Python добавляет на файл
with open(filename, "a+") as f:
f.write('Hello World')
Nutty Narwhal
with open(filename, "a+") as f:
f.write('Hello World')# Open a file with access mode 'a'
file_object = open('sample.txt', 'a')
# Append 'hello' at the end of file
file_object.write('hello')
# Close the file
file_object.close()
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"