我希望能够删除此文本文件中的特定行

Question

I have the following code which must delete a specific line in the text file notes.txt :

f = open("notes.txt","r+")

notestext = f.read()

print("NOTES:")

print(notestext)

enter = input("Press enter to add or change notes \n")

print("Type delete to delete a note or add to add a note")

start = input()
if start == "add":
    notetoadd = input("Type your note to add \n")
    f.write("\n")
    f.write(notetoadd)

Here is the problem, i dunno what to put here:

if start == "delete":
    notetodelete = input("Type the note you want to delete \n")
f.close()

Answer 1

Search for the note you want to delete using the string.index() method. You can then use string.replace() method to get your string after it gets deleted