CODEWITHSUNDEEP
pythonpandasdataframe
yannickhau
yannickhau

Reputation: 405

Find NaN's in pandas.Dataframe

This is my code to check if a certain cell in my Dataframe is empty. Bfore there is a for loop to iterate over the rows. the counter is i 

if change.isna(change.iloc[i,3]):
         continue

Can't figure out why I receive the 

**TypeError**: isna() takes 1 positional argument but 2 were given

Because I just pass one argument.... Or am I wrong?

Upvotes: 1

Views: 483

Answers (1)

GPhilo
GPhilo

Reputation: 19123

The positional argument isna takes is self, because you're calling the method of pd.Dataframe (change.isna()). You're passing one argument, but that's the second argument to the function, hence the error.

Take a look at pd.Dataframe.isna's documentation: there is only self specified as argument. This is, because isna actually returns a boolean array where for each element in the dataframe it tells you whether it's a valid value or NA.

if change.iloc[i].isna()[3]:
  ....

Alternatively, use the function pandas.isna(), which takes exactly one object as argument:

if pd.isna(change.iloc[i,3]):
  ....

Upvotes: 2

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