TinyDB

TinyDB is a small and lightweight NoSQL database framework based on simple JSON files.

Source

Official Website:

Code

Some examples to create a database and insert, delete and seach for elements.

Basics

Generate new database. If path leads to an existing file, the data is read. Otherwise a new database is created.



In [1]:

    
path = './testData.json'
from tinydb import TinyDB, where
db = TinyDB(path)

Insert some data into db.



In [2]:

    
print(db.insert({'a':1, 'b':3})) # return the elements id [1,2,..]
db.all() # returns list of dicts









    



159






    Out[2]:





[{'petal length (cm)': 1.4,
  'petal width (cm)': 0.2,
  'sepal length (cm)': 5.1,
  'sepal width (cm)': 3.5},
 {'petal length (cm)': 1.4,
  'petal width (cm)': 0.2,
  'sepal length (cm)': 4.9,
  'sepal width (cm)': 3.0},
 {'petal length (cm)': 1.3,
  'petal width (cm)': 0.2,
  'sepal length (cm)': 4.7,
  'sepal width (cm)': 3.2},
 {'petal length (cm)': 1.5,
  'petal width (cm)': 0.2,
  'sepal length (cm)': 4.6,
  'sepal width (cm)': 3.1},
 {'petal length (cm)': 1.4,
  'petal width (cm)': 0.2,
  'sepal length (cm)': 5.0,
  'sepal width (cm)': 3.6},
 {'petal length (cm)': 1.7000000000000002,
  'petal width (cm)': 0.4,
  'sepal length (cm)': 5.4,
  'sepal width (cm)': 3.9},
 {'petal length (cm)': 1.4,
  'petal width (cm)': 0.30000000000000004,
  'sepal length (cm)': 4.6,
  'sepal width (cm)': 3.4},
 {'petal length (cm)': 1.5,
  'petal width (cm)': 0.2,
  'sepal length (cm)': 5.0,
  'sepal width (cm)': 3.4},
 {'petal length (cm)': 1.4,
  'petal width (cm)': 0.2,
  'sepal length (cm)': 4.4,
  'sepal width (cm)': 2.9},
 {'petal length (cm)': 1.5,
  'petal width (cm)': 0.1,
  'sepal length (cm)': 4.9,
  'sepal width (cm)': 3.1},
 {'petal length (cm)': 1.4,
  'petal width (cm)': 0.1,
  'sepal length (cm)': 4.8,
  'sepal width (cm)': 3.0},
 {'petal length (cm)': 1.1,
  'petal width (cm)': 0.1,
  'sepal length (cm)': 4.3,
  'sepal width (cm)': 3.0},
 {'petal length (cm)': 1.2,
  'petal width (cm)': 0.2,
  'sepal length (cm)': 5.8,
  'sepal width (cm)': 4.0},
 {'petal length (cm)': 1.5,
  'petal width (cm)': 0.4,
  'sepal length (cm)': 5.7,
  'sepal width (cm)': 4.4},
 {'petal length (cm)': 1.3,
  'petal width (cm)': 0.4,
  'sepal length (cm)': 5.4,
  'sepal width (cm)': 3.9},
 {'petal length (cm)': 1.4,
  'petal width (cm)': 0.30000000000000004,
  'sepal length (cm)': 5.1,
  'sepal width (cm)': 3.5},
 {'petal length (cm)': 1.7000000000000002,
  'petal width (cm)': 0.30000000000000004,
  'sepal length (cm)': 5.7,
  'sepal width (cm)': 3.8},
 {'petal length (cm)': 1.5,
  'petal width (cm)': 0.30000000000000004,
  'sepal length (cm)': 5.1,
  'sepal width (cm)': 3.8},
 {'petal length (cm)': 1.7000000000000002,
  'petal width (cm)': 0.2,
  'sepal length (cm)': 5.4,
  'sepal width (cm)': 3.4},
 {'petal length (cm)': 1.5,
  'petal width (cm)': 0.4,
  'sepal length (cm)': 5.1,
  'sepal width (cm)': 3.7},
 {'petal length (cm)': 1.0,
