Answers for "check nan value in pandas series python"

count nan pandas

#Python, pandas
#Count missing values for each column of the dataframe df

df.isnull().sum()

find position of nan pandas

# position of NaN values in terms of index
df.loc[pandas.isna(df["b"]), :].index

# position of NaN values in terms of rows that cotnain NaN
df.loc[pandas.isna(df["b"]), :]

find nan values in a column pandas

df['your column name'].isnull().sum()