Ako opraviťchyba hodnoty v Pythone

ako opraviťchyba hodnoty v Pythone

filename = "language.txt"
#open file for writing
fileHandler = open (filename, "w")

#Add some text
fileHandler.write("Bash\n")
fileHandler.write("Python\n")
fileHandler.write("PHP\n")

#close the file
fileHandler.close()

#open file the  file and read the data

filehandler = open(filename, "r")

#Read the  file by line

for line in fileHandler:
    print(line)

#close the  file
fileHandler.close()