  'petal width (cm)': 0.2,
  'sepal length (cm)': 4.6,
  'sepal width (cm)': 3.6},
 {'petal length (cm)': 1.7000000000000002,
  'petal width (cm)': 0.5,
  'sepal length (cm)': 5.1,
  'sepal width (cm)': 3.3},
 {'petal length (cm)': 1.9,
  'petal width (cm)': 0.2,
  'sepal length (cm)': 4.8,
  'sepal width (cm)': 3.4},
 {'petal length (cm)': 1.6,
  'petal width (cm)': 0.2,
  'sepal length (cm)': 5.0,
  'sepal width (cm)': 3.0},
 {'petal length (cm)': 1.6,
  'petal width (cm)': 0.4,
  'sepal length (cm)': 5.0,
  'sepal width (cm)': 3.4},
 {'petal length (cm)': 1.5,
  'petal width (cm)': 0.2,
  'sepal length (cm)': 5.2,
  'sepal width (cm)': 3.5},
 {'petal length (cm)': 1.4,
  'petal width (cm)': 0.2,
  'sepal length (cm)': 5.2,
  'sepal width (cm)': 3.4},
 {'petal length (cm)': 1.6,
  'petal width (cm)': 0.2,
  'sepal length (cm)': 4.7,
  'sepal width (cm)': 3.2},
 {'petal length (cm)': 1.6,
  'petal width (cm)': 0.2,
  'sepal length (cm)': 4.8,
  'sepal width (cm)': 3.1},
 {'petal length (cm)': 1.5,
  'petal width (cm)': 0.4,
  'sepal length (cm)': 5.4,
  'sepal width (cm)': 3.4},
 {'petal length (cm)': 1.5,
  'petal width (cm)': 0.1,
  'sepal length (cm)': 5.2,
  'sepal width (cm)': 4.1},
 {'petal length (cm)': 1.4,
  'petal width (cm)': 0.2,
  'sepal length (cm)': 5.5,
  'sepal width (cm)': 4.2},
 {'petal length (cm)': 1.5,
  'petal width (cm)': 0.1,
  'sepal length (cm)': 4.9,
  'sepal width (cm)': 3.1},
 {'petal length (cm)': 1.2,
  'petal width (cm)': 0.2,
  'sepal length (cm)': 5.0,
  'sepal width (cm)': 3.2},
 {'petal length (cm)': 1.3,
  'petal width (cm)': 0.2,
  'sepal length (cm)': 5.5,
  'sepal width (cm)': 3.5},
 {'petal length (cm)': 1.5,
  'petal width (cm)': 0.1,
  'sepal length (cm)': 4.9,
  'sepal width (cm)': 3.1},
 {'petal length (cm)': 1.3,
  'petal width (cm)': 0.2,
  'sepal length (cm)': 4.4,
  'sepal width (cm)': 3.0},
 {'petal length (cm)': 1.5,
  'petal width (cm)': 0.2,
  'sepal length (cm)': 5.1,
  'sepal width (cm)': 3.4},
 {'petal length (cm)': 1.3,
  'petal width (cm)': 0.30000000000000004,
  'sepal length (cm)': 5.0,
  'sepal width (cm)': 3.5},
 {'petal length (cm)': 1.3,
  'petal width (cm)': 0.30000000000000004,
  'sepal length (cm)': 4.5,
  'sepal width (cm)': 2.3},
 {'petal length (cm)': 1.3,
  'petal width (cm)': 0.2,
  'sepal length (cm)': 4.4,
  'sepal width (cm)': 3.2},
 {'petal length (cm)': 1.6,
  'petal width (cm)': 0.6000000000000001,
  'sepal length (cm)': 5.0,
  'sepal width (cm)': 3.5},
 {'petal length (cm)': 1.9,
  'petal width (cm)': 0.4,
  'sepal length (cm)': 5.1,
  'sepal width (cm)': 3.8},
 {'petal length (cm)': 1.4,
  'petal width (cm)': 0.30000000000000004,
  'sepal length (cm)': 4.8,
  'sepal width (cm)': 3.0},
 {'petal length (cm)': 1.6,
  'petal width (cm)': 0.2,
  'sepal length (cm)': 5.1,
  'sepal width (cm)': 3.8},
 {'petal length (cm)': 1.4,
  'petal width (cm)': 0.2,
  'sepal length (cm)': 4.6,
  'sepal width (cm)': 3.2},
 {'petal length (cm)': 1.5,
