Answers for "check for na pandas"

to detect if a data frame has nan values

df.isnull().sum().sum()
5

to detect if a data frame has nan values

> df.isnull().any().any()
True

pandas df where row has na

df[df.isna().any(axis=1)]

count na pandas

>>> df = pd.DataFrame({"Person":
...                    ["John", "Myla", "Lewis", "John", "Myla"],
...                    "Age": [24., np.nan, 21., 33, 26],
...                    "Single": [False, True, True, True, False]})
>>> df
   Person   Age  Single
0    John  24.0   False
1    Myla   NaN    True
2   Lewis  21.0    True
3    John  33.0    True
4    Myla  26.0   False

df.count()
Person    5
Age       4
Single    5
dtype: int64