how to write to the end of a file in python
file = open('sample.txt', 'a') #the important part is to open it in mode 'a'
#when you open a file in mode 'a' it start writing at the end of it
file.write("yes you are")
#lets say the file contained this string "i am a file "
#so after we executed line 3 the string will be "i am a file yes you are"