initial creation

py3interm/EXAMPLES/mongodb_example.py

@@ -0,0 +1,85 @@
+#!/usr/bin/env python
+import re
+from pymongo import MongoClient, errors
+
+FIELD_NAMES = (
+    'termnumber lastname firstname '
+    'birthdate '
+    'deathdate birthplace birthstate '
+    'termstartdate '
+    'termenddate '
+    'party'
+).split()  # <1>
+
+mc = MongoClient()  # <2>
+
+try:
+    mc.drop_database("presidents")  # <3>
+except errors.PyMongoError as err:
+    print(err)
+
+db = mc["presidents"]  # <4>
+
+coll = db.presidents  # <5>
+
+with open('../DATA/presidents.txt') as presidents_in:  # <6>
+    for line in presidents_in:
+        flds = line[:-1].split(':')
+        kvpairs = zip(FIELD_NAMES, flds)
+        record_dict = dict(kvpairs)
+        coll.insert_one(record_dict)  # <7>
+
+print(db.list_collection_names())  # <8>
+print()
+
+abe = coll.find_one({'termnumber': '16'})  # <9>
+print(abe, '\n')
+
+for field in FIELD_NAMES:
+    print("{0:15s} {1}".format(field.upper(), abe[field]))  # <10>
+
+print('-' * 50)
+
+for president in coll.find():  # <11>
+    print("{0[firstname]:25s} {0[lastname]:30s}".format(president))
+print('-' * 50)
+
+rx_lastname = re.compile('^roo', re.IGNORECASE)
+for president in coll.find({'lastname': rx_lastname}):  # <12>
+    print("{0[firstname]:25s} {0[lastname]:30s}".format(president))
+print('-' * 50)
+
+for president in coll.find({"birthstate": 'Virginia'}):  # <13>
+    print("{0[firstname]:25s} {0[lastname]:30s}".format(president))
+
+print('-' * 50)
+print("removing Millard Fillmore")
+result = coll.delete_one({'lastname': 'Fillmore'})  # <14>
+print(result)
+result = coll.delete_one({'lastname': 'Roosevelt'})  # <14>
+print(result)
+print('-' * 50)
+
+
+result = coll.delete_one({'lastname': 'Bush'})
+print(dir(result))
+print()
+
+result = coll.count_documents({})  # <15>
+print(result)
+
+
+for president in coll.find():  # <11>
+    print("{0[firstname]:25s} {0[lastname]:30s}".format(president))
+print('-' * 50)
+
+animals = db.animals
+
+print(animals, '\n')
+
+animals.insert_one({'name': 'wombat', 'country': 'Australia'})
+animals.insert_one({'name': 'ocelot', 'country': 'Mexico'})
+animals.insert_one({'name': 'honey badger', 'country': 'Iran'})
+
+for doc in animals.find():
+    print(doc['name'])