  'petal width (cm)': 0.2,
  'sepal length (cm)': 5.3,
  'sepal width (cm)': 3.7},
 {'petal length (cm)': 1.4,
  'petal width (cm)': 0.2,
  'sepal length (cm)': 5.0,
  'sepal width (cm)': 3.3},
 {'petal length (cm)': 4.7,
  'petal width (cm)': 1.4,
  'sepal length (cm)': 7.0,
  'sepal width (cm)': 3.2},
 {'petal length (cm)': 4.5,
  'petal width (cm)': 1.5,
  'sepal length (cm)': 6.4,
  'sepal width (cm)': 3.2},
 {'petal length (cm)': 4.9,
  'petal width (cm)': 1.5,
  'sepal length (cm)': 6.9,
  'sepal width (cm)': 3.1},
 {'petal length (cm)': 4.0,
  'petal width (cm)': 1.3,
  'sepal length (cm)': 5.5,
  'sepal width (cm)': 2.3},
 {'petal length (cm)': 4.6,
  'petal width (cm)': 1.5,
  'sepal length (cm)': 6.5,
  'sepal width (cm)': 2.8},
 {'petal length (cm)': 4.5,
  'petal width (cm)': 1.3,
  'sepal length (cm)': 5.7,
  'sepal width (cm)': 2.8},
 {'petal length (cm)': 4.7,
  'petal width (cm)': 1.6,
  'sepal length (cm)': 6.3,
  'sepal width (cm)': 3.3},
 {'petal length (cm)': 3.3,
  'petal width (cm)': 1.0,
  'sepal length (cm)': 4.9,
  'sepal width (cm)': 2.4},
 {'petal length (cm)': 4.6,
  'petal width (cm)': 1.3,
  'sepal length (cm)': 6.6,
  'sepal width (cm)': 2.9},
 {'petal length (cm)': 3.9,
  'petal width (cm)': 1.4,
  'sepal length (cm)': 5.2,
  'sepal width (cm)': 2.7},
 {'petal length (cm)': 3.5,
  'petal width (cm)': 1.0,
  'sepal length (cm)': 5.0,
  'sepal width (cm)': 2.0},
 {'petal length (cm)': 4.2,
  'petal width (cm)': 1.5,
  'sepal length (cm)': 5.9,
  'sepal width (cm)': 3.0},
 {'petal length (cm)': 4.0,
  'petal width (cm)': 1.0,
  'sepal length (cm)': 6.0,
  'sepal width (cm)': 2.2},
 {'petal length (cm)': 4.7,
  'petal width (cm)': 1.4,
  'sepal length (cm)': 6.1,
  'sepal width (cm)': 2.9},
 {'petal length (cm)': 3.6,
  'petal width (cm)': 1.3,
  'sepal length (cm)': 5.6,
  'sepal width (cm)': 2.9},
 {'petal length (cm)': 4.4,
  'petal width (cm)': 1.4,
  'sepal length (cm)': 6.7,
  'sepal width (cm)': 3.1},
 {'petal length (cm)': 4.5,
  'petal width (cm)': 1.5,
  'sepal length (cm)': 5.6,
  'sepal width (cm)': 3.0},
 {'petal length (cm)': 4.1,
  'petal width (cm)': 1.0,
  'sepal length (cm)': 5.8,
  'sepal width (cm)': 2.7},
 {'petal length (cm)': 4.5,
  'petal width (cm)': 1.5,
  'sepal length (cm)': 6.2,
  'sepal width (cm)': 2.2},
 {'petal length (cm)': 3.9,
  'petal width (cm)': 1.1,
  'sepal length (cm)': 5.6,
  'sepal width (cm)': 2.5},
 {'petal length (cm)': 4.8,
  'petal width (cm)': 1.8,
  'sepal length (cm)': 5.9,
  'sepal width (cm)': 3.2},
 {'petal length (cm)': 4.0,
  'petal width (cm)': 1.3,
  'sepal length (cm)': 6.1,
  'sepal width (cm)': 2.8},
 {'petal length (cm)': 4.9,
  'petal width (cm)': 1.5,
  'sepal length (cm)': 6.3,
  'sepal width (cm)': 2.5},
 {'petal length (cm)': 4.7,
  'petal width (cm)': 1.2,
  'sepal length (cm)': 6.1,
  'sepal width (cm)': 2.8},
 {'petal length (cm)': 4.3,
  'petal width (cm)': 1.3,
  'sepal length (cm)': 6.4,
  'sepal width (cm)': 2.9},
