database/opxrd: Fixed order in checking for database exists

Author: Somerandomguy10111

opxrd/database/opxrd.py

@@ -10,13 +10,17 @@
 class OpXRD(PatternDB):
     @classmethod
     def load(cls, root_dirpath : str, download : bool = True, *args, **kwargs) -> PatternDB:
+        root_dirpath = os.path.expanduser(root_dirpath)
+        root_dirpath = os.path.abspath(root_dirpath)
+
+        if os.path.isdir(root_dirpath) and download:
+            raise ValueError(f'Cannot download to existing directory {root_dirpath}')
+
         if not os.path.isdir(root_dirpath) and download:
             tmp_fpath = tempfile.mktemp(suffix='.zip')
             OpXRD._download_zenodo_opxrd(output_fpath=tmp_fpath)
             OpXRD._unzip_file(tmp_fpath, output_dir=root_dirpath)
 
-        if os.path.isdir(root_dirpath) and download:
-            raise ValueError(f'Cannot download to existing directory {root_dirpath}')
 
         print(f'- Loading patterns from local files')
         return super().load(dirpath=root_dirpath)

opxrd/usage.ipynb

@@ -0,0 +1,56 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "initial_id",
+   "metadata": {
+    "collapsed": true,
+    "is_executing": true,
+    "ExecuteTime": {
+     "start_time": "2024-12-03T23:07:11.865624Z"
+    }
+   },
+   "outputs": [],
+   "source": [
+    "from opxrd import OpXRD\n",
+    "\n",
+    "opxrd = OpXRD.load(root_dirpath='/tmp/opxrd')\n",
+    "opxrd.plot_quantity(attr='spacegroup')"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "outputs": [],
+   "source": [
+    "pattern = opxrd.patterns[0]\n",
+    "pattern.plot(title='Example pattern', save_fpath=)"
+   ],
+   "metadata": {
+    "collapsed": false
+   },
+   "id": "f3f5065b29df5401"
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 2
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython2",
+   "version": "2.7.6"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}