I'm trying to replace all of the "?" in my dataframe with "NaN" values. I have tried doing this:
for i in list(df):
lst = list(df.i)
for y in lst:
if y == "?":
x = y.replace("?", "NaN")
df[i] = df[i].replace(x,y)
df
It spits out an error saying dataframe has not attribute "i". i is each column in the data frame, lst is a list of each row in every column. y is every object in lst. Is there a way to bypass so that I can get lst = list(df.columnName) for every column? Thank you!
