 py37hfa6e2cd_1001 conda-forge
pycparser 2.19 py37_1 conda-forge
pycrypto 2.6.1 py37hfa6e2cd_1002 conda-forge
pycurl 7.43.0.2 py37h636d3bd_0 conda-forge
pyflakes 2.1.1 py_0 conda-forge
pygments 2.3.1 py_0 conda-forge
pyjwt 1.7.1 py_0 conda-forge
pylint 2.3.1 py37_0 conda-forge
pyodbc 4.0.26 py37h6538335_0 conda-forge
pyopenssl 19.0.0 py37_0 conda-forge
pyparsing 2.4.0 py_0 conda-forge
pyqt 5.9.2 py37h6538335_2 defaults
pyreadline 2.1 py37_1000 conda-forge
pyrsistent 0.15.1 py37hfa6e2cd_0 conda-forge
pysocks 1.6.8 py37_1002 conda-forge
pytables 3.5.1 py37hb9ab341_1 conda-forge
pytest 4.4.1 py37_0 conda-forge
pytest-arraydiff 0.3 py_0 conda-forge
pytest-astropy 0.5.0 py_0 conda-forge
pytest-doctestplus 0.3.0 py_0 conda-forge
pytest-openfiles 0.3.1 py_0 conda-forge
pytest-remotedata 0.3.1 py_0 conda-forge
python 3.7.3 hb12ca83_0 conda-forge
python-crfsuite 0.9.6 py37he980bc4_1000 conda-forge
python-dateutil 2.8.0 py_0 conda-forge
python-libarchive-c 2.8 py37_1004 conda-forge
pytz 2019.1 py_0 conda-forge
pywavelets 1.0.3 py37h452e1ab_1 conda-forge
pywin32 224 py37hfa6e2cd_1000 conda-forge
pywin32-ctypes 0.2.0 py37_1000 conda-forge
pywinpty 0.5.5 py37_1000 conda-forge
pyyaml 5.1 py37hfa6e2cd_0 conda-forge
pyzmq 18.0.1 py37he7828b0_1 conda-forge
qt 5.9.7 hc6833c9_1 conda-forge
qtawesome 0.5.7 pyh8a2030e_0 conda-forge
qtconsole 4.4.3 py_0 conda-forge
qtpy 1.7.1 pyhde82777_0 conda-forge
requests 2.21.0 py37_1000 conda-forge
requests-oauthlib 1.2.0 py_0 conda-forge
rope 0.14.0 py_0 conda-forge
ruamel_yaml 0.15.71 py37hfa6e2cd_1000 conda-forge
s3transfer 0.2.0 py37_0 conda-forge
scikit-image 0.15.0 py37h6538335_0 conda-forge
scikit-learn 0.20.3 py37h3d241f0_1 conda-forge
scipy 1.2.1 py37h29ff71c_0 defaults
seaborn 0.9.0 py_1 conda-forge
send2trash 1.5.0 py_0 conda-forge
setuptools 41.0.1 py37_0 conda-forge
simplegeneric 0.8.1 py_1 conda-forge
singledispatch 3.4.0.3 py37_1000 conda-forge
sip 4.19.8 py37h6538335_1000 conda-forge
six 1.12.0 py37_1000 conda-forge
smart_open 1.8.3 py_0 conda-forge
snappy 1.1.7 h6538335_1002 conda-forge
snowballstemmer 1.2.1 py_1 conda-forge
sortedcollections 1.1.2 py_0 conda-forge
sortedcontainers 2.1.0 py_0 conda-forge
soupsieve 1.9.1 py37_0 conda-forge
sphinx 2.0.1 py_0 conda-forge
sphinxcontrib 1.0 py37_1 defaults
sphinxcontrib-applehelp 1.0.1 py_0 conda-forge
sphinxcontrib-devhelp 1.0.1 py_0 conda-forge
sphinxcontrib-htmlhelp 1.0.2 py_0 conda-forge
