Lesson 55 - sys.ipynb

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 "cells": [
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [],
   "source": [
    "import sys"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [
    {
     "output_type": "execute_result",
     "data": {
      "text/plain": [
       "['ipykernel_launcher',\n",
       " '--ip=127.0.0.1',\n",
       " '--stdin=9004',\n",
       " '--control=9002',\n",
       " '--hb=9000',\n",
       " '--Session.signature_scheme=\"hmac-sha256\"',\n",
       " '--Session.key=b\"d372dc58-b364-4bcd-96b7-71f6af419feb\"',\n",
       " '--shell=9003',\n",
       " '--transport=\"tcp\"',\n",
       " '--iopub=9005',\n",
       " '--f=C:\\\\Users\\\\GEORGE~1\\\\AppData\\\\Local\\\\Temp\\\\tmp-19436okD5EQgCQapQ.json']"
      ]
     },
     "metadata": {},
     "execution_count": 2
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   "source": [
    "sys.argv"
   ]
  },
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   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [
    {
     "output_type": "execute_result",
     "data": {
      "text/plain": [
       "9223372036854775807"
      ]
     },
     "metadata": {},
     "execution_count": 3
    }
   ],
   "source": [
    "sys.maxsize"
   ]
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  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [
    {
     "output_type": "execute_result",
     "data": {
      "text/plain": [
       "'win32'"
      ]
     },
     "metadata": {},
     "execution_count": 4
    }
   ],
   "source": [
    "sys.platform"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {},
   "outputs": [
    {
     "output_type": "execute_result",
     "data": {
      "text/plain": [
       "'3.9.5 (default, May 18 2021, 14:42:02) [MSC v.1916 64 bit (AMD64)]'"
      ]
     },
     "metadata": {},
     "execution_count": 5
    }
   ],
   "source": [
    "sys.version"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {},
   "outputs": [
    {
     "output_type": "stream",
     "name": "stdout",
     "text": [
      "Python 3.9.5 (default, May 18 2021, 14:42:02) [MSC v.1916 64 bit (AMD64)]\n"
     ]
    }
   ],
   "source": [
    "!python -V -V"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "metadata": {},
   "outputs": [
    {
     "output_type": "execute_result",
     "data": {
      "text/plain": [
       "sys.version_info(major=3, minor=9, micro=5, releaselevel='final', serial=0)"
      ]
     },
     "metadata": {},
     "execution_count": 7
    }
   ],
   "source": [
    "sys.version_info"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "metadata": {},
   "outputs": [
    {
     "output_type": "execute_result",
     "data": {
      "text/plain": [
       "'C:\\\\Users\\\\George Ogden\\\\miniconda3\\\\python.exe'"
      ]
     },
     "metadata": {},
     "execution_count": 8
    }
   ],
   "source": [
    "sys.executable"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 9,
   "metadata": {},
   "outputs": [
    {
     "output_type": "execute_result",
     "data": {
      "text/plain": [
       "'Copyright (c) 2001-2021 Python Software Foundation.\\nAll Rights Reserved.\\n\\nCopyright (c) 2000 BeOpen.com.\\nAll Rights Reserved.\\n\\nCopyright (c) 1995-2001 Corporation for National Research Initiatives.\\nAll Rights Reserved.\\n\\nCopyright (c) 1991-1995 Stichting Mathematisch Centrum, Amsterdam.\\nAll Rights Reserved.'"
