convert entire pandas dataframe to integers in pandas (0.17.0)

Question

My question is very similar to this one, but I need to convert my entire dataframe instead of just a series. The to_numeric function only works on one series at

Answer 1

apply() the pd.to_numeric with errors='ignore' and assign it back to the DataFrame:

df = pd.DataFrame({'ints': ['3', '5'], 'Words': ['Kobe', 'Bryant']})
print ("Orig: \n",df.dtypes)

df.apply(pd.to_numeric, errors='ignore')
print ("\nto_numeric: \n",df.dtypes)

df = df.apply(pd.to_numeric, errors='ignore')
print ("\nto_numeric with assign: \n",df.dtypes)

Output:

Orig: 
 ints     object
Words    object
dtype: object

to_numeric: 
 ints     object
Words    object
dtype: object

to_numeric with assign: 
 ints      int64
Words    object
dtype: object