sphinxcontrib-jsmath 1.0.1 py_0 conda-forge
sphinxcontrib-qthelp 1.0.2 py_0 conda-forge
sphinxcontrib-serializinghtml 1.1.1 py_0 conda-forge
sphinxcontrib-websupport 1.1.0 py_1 conda-forge
spyder 3.3.4 py37_0 defaults
spyder-kernels 0.4.4 py37_0 conda-forge
sqlalchemy 1.3.3 py37hfa6e2cd_0 conda-forge
sqlite 3.26.0 hfa6e2cd_1001 conda-forge
statsmodels 0.9.0 py37hfa6e2cd_1000 conda-forge
sympy 1.4 py37_0 conda-forge
tblib 1.3.2 py_1 conda-forge
terminado 0.8.2 py37_0 conda-forge
testpath 0.4.2 py_1001 conda-forge
tk 8.6.9 hfa6e2cd_1001 conda-forge
toolz 0.9.0 py_1 conda-forge
tornado 6.0.2 py37hfa6e2cd_0 conda-forge
tqdm 4.31.1 py_0 conda-forge
traitlets 4.3.2 py37_1000 conda-forge
twython 3.7.0 py_0 conda-forge
unicodecsv 0.14.1 py_1 conda-forge
urllib3 1.24.2 py37_0 conda-forge
vc 14.1 h0510ff6_4 defaults
vs2015_runtime 14.15.26706 h3a45250_4 defaults
wcwidth 0.1.7 py_1 conda-forge
webencodings 0.5.1 py_1 conda-forge
werkzeug 0.15.2 py_0 conda-forge
wheel 0.33.1 py37_0 conda-forge
widgetsnbextension 3.4.2 py37_1000 conda-forge
win_inet_pton 1.1.0 py37_0 conda-forge
win_unicode_console 0.5 py37_1000 conda-forge
wincertstore 0.2 py37_1002 conda-forge
winpty 0.4.3 4 conda-forge
wrapt 1.11.1 py37hfa6e2cd_0 conda-forge
xlrd 1.2.0 py_0 conda-forge
xlsxwriter 1.1.8 py_0 conda-forge
xlwings 0.15.8 py37_0 conda-forge
xlwt 1.3.0 py_1 conda-forge
xz 5.2.4 h2fa13f4_1001 conda-forge
yaml 0.1.7 hfa6e2cd_1001 conda-forge
zeromq 4.3.1 he025d50_1000 conda-forge
zict 0.1.4 py_0 conda-forge
zipp 0.4.0 py_0 conda-forge
zlib 1.2.11 h2fa13f4_1004 conda-forge
zstd 1.3.3 vc14_1 conda-forge
(base) C:\>
(base) C:\>CONDA INSTALL pyqt5
有人知道有什么帮助吗？提前谢谢！
答案1
我遇到了类似的问题，但对我来说，解决方案很简单。请阅读以下几点。
- 在你的机器上安装本机 Python。
- 从 cmd 运行“pip install pyqt5-tools”。
- 安装后，您应该在屏幕上看到一条消息 - “已成功安装 click-7.0 pyqt5-5.13.0 pyqt5-tools-5.13.0.1.5 python-dotenv-0.10.3”：
希望这对你有用:)
答案2
在更新到 spyder 4.0.1 后，我遇到了同样的问题“qtpy.PythonQtError: 找不到 Qt 绑定”
尝试后$pip3 install -U pyqt5 --user我收到错误消息：
_'错误：spyder 4.0.1 要求 pyqt5<5.13；python_version >=“3”，但您拥有的 pyqt5 5.14.1 不兼容。'_
因此我更新了一个兼容的版本：
pip3 install pyqt5==5.12 --user
现在 spyder 正在运行。
答案3
对我来说真正有效的解决方法是安装导致错误的模块，因为我确实这样做了。那就是 PySide 模块。
pip install PySide除非您使用的是 Python 3.4 或更低版本，否则请不要安装 PySide ( )。
如果您运行的是 Python 3.4 及更高版本（最高 3.7），则需要安装 PySide2 ( pip install PySide2)。
答案4
原因可能是您使用的环境与 PyQt 的安装环境不同。我使用的是 anaconda 环境。通常pip install在 conda 中不起作用（至少对我来说）。我使用了命令
conda install pyqt，它起作用了。希望这能有所帮助