pandas - how to convert all columns from object to float type

Question

I trying to convert all columns with '$' amount from object to float type.

With below code i couldnt remove the $ sign.

input:

df[:] = df[df.columns.map(lambda x: x.lstrip('$'))]

Answer 1

You can using extract

df=pd.DataFrame({'A':['$10.00','$10.00','$10.00']})
df.apply(lambda x : x.str.extract('(d+)',expand=False).astype(float))
Out[333]: 
      A
0  10.0
1  10.0
2  10.0

Update

df.iloc[:,9:32]=df.iloc[:,9:32].apply(lambda x : x.str.extract('(d+)',expand=False).astype(float))