Empty dataframe when filtering

Question

I have a dataframe that looks like this:

Now I'd like to filter like this:

df1.loc[df1['PZAE'] == 'HAE']

However, I am getting an empty dataframe.

What am I doing wrong here?

Answer 1

Try df1.loc[df1['PZAE']=="'HAE'"]

Details:

the column 'PZAE' contains str starting and finishing by ' that's why you have to include them in the condition

Answer 2

@Pi-R's answer is probably what you are looking for, but in case it is useful, you can also match partial strings like so:

df1.loc[df1['PZAE'].str.contains('HAE')]

That should also give you what you want here.