 {'petal length (cm)': 4.4,
  'petal width (cm)': 1.4,
  'sepal length (cm)': 6.6,
  'sepal width (cm)': 3.0},
 {'petal length (cm)': 4.8,
  'petal width (cm)': 1.4,
  'sepal length (cm)': 6.8,
  'sepal width (cm)': 2.8},
 {'petal length (cm)': 5.0,
  'petal width (cm)': 1.7000000000000002,
  'sepal length (cm)': 6.7,
  'sepal width (cm)': 3.0},
 {'petal length (cm)': 4.5,
  'petal width (cm)': 1.5,
  'sepal length (cm)': 6.0,
  'sepal width (cm)': 2.9},
 {'petal length (cm)': 3.5,
  'petal width (cm)': 1.0,
  'sepal length (cm)': 5.7,
  'sepal width (cm)': 2.6},
 {'petal length (cm)': 3.8,
  'petal width (cm)': 1.1,
  'sepal length (cm)': 5.5,
  'sepal width (cm)': 2.4},
 {'petal length (cm)': 3.7,
  'petal width (cm)': 1.0,
  'sepal length (cm)': 5.5,
  'sepal width (cm)': 2.4},
 {'petal length (cm)': 3.9,
  'petal width (cm)': 1.2,
  'sepal length (cm)': 5.8,
  'sepal width (cm)': 2.7},
 {'petal length (cm)': 5.1,
  'petal width (cm)': 1.6,
  'sepal length (cm)': 6.0,
  'sepal width (cm)': 2.7},
 {'petal length (cm)': 4.5,
  'petal width (cm)': 1.5,
  'sepal length (cm)': 5.4,
  'sepal width (cm)': 3.0},
 {'petal length (cm)': 4.5,
  'petal width (cm)': 1.6,
  'sepal length (cm)': 6.0,
  'sepal width (cm)': 3.4},
 {'petal length (cm)': 4.7,
  'petal width (cm)': 1.5,
  'sepal length (cm)': 6.7,
  'sepal width (cm)': 3.1},
 {'petal length (cm)': 4.4,
  'petal width (cm)': 1.3,
  'sepal length (cm)': 6.3,
  'sepal width (cm)': 2.3},
 {'petal length (cm)': 4.1,
  'petal width (cm)': 1.3,
  'sepal length (cm)': 5.6,
  'sepal width (cm)': 3.0},
 {'petal length (cm)': 4.0,
  'petal width (cm)': 1.3,
  'sepal length (cm)': 5.5,
  'sepal width (cm)': 2.5},
 {'petal length (cm)': 4.4,
  'petal width (cm)': 1.2,
  'sepal length (cm)': 5.5,
  'sepal width (cm)': 2.6},
 {'petal length (cm)': 4.6,
  'petal width (cm)': 1.4,
  'sepal length (cm)': 6.1,
  'sepal width (cm)': 3.0},
 {'petal length (cm)': 4.0,
  'petal width (cm)': 1.2,
  'sepal length (cm)': 5.8,
  'sepal width (cm)': 2.6},
 {'petal length (cm)': 3.3,
  'petal width (cm)': 1.0,
  'sepal length (cm)': 5.0,
  'sepal width (cm)': 2.3},
 {'petal length (cm)': 4.2,
  'petal width (cm)': 1.3,
  'sepal length (cm)': 5.6,
  'sepal width (cm)': 2.7},
 {'petal length (cm)': 4.2,
  'petal width (cm)': 1.2,
  'sepal length (cm)': 5.7,
  'sepal width (cm)': 3.0},
 {'petal length (cm)': 4.2,
  'petal width (cm)': 1.3,
  'sepal length (cm)': 5.7,
  'sepal width (cm)': 2.9},
 {'petal length (cm)': 4.3,
  'petal width (cm)': 1.3,
  'sepal length (cm)': 6.2,
  'sepal width (cm)': 2.9},
 {'petal length (cm)': 3.0,
  'petal width (cm)': 1.1,
  'sepal length (cm)': 5.1,
  'sepal width (cm)': 2.5},
 {'petal length (cm)': 4.1,
  'petal width (cm)': 1.3,
  'sepal length (cm)': 5.7,
  'sepal width (cm)': 2.8},
 {'petal length (cm)': 6.0,
  'petal width (cm)': 2.5,
  'sepal length (cm)': 6.3,
  'sepal width (cm)': 3.3},
 {'petal length (cm)': 5.1,
  'petal width (cm)': 1.9,
  'sepal length (cm)': 5.8,
