python open file append

with open(filename, "a+") as f:
  f.write('Hello World')

file = open("text.txt", "w") 
file.write("Your text goes here") 
file.close() 
'r' open for reading (default)
'w' open for writing, truncating the file first
'x' open for exclusive creation, failing if the file already exists
'a' open for writing, appending to the end of the file if it exists

f = open("data.txt", "a")
f.write("a b c")
f.close()

f = open("data.txt", "r")
print(f.read()) 

file = open(“testfile.txt”, “r+”) 

  f = open("demofile3.txt", "w")

  f.write("Woops! I have deleted the content!")
  f.write(10)
f.close()


  #open and read the file after the appending:
f = open("demofile3.txt", "r")

  print(f.read()) 

  f = open("demofile3.txt", "w")

  f.write("Woops! I have deleted the content!")
  f.write(10)
  
f.close()


  #open and read the file after the appending:
f = open("demofile3.txt", "r")

  print(f.read())