import pandas  as pd

df  = pd.read_csv("new_o.csv")
df1 = pd.read_csv('new_.csv')
c = 0 
for i in df.index:
    print(i)
    df.at[i,'last_crawled'] = '1604071357'
    for j in df1.index:
        if df1.at[j,'alias'] == df.at[i,'alias']:
            df.at[i,'last_crawled'] = df1.at[j,'last_crawled']

    
df.to_csv("new_n.csv",index=False)