BUG: True cannot be cast to bool

[NathanDWalsh]

Pandas version checks

• I have checked that this issue has not already been reported.

• I have confirmed this bug exists on the latest version of pandas.

• I have confirmed this bug exists on the main branch of pandas.

Reproducible Example

import pandas as pd

df = pd.DataFrame({"bool_column": [True]}, dtype=pd.BooleanDtype.name)
df.to_excel("test_pandas_bool.xlsx", index=False)

df2 = pd.read_excel("test_pandas_bool.xlsx", dtype={"bool_column": pd.BooleanDtype.name})

Issue Description

When:

• Reading an Excel file with pd.read_excel function
• One of the Excel columns is a boolean type
• The dtype for that column is specificed as pd.BooleanDtype

The following error is raised:

• True cannot be cast to bool

Expected Behavior

Bool literal should be read, no error should be raised.

Installed Versions

commit : bdc79c1
python : 3.11.4.final.0
python-bits : 64
OS : Windows
OS-release : 10
Version : 10.0.19045
machine : AMD64
processor : Intel64 Family 6 Model 165 Stepping 2, GenuineIntel
byteorder : little
LC_ALL : None
LANG : en_US.UTF-8
LOCALE : English_United Kingdom.1252

pandas : 2.2.1
numpy : 1.26.4
pytz : 2023.3
dateutil : 2.8.2
setuptools : 68.1.2
pip : 24.0
Cython : None
pytest : None
hypothesis : None
sphinx : None
blosc : None
feather : None
xlsxwriter : None
lxml.etree : 5.1.0
html5lib : None
pymysql : None
psycopg2 : None
jinja2 : 3.1.2
IPython : None
pandas_datareader : None
adbc-driver-postgresql: None
adbc-driver-sqlite : None
bs4 : None
bottleneck : None
dataframe-api-compat : None
fastparquet : None
fsspec : None
gcsfs : None
matplotlib : None
numba : None
numexpr : None
odfpy : None
openpyxl : 3.1.2
pandas_gbq : None
pyarrow : 12.0.1
pyreadstat : None
python-calamine : None
pyxlsb : None
s3fs : None
scipy : 1.10.1
sqlalchemy : 2.0.20
tables : None
tabulate : None
xarray : None
xlrd : None
zstandard : None
tzdata : 2023.3
qtpy : None
pyqt5 : None

[CaelThompson]

take

[aabhinavg]

"Hi, @nwalsh82 I've found a patch that could potentially fix the issue. You can find the changes in the following link: shiny-new-feature patch. Could you please take a look and see if it addresses the problem? Let me know if you have any questions about it!"

[rmhowe425]

@aabhinavg Have you created a PR for this bug? If so, could you link your PR to this issue by following the contribution guidelines?

I believe that I've found @aabhinavg's PR for this issue. It looks like it's closed because the PR went stale. Taking this issue unless @aabhinavg states that they are still interested in working on it.

[rmhowe425]

take

[asishm]

looks like similar issue as #45903 (but that may be looking at None -> Boolean whereas this is True -> boolean). If so, the PR #46374 was closed due to going stale, which I feel was close. @rmhowe425

The main issue seems to be that pd.BooleanArray._from_sequence_of_strings is getting called with values that are not strings.

[asishm]

Also @yuanx749's comment #45903 (comment) of using dtype_backed='numpy_nullable' is a workaround, but it seems to only after the dtype evaluation if defined in the read_excel call.