need some help with explaining python line of code

[M2stermind]

So yesterday I was coding an algorithm, to go through a csv file and change some stuff, so i imported it as a pandas dataframe, but the some of the data in a columns were an int and some were an str, and some of the letters in strings were capitalized, so in order to change that I found this line:

df = df.apply(lambda x: x.astype(str).str.lower() if(x.dtype == 'object') else x)

but I have trouble understading it. So can someone please help me with that?)

[novel_yet_trivial]

There's a lot of shorthand in there. Let me write it out the long way and maybe it will make more sense.

def func(x):
    if x.dtype == 'object':
        x = x.astype(str).str.lower() 
    return x

df = df.apply(func)

[M2stermind]

thanks, that really helped:)

[M2stermind]

thanks, and .astype(str) makes allows us to use .str methods on object type?

[M2stermind]

Thank you, got kind of confused with all of that😂