import pandas as pd
import numpy as np
  
num = {'number': [1,2,np.nan,6,7,np.nan,np.nan]}
df = pd.DataFrame(num)
  
df

# import pandas
import pandas as pd
  
# read file
df = pd.read_csv("Book1.csv")
  
# print values
df

import pandas as pd
  
num = {'data': [1,"hjghjd",3,"jxsh"]}
df = pd.DataFrame(num)
  
# this will convert non-numeric 
# values into NaN values
df = pd.to_numeric(df["data"], errors='coerce')
  
df