<human>:  Give me a Python function to check if file excists on harddrive.
<bot>: Here is a Python function to check if file excists on harddrive

import os

def file_exists(filename):
  """
  Check if file exists on harddrive.
  """
  try:
    if os.path.isfile(filename):
      return True
    else:
      return False
  except OSError:
    return False

# Enter the filename
filename = "/home/rosey/Desktop/test.txt"

# Calling the function
print((file_exists(filename)))

#Example Output
# False

#Remember to inspect code for bugs.