Description
Pandas version checks
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I have checked that this issue has not already been reported.
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I have confirmed this bug exists on the latest version of pandas.
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I have confirmed this bug exists on the main branch of pandas.
Reproducible Example
import pandas as pd
pd_float_64 = pd.Series([1.234], dtype=pd.Float64Dtype)Issue Description
If I do the lines above in pandas 2.0.3 or earlier versions, there is no error.
If I do the same in pandas 2.1.0rc0 it will fail with a TypeError:
TypeError: 'in <string>' requires string as left operand, not pandas._libs.properties.CachedProperty
I also tried installing the development version, and the issue is also present there.
It seems this is related to the change on line 777 in pandas.core.construction.py
Changed from elif dtype.kind in ["m", "M"]: to elif dtype.kind in "mM":
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "C:\Users\****\Miniconda3\envs\testingenvironmentPreview\lib\site-packages\pandas\core\series.py", line 512, in __init__
data = sanitize_array(data, index, dtype, copy)
File "C:\Users\****\Miniconda3\envs\testingenvironmentPreview\lib\site-packages\pandas\core\construction.py", line 621, in sanitize_array
subarr = _try_cast(data, dtype, copy)
File "C:\Users\****\Miniconda3\envs\testingenvironmentPreview\lib\site-packages\pandas\core\construction.py", line 777, in _try_cast
elif dtype.kind in "mM":
TypeError: 'in <string>' requires string as left operand, not pandas._libs.properties.CachedProperty
Expected Behavior
Expected it to work like before.
Installed Versions
INSTALLED VERSIONS
commit : 6e194cf
python : 3.9.17.final.0
python-bits : 64
OS : Windows
OS-release : 10
Version : 10.0.22621
machine : AMD64
processor : Intel64 Family 6 Model 158 Stepping 13, GenuineIntel
byteorder : little
LC_ALL : None
LANG : None
LOCALE : English_United Kingdom.1252
pandas : 2.1.0rc0
numpy : 1.26.0b1
pytz : 2023.3
dateutil : 2.8.2
setuptools : 68.0.0
pip : 23.2.1
Cython : None
pytest : None
hypothesis : None
sphinx : None
blosc : None
feather : None
xlsxwriter : None
lxml.etree : None
html5lib : None
pymysql : None
psycopg2 : None
jinja2 : None
IPython : None
pandas_datareader : None
bs4 : None
bottleneck : None
brotli : None
dataframe-api-compat: None
fastparquet : None
fsspec : None
gcsfs : None
matplotlib : None
numba : None
numexpr : None
odfpy : None
openpyxl : None
pandas_gbq : None
pyarrow : None
pyreadstat : None
pyxlsb : None
s3fs : None
scipy : None
snappy : None
sqlalchemy : None
tables : None
tabulate : None
xarray : None
xlrd : None
zstandard : None
tzdata : 2023.3
qtpy : None
pyqt5 : None