<human>:  read file and covert to int.
<bot>: Here is a Python code to read a file and covert to int

import sys

def read_file(filename):
  """Reads a file and returns its contents as an integer.

  If the file does not exist, returns -1.
  """
  try:
    with open(filename, 'r') as f:
      return int(f.read())
  except IOError:
    return -1

# Enter the function name
function_name = "memory_used"

# Calling the function
print((read_file(function_name)))

#Example Output
# -1

#Remember to inspect code for bugs.