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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
df = pd.DataFrame({"a": [1, 2, np.nan, 3]})
df = df.assign(not_null_assign = lambda x: (~pd.isna(x.a))) # correct
df['not_null_apply'] = df.apply(lambda x: True if (~pd.isna(x.a)) else False, axis=1) #incorrect
df['not_null_apply_and'] = df.apply(lambda x: True if (~pd.isna(x.a) & (1==1)) else False, axis=1) # correct
Issue Description
The use of the bitwise NOT ~ seems inconsistent in the above examples. I wonder if there is a bug in how pandas interprets apply when ~ is used within the conditional statement.
Expected Behavior
I would expect all three to correctly report whether the value is null.
Installed Versions
INSTALLED VERSIONS
commit : 4bfe3d0
python : 3.9.12.final.0
python-bits : 64
OS : Darwin
OS-release : 23.4.0
Version : Darwin Kernel Version 23.4.0: Wed Feb 21 21:44:06 PST 2024; root:xnu-10063.101.15~2/RELEASE_ARM64_T8103
machine : x86_64
processor : i386
byteorder : little
LC_ALL : None
LANG : en_US.UTF-8
LOCALE : en_US.UTF-8
pandas : 1.4.2
numpy : 1.21.5
pytz : 2021.3
dateutil : 2.8.2
pip : 21.2.4
setuptools : 61.2.0
Cython : 0.29.28
pytest : 7.1.1
hypothesis : None
sphinx : 4.4.0
blosc : None
feather : None
xlsxwriter : 3.0.3
lxml.etree : 4.8.0
html5lib : 1.1
pymysql : None
psycopg2 : None
jinja2 : 3.1.2
IPython : 8.3.0
pandas_datareader: None
bs4 : 4.11.1
bottleneck : 1.3.4
brotli :
fastparquet : None
fsspec : 2022.02.0
gcsfs : None
markupsafe : 2.0.1
matplotlib : 3.5.1
numba : 0.55.1
numexpr : 2.8.1
odfpy : None
openpyxl : 3.0.9
pandas_gbq : None
pyarrow : None
pyreadstat : None
pyxlsb : None
s3fs : None
scipy : 1.7.3
snappy : None
sqlalchemy : 1.4.32
tables : 3.6.1
tabulate : None
xarray : None
xlrd : 2.0.1
xlwt : 1.3.0
zstandard : None