testing when pandas type-casts INF strings to np.inf

pandas-inf-typecast-output.txt

a sample <class 'str'> False
b inf <class 'numpy.float64'> True
c inf <class 'numpy.float64'> True
d inf <class 'numpy.float64'> True
e inf <class 'numpy.float64'> True

pandas-inf-typecast.py

import pandas as pd
import numpy as np
from io import StringIO

csv_str = """a,b,c,d,e
sample,INF,inf,Inf,iNf
"""
df = pd.read_csv(StringIO(csv_str))

for col in df.columns:
    val= df.loc[0,col]
    print(col, val, type(val), val == np.inf)