Python - Turn all items in a Dataframe to strings

Question

I followed the following procedure: In Python, how do I convert all of the items in a list to floats? because each column of my Dataframe is list, but instead o

Answer 1

You can use this:

df = df.astype(str)

out of curiosity I decided to see if there is any difference in efficiency between the accepted solution and mine.

The results are below:

example df:

df = pd.DataFrame([list(range(1000))], index=[0])

test df.astype:

%timeit df.astype(str) 
>> 100 loops, best of 3: 2.18 ms per loop

test df.applymap:

%timeit df.applymap(str)
1 loops, best of 3: 245 ms per loop

It seems df.astype is quite a lot faster :)