  'sepal width (cm)': 2.7},
 {'petal length (cm)': 5.9,
  'petal width (cm)': 2.1,
  'sepal length (cm)': 7.1,
  'sepal width (cm)': 3.0},
 {'petal length (cm)': 5.6,
  'petal width (cm)': 1.8,
  'sepal length (cm)': 6.3,
  'sepal width (cm)': 2.9},
 {'petal length (cm)': 5.8,
  'petal width (cm)': 2.2,
  'sepal length (cm)': 6.5,
  'sepal width (cm)': 3.0},
 {'petal length (cm)': 6.6,
  'petal width (cm)': 2.1,
  'sepal length (cm)': 7.6,
  'sepal width (cm)': 3.0},
 {'petal length (cm)': 4.5,
  'petal width (cm)': 1.7000000000000002,
  'sepal length (cm)': 4.9,
  'sepal width (cm)': 2.5},
 {'petal length (cm)': 6.3,
  'petal width (cm)': 1.8,
  'sepal length (cm)': 7.3,
  'sepal width (cm)': 2.9},
 {'petal length (cm)': 5.8,
  'petal width (cm)': 1.8,
  'sepal length (cm)': 6.7,
  'sepal width (cm)': 2.5},
 {'petal length (cm)': 6.1,
  'petal width (cm)': 2.5,
  'sepal length (cm)': 7.2,
  'sepal width (cm)': 3.6},
 {'petal length (cm)': 5.1,
  'petal width (cm)': 2.0,
  'sepal length (cm)': 6.5,
  'sepal width (cm)': 3.2},
 {'petal length (cm)': 5.3,
  'petal width (cm)': 1.9,
  'sepal length (cm)': 6.4,
  'sepal width (cm)': 2.7},
 {'petal length (cm)': 5.5,
  'petal width (cm)': 2.1,
  'sepal length (cm)': 6.8,
  'sepal width (cm)': 3.0},
 {'petal length (cm)': 5.0,
  'petal width (cm)': 2.0,
  'sepal length (cm)': 5.7,
  'sepal width (cm)': 2.5},
 {'petal length (cm)': 5.1,
  'petal width (cm)': 2.4,
  'sepal length (cm)': 5.8,
  'sepal width (cm)': 2.8},
 {'petal length (cm)': 5.3,
  'petal width (cm)': 2.3,
  'sepal length (cm)': 6.4,
  'sepal width (cm)': 3.2},
 {'petal length (cm)': 5.5,
  'petal width (cm)': 1.8,
  'sepal length (cm)': 6.5,
  'sepal width (cm)': 3.0},
 {'petal length (cm)': 6.7,
  'petal width (cm)': 2.2,
  'sepal length (cm)': 7.7,
  'sepal width (cm)': 3.8},
 {'petal length (cm)': 6.9,
  'petal width (cm)': 2.3,
  'sepal length (cm)': 7.7,
  'sepal width (cm)': 2.6},
 {'petal length (cm)': 5.0,
  'petal width (cm)': 1.5,
  'sepal length (cm)': 6.0,
  'sepal width (cm)': 2.2},
 {'petal length (cm)': 5.7,
  'petal width (cm)': 2.3,
  'sepal length (cm)': 6.9,
  'sepal width (cm)': 3.2},
 {'petal length (cm)': 4.9,
  'petal width (cm)': 2.0,
  'sepal length (cm)': 5.6,
  'sepal width (cm)': 2.8},
 {'petal length (cm)': 6.7,
  'petal width (cm)': 2.0,
  'sepal length (cm)': 7.7,
  'sepal width (cm)': 2.8},
 {'petal length (cm)': 4.9,
  'petal width (cm)': 1.8,
  'sepal length (cm)': 6.3,
  'sepal width (cm)': 2.7},
 {'petal length (cm)': 5.7,
  'petal width (cm)': 2.1,
  'sepal length (cm)': 6.7,
  'sepal width (cm)': 3.3},
 {'petal length (cm)': 6.0,
  'petal width (cm)': 1.8,
  'sepal length (cm)': 7.2,
  'sepal width (cm)': 3.2},
 {'petal length (cm)': 4.8,
  'petal width (cm)': 1.8,
  'sepal length (cm)': 6.2,
  'sepal width (cm)': 2.8},
 {'petal length (cm)': 4.9,
  'petal width (cm)': 1.8,
  'sepal length (cm)': 6.1,
  'sepal width (cm)': 3.0},
 {'petal length (cm)': 5.6,