      ]
     },
     "metadata": {},
     "execution_count": 9
    }
   ],
   "source": [
    "sys.copyright"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 10,
   "metadata": {},
   "outputs": [
    {
     "output_type": "execute_result",
     "data": {
      "text/plain": [
       "['c:\\\\Users\\\\George Ogden\\\\OneDrive\\\\Desktop\\\\Understanding Python',\n",
       " 'c:\\\\Users\\\\George Ogden\\\\.vscode\\\\extensions\\\\ms-toolsai.jupyter-2021.6.999406279\\\\pythonFiles\\\\vscode_datascience_helpers',\n",
       " 'c:\\\\Users\\\\George Ogden\\\\.vscode\\\\extensions\\\\ms-toolsai.jupyter-2021.6.999406279\\\\pythonFiles',\n",
       " 'c:\\\\Users\\\\George Ogden\\\\.vscode\\\\extensions\\\\ms-toolsai.jupyter-2021.6.999406279\\\\pythonFiles\\\\lib\\\\python',\n",
       " 'C:\\\\Users\\\\George Ogden\\\\miniconda3\\\\python39.zip',\n",
       " 'C:\\\\Users\\\\George Ogden\\\\miniconda3\\\\DLLs',\n",
       " 'C:\\\\Users\\\\George Ogden\\\\miniconda3\\\\lib',\n",
       " 'C:\\\\Users\\\\George Ogden\\\\miniconda3',\n",
       " '',\n",
       " 'C:\\\\Users\\\\George Ogden\\\\miniconda3\\\\lib\\\\site-packages',\n",
       " 'C:\\\\Users\\\\George Ogden\\\\miniconda3\\\\lib\\\\site-packages\\\\win32',\n",
       " 'C:\\\\Users\\\\George Ogden\\\\miniconda3\\\\lib\\\\site-packages\\\\win32\\\\lib',\n",
       " 'C:\\\\Users\\\\George Ogden\\\\miniconda3\\\\lib\\\\site-packages\\\\Pythonwin',\n",
       " 'C:\\\\Users\\\\George Ogden\\\\miniconda3\\\\lib\\\\site-packages\\\\IPython\\\\extensions',\n",
       " 'C:\\\\Users\\\\George Ogden\\\\.ipython']"
      ]
     },
     "metadata": {},
     "execution_count": 10
    }
   ],
   "source": [
    "sys.path"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 11,
   "metadata": {},
   "outputs": [
    {
     "output_type": "error",
     "ename": "ModuleNotFoundError",
     "evalue": "No module named 'numpy'",
     "traceback": [
      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[1;31mModuleNotFoundError\u001b[0m                       Traceback (most recent call last)",
      "\u001b[1;32m<ipython-input-11-12c6b6a25792>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m\u001b[0m\n\u001b[0;32m      1\u001b[0m \u001b[0msys\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0mpath\u001b[0m \u001b[1;33m=\u001b[0m \u001b[1;33m[\u001b[0m\u001b[1;33m]\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[1;32m----> 2\u001b[1;33m \u001b[1;32mimport\u001b[0m \u001b[0mnumpy\u001b[0m \u001b[1;32mas\u001b[0m \u001b[0mnp\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[1;31mModuleNotFoundError\u001b[0m: No module named 'numpy'"
     ]
    }
   ],
   "source": [
    "sys.path = []\n",
    "import numpy as np"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 12,
   "metadata": {},
   "outputs": [
    {
     "output_type": "stream",
     "name": "stdout",
     "text": [
      "out"
     ]
    }
   ],
   "source": [
    "sys.stdout.write(\"out\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 13,
   "metadata": {},
   "outputs": [
    {
     "output_type": "stream",
     "name": "stderr",
     "text": [
      "err"
     ]
    }
   ],
   "source": [
    "sys.stderr.write(\"err\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 14,
   "metadata": {},
   "outputs": [
    {
     "output_type": "execute_result",
     "data": {
      "text/plain": [
       "3"
      ]
     },
     "metadata": {},
     "execution_count": 14
    }
   ],
   "source": [
    "x = \"variable\"\n",
    "sys.getrefcount(x)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 15,
   "metadata": {},
   "outputs": [
    {
     "output_type": "error",
     "ename": "SystemExit",
     "evalue": "",
     "traceback": [
      "An exception has occurred, use %tb to see the full traceback.\n",
      "\u001b[1;31mSystemExit\u001b[0m\n"
     ]
    }
   ],
   "source": [
    "sys.exit()"
   ]
  }
 ]
}