Description
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
def main():
df = pd.DataFrame({"size": 10, "status": True}, index=pd.Index(["a", "b"]))
df["status"].update({"a": False})
main()Issue Description
When running this code the warning
FutureWarning: Setting an item of incompatible dtype is deprecated and will raise in a future error of pandas. Value '[False]' has dtype incompatible with bool, please explicitly cast to a compatible dtype first.
df["status"].update(update)
Moreover, the datatype of the status column have changed from bool to object
Expected Behavior
Expect no warning and no type cast.
Installed Versions
INSTALLED VERSIONS
commit : 2a953cf
python : 3.11.5.final.0
python-bits : 64
OS : Linux
OS-release : 5.15.90.1-microsoft-standard-WSL2
Version : #1 SMP Fri Jan 27 02:56:13 UTC 2023
machine : x86_64
processor :
byteorder : little
LC_ALL : None
LANG : C.UTF-8
LOCALE : en_US.UTF-8
pandas : 2.1.3
numpy : 1.26.2
pytz : 2023.3.post1
dateutil : 2.8.2
setuptools : 68.2.2
pip : 23.2.1
Cython : 3.0.2
pytest : 7.4.3
hypothesis : 6.89.0
sphinx : None
blosc : None
feather : None
xlsxwriter : None
lxml.etree : None
html5lib : None
pymysql : None
psycopg2 : None
jinja2 : 3.1.2
IPython : 8.16.0
pandas_datareader : None
bs4 : 4.12.2
bottleneck : 1.3.7
dataframe-api-compat: None
fastparquet : None
fsspec : None
gcsfs : None
matplotlib : None
numba : None
numexpr : 2.8.4
odfpy : None
openpyxl : None
pandas_gbq : None
pyarrow : None
pyreadstat : None
pyxlsb : None
s3fs : None
scipy : None
sqlalchemy : None
tables : 3.8.0
tabulate : None
xarray : None
xlrd : None
zstandard : None
tzdata : 2023.3
qtpy : None
pyqt5 : None