  'petal width (cm)': 2.1,
  'sepal length (cm)': 6.4,
  'sepal width (cm)': 2.8},
 {'petal length (cm)': 5.8,
  'petal width (cm)': 1.6,
  'sepal length (cm)': 7.2,
  'sepal width (cm)': 3.0},
 {'petal length (cm)': 6.1,
  'petal width (cm)': 1.9,
  'sepal length (cm)': 7.4,
  'sepal width (cm)': 2.8},
 {'petal length (cm)': 6.4,
  'petal width (cm)': 2.0,
  'sepal length (cm)': 7.9,
  'sepal width (cm)': 3.8},
 {'petal length (cm)': 5.6,
  'petal width (cm)': 2.2,
  'sepal length (cm)': 6.4,
  'sepal width (cm)': 2.8},
 {'petal length (cm)': 5.1,
  'petal width (cm)': 1.5,
  'sepal length (cm)': 6.3,
  'sepal width (cm)': 2.8},
 {'petal length (cm)': 5.6,
  'petal width (cm)': 1.4,
  'sepal length (cm)': 6.1,
  'sepal width (cm)': 2.6},
 {'petal length (cm)': 6.1,
  'petal width (cm)': 2.3,
  'sepal length (cm)': 7.7,
  'sepal width (cm)': 3.0},
 {'petal length (cm)': 5.6,
  'petal width (cm)': 2.4,
  'sepal length (cm)': 6.3,
  'sepal width (cm)': 3.4},
 {'petal length (cm)': 5.5,
  'petal width (cm)': 1.8,
  'sepal length (cm)': 6.4,
  'sepal width (cm)': 3.1},
 {'petal length (cm)': 4.8,
  'petal width (cm)': 1.8,
  'sepal length (cm)': 6.0,
  'sepal width (cm)': 3.0},
 {'petal length (cm)': 5.4,
  'petal width (cm)': 2.1,
  'sepal length (cm)': 6.9,
  'sepal width (cm)': 3.1},
 {'petal length (cm)': 5.6,
  'petal width (cm)': 2.4,
  'sepal length (cm)': 6.7,
  'sepal width (cm)': 3.1},
 {'petal length (cm)': 5.1,
  'petal width (cm)': 2.3,
  'sepal length (cm)': 6.9,
  'sepal width (cm)': 3.1},
 {'petal length (cm)': 5.1,
  'petal width (cm)': 1.9,
  'sepal length (cm)': 5.8,
  'sepal width (cm)': 2.7},
 {'petal length (cm)': 5.9,
  'petal width (cm)': 2.3,
  'sepal length (cm)': 6.8,
  'sepal width (cm)': 3.2},
 {'petal length (cm)': 5.7,
  'petal width (cm)': 2.5,
  'sepal length (cm)': 6.7,
  'sepal width (cm)': 3.3},
 {'petal length (cm)': 5.2,
  'petal width (cm)': 2.3,
  'sepal length (cm)': 6.7,
  'sepal width (cm)': 3.0},
 {'petal length (cm)': 5.0,
  'petal width (cm)': 1.9,
  'sepal length (cm)': 6.3,
  'sepal width (cm)': 2.5},
 {'petal length (cm)': 5.2,
  'petal width (cm)': 2.0,
  'sepal length (cm)': 6.5,
  'sepal width (cm)': 3.0},
 {'petal length (cm)': 5.4,
  'petal width (cm)': 2.3,
  'sepal length (cm)': 6.2,
  'sepal width (cm)': 3.4},
 {'petal length (cm)': 5.1,
  'petal width (cm)': 1.8,
  'sepal length (cm)': 5.9,
  'sepal width (cm)': 3.0},
 {'petal length (cm)': 1.5,
  'petal width (cm)': 0.2,
  'sepal length (cm)': 5.4,
  'sepal width (cm)': 3.7},
 {'petal length (cm)': 1.6,
  'petal width (cm)': 0.2,
  'sepal length (cm)': 4.8,
  'sepal width (cm)': 3.4},
 {'field': {'name': {'first_name': 'John', 'last_name': 'Doe'}}},
 {'field': {'name': {'first_name': 'John', 'last_name': 'Doe'}}},
 {'field': {'name': {'first_name': 'John', 'last_name': 'Doe'}}},
 {'field': {'name': {'first_name': 'John', 'last_name': 'Doe'}}},
 {'field': [{'val': 1}, {'val': 2}, {'val': 3}]},
 {'a': 1, 'b': 3}]

