'''import os,sys,re f1=input("Enter filename:") if os.path.isfile(f1): f1=open(f1,"r+") else: print("sorry\n") print("File %s you entered is not found"%(fname)) f2=open("retrieveddata.txt","a") for line in f1: res1=re.search(r"\b[A-Z]\D+\b",line) print(res1) res11.append(res1) f2.write(res11+"\t") f1.close() f2.close()''' #program ERROR #Work On Progress.