Skyfield_rename

{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 7,
   "metadata": {
    "collapsed": false
   },
   "outputs": [],
   "source": [
    "from skyfield.api import load, now\n",
    "import os"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "[#################################] 100% de421.bsp\n"
     ]
    },
    {
     "ename": "PermissionError",
     "evalue": "[WinError 32] The process cannot access the file because it is being used by another process: 'de421.bsp.download' -> 'de421.bsp'",
     "output_type": "error",
     "traceback": [
      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[1;31mPermissionError\u001b[0m                           Traceback (most recent call last)",
      "\u001b[1;32m<ipython-input-2-e26dedc7f54f>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m()\u001b[0m\n\u001b[1;32m----> 1\u001b[1;33m \u001b[0mplanets\u001b[0m \u001b[1;33m=\u001b[0m \u001b[0mload\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;34m'de421.bsp'\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m\u001b[0;32m      2\u001b[0m \u001b[0mearth\u001b[0m\u001b[1;33m,\u001b[0m \u001b[0mmars\u001b[0m \u001b[1;33m=\u001b[0m \u001b[0mplanets\u001b[0m\u001b[1;33m[\u001b[0m\u001b[1;34m'earth'\u001b[0m\u001b[1;33m]\u001b[0m\u001b[1;33m,\u001b[0m \u001b[0mplanets\u001b[0m\u001b[1;33m[\u001b[0m\u001b[1;34m'mars'\u001b[0m\u001b[1;33m]\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m      3\u001b[0m \u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m      4\u001b[0m \u001b[0mjd\u001b[0m \u001b[1;33m=\u001b[0m \u001b[0mnow\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m      5\u001b[0m \u001b[0mposition\u001b[0m \u001b[1;33m=\u001b[0m \u001b[0mearth\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0mat\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0mjd\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0mobserve\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0mmars\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n",
      "\u001b[1;32mC:\\Miniconda\\envs\\skyfield_env\\lib\\site-packages\\skyfield\\iokit.py\u001b[0m in \u001b[0;36mload\u001b[1;34m(filename, autodownload, verbose)\u001b[0m\n\u001b[0;32m     37\u001b[0m                           \u001b[1;34m' be found in the current directory'\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m     38\u001b[0m                           .format(filename))\n\u001b[1;32m---> 39\u001b[1;33m         \u001b[0mdownload\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0murl\u001b[0m\u001b[1;33m,\u001b[0m \u001b[0mverbose\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m\u001b[0;32m     40\u001b[0m     \u001b[1;32mreturn\u001b[0m \u001b[0mopen\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0mfilename\u001b[0m\u001b[1;33m)\u001b[0m \u001b[1;32mif\u001b[0m \u001b[1;33m(\u001b[0m\u001b[0mcls\u001b[0m \u001b[1;32mis\u001b[0m \u001b[1;32mNone\u001b[0m\u001b[1;33m)\u001b[0m \u001b[1;32melse\u001b[0m \u001b[0mcls\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0mfilename\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m     41\u001b[0m \u001b[1;33m\u001b[0m\u001b[0m\n",
      "\u001b[1;32mC:\\Miniconda\\envs\\skyfield_env\\lib\\site-packages\\skyfield\\iokit.py\u001b[0m in \u001b[0;36mdownload\u001b[1;34m(url, verbose, blocksize)\u001b[0m\n\u001b[0;32m     84\u001b[0m                     \u001b[0mbar\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0mreport\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0mlength\u001b[0m\u001b[1;33m,\u001b[0m \u001b[0mcontent_length\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m     85\u001b[0m             \u001b[0mw\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0mflush\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[1;32m---> 86\u001b[1;33m             \u001b[0mos\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0mrename\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0mtempname\u001b[0m\u001b[1;33m,\u001b[0m \u001b[0mfilename\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m\u001b[0;32m     87\u001b[0m         \u001b[1;32mexcept\u001b[0m \u001b[0mKeyboardInterrupt\u001b[0m\u001b[1;33m:\u001b[0m\u001b[1;31m# Exception as e:\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m     88\u001b[0m             \u001b[1;32mraise\u001b[0m \u001b[0mIOError\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;34m'error getting {0} - {1}'\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0mformat\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0murl\u001b[0m\u001b[1;33m,\u001b[0m \u001b[0me\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n",
      "\u001b[1;31mPermissionError\u001b[0m: [WinError 32] The process cannot access the file because it is being used by another process: 'de421.bsp.download' -> 'de421.bsp'"
     ]
    }
   ],
   "source": [
    "planets = load('de421.bsp')\n",
    "earth, mars = planets['earth'], planets['mars']\n",
    "\n",
    "jd = now()\n",
    "position = earth.at(jd).observe(mars)\n",
    "ra, dec, distance = position.radec()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "print(ra)\n",
    "print(dec)\n",
    "print(distance)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Cant rename with the handle open"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "ename": "PermissionError",
     "evalue": "[WinError 32] The process cannot access the file because it is being used by another process: 'D:\\\\Temp\\\\test_tmp.txt' -> 'D:\\\\Temp\\\\test.txt'",
     "output_type": "error",
     "traceback": [
      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[1;31mPermissionError\u001b[0m                           Traceback (most recent call last)",
      "\u001b[1;32m<ipython-input-4-78cf09e4d2b4>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m()\u001b[0m\n\u001b[0;32m      7\u001b[0m     \u001b[0mw\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0mflush\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m      8\u001b[0m \u001b[1;33m\u001b[0m\u001b[0m\n\u001b[1;32m----> 9\u001b[1;33m     \u001b[0mos\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0mrename\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0mtempname\u001b[0m\u001b[1;33m,\u001b[0m \u001b[0mfilename\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[1;31mPermissionError\u001b[0m: [WinError 32] The process cannot access the file because it is being used by another process: 'D:\\\\Temp\\\\test_tmp.txt' -> 'D:\\\\Temp\\\\test.txt'"
     ]
    }
   ],
   "source": [
    "tempname = r'D:\\Temp\\test_tmp.txt'\n",
    "filename = r'D:\\Temp\\test.txt'\n",
    "\n",
    "with open(tempname, 'ab') as w:\n",
    "    \n",
    "    w.write(b'Hello')    \n",
    "    w.flush()\n",
    "    \n",
    "    os.rename(tempname, filename)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Can rename with the handle released"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "tempname = r'D:\\Temp\\test_tmp.txt'\n",
    "filename = r'D:\\Temp\\test.txt'\n",
    "\n",
    "with open(tempname, 'ab') as w:\n",
    "    \n",
    "    w.write(b'Hello')    \n",
    "    w.flush()\n",
    "    \n",
    "os.rename(tempname, filename)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": []
  }
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