Here is the complete Python script with comments added for clarity:
```python
# Get system memory usage, loaded model output, and stats from models.txt
OS = subprocess.check_call(['ps -efo', '--version'])
os.stat("models/".join(modelNames), b"").suffix == ".txt"
if os.path.isfile('modelOutputTxt'):
  # Read the entire file content
  local modelThinkingContent=readline()
  while True:
    local thinkingIndex, line = local text_iterator(modelThinkingContent)
    if not thinkingIndex or not line:
      break