[X] I have checked that this issue has not already been reported.[X] I have confirmed this bug exists on the latest vers...

[x] I have checked that this issue has not already been reported.[x] I have confirmed this bug exists on the latest vers...

Pandas version checks[X] I have checked that this issue has not already been reported.[X] I have confirmed this bug exis...

Pandas version checks[X] I have checked that this issue has not already been reported.[X] I have confirmed this bug exis...

[x] I have checked that this issue has not already been reported.[x] I have confirmed this bug exists on the latest vers...

Feature Type[x] Adding new functionality to pandas[ ] Changing existing functionality in pandas[ ] Removing existing fun...

Pandas version checks[X] I have checked that this issue has not already been reported.[X] I have confirmed this bug exis...

Pandas version checks[X] I have checked that this issue has not already been reported.[X] I have confirmed this bug exis...

Code Sample, a copy-pastable example if possibleIn [2]: pd.to_timedelta(0, unit='ms') - pd.to_timedelta(123, unit='ms')O...

Pandas version checks[X] I have checked that this issue has not already been reported.[X] I have confirmed this bug exis...

Feature Type[X] Adding new functionality to pandas[ ] Changing existing functionality in pandas[ ] Removing existing fun...

[x] I have checked that this issue has not already been reported.[x] I have confirmed this bug exists on the latest vers...

In[2]: import pandas as pd ...: import numpy as np ...: pd.__version__Out[2]: u'0.23.4'In[3]: ts = pd.Series([np.nan, ...

Pandas version checks[X] I have checked that this issue has not already been reported.[X] I have confirmed this bug exis...

[x] I have checked that this issue has not already been reported.[x] I have confirmed this bug exists on the latest vers...

Code Sample, a copy-pastable example if possibleProblem descriptionI tried to search to see if this issue was raised bef...

pandas.ArrowDtype and nullable types define numpy_dtype to express the analogous NumPy type. Should ExtensionDtype.numpy...

Code Sampleimport pandas as pddf = pd.DataFrame(columns = ['a', 'b'])def foo(row): return Truedef bar(row): row['a...

Feature Type[ ] Adding new functionality to pandas[x] Changing existing functionality in pandas[ ] Removing existing fun...

Pandas version checks[x] I have checked that this issue has not already been reported.[x] I have confirmed this bug exis...