Fill with some data (iris).



In [3]:

    
db.purge()

from sklearn import datasets
iris = datasets.load_iris()
data = iris.data
keys = iris.feature_names
print('== data ==\n', data[:5], '\n ...')
print('== keys ==\n', keys)









    



== data ==
 [[ 5.1  3.5  1.4  0.2]
 [ 4.9  3.   1.4  0.2]
 [ 4.7  3.2  1.3  0.2]
 [ 4.6  3.1  1.5  0.2]
 [ 5.   3.6  1.4  0.2]] 
 ...
== keys ==
 ['sepal length (cm)', 'sepal width (cm)', 'petal length (cm)', 'petal width (cm)']



In [4]:

    
if(0 == len(db)):
    for d in data:
        db.insert({
            keys[0]: d[0],
            keys[1]: d[1],
            keys[2]: d[2],
            keys[3]: d[3]
        })
# or
# db.insert_multiple([ {}, {}, ...]) # returns list of ids
db.search(where(keys[0]) >= 7.6 and where(keys[1]) >= 4.2)









    Out[4]:





[{'petal length (cm)': 1.5,
  'petal width (cm)': 0.4,
  'sepal length (cm)': 5.7,
  'sepal width (cm)': 4.4},
 {'petal length (cm)': 1.4,
  'petal width (cm)': 0.2,
  'sepal length (cm)': 5.5,
  'sepal width (cm)': 4.2}]

Error Handling



In [5]:

    
try:
    r = db.search(where(keys[0]) > 1000)[0]
    print(r)
except:
    print('Not in db.')









    



Not in db.



In [6]:

    
r = db.get(where(keys[0]) > 1000)
if not r:
    print('Not in db.') # r is None









    



Not in db.

If the actual data is irrelevant, to check for the existance of an element, use contains or count.



In [7]:

    
db.contains(where(keys[2]) == 1)









    Out[7]:





True



In [8]:

    
db.count(where(keys[2]) == 1)









    Out[8]:





1

IDs



In [9]:

    
elem = db.get(where(keys[2]) == 1)
elem.eid









    Out[9]:





23



In [10]:

    
if db.contains(eids=[11, 12]):
    e1 = db.get(eid=11)
    e2 = db.get(eid=12)
    db.remove(eids=[11, 12])
    db.insert_multiple([e1, e2])

print(len(db))    
# db.remove(eids=list(arange(70, 75)))
# print(len(db))

Regex and nested queries



In [11]:

    
# db.remove(where('field').has('name').has('last_name') == 'Doe')
db.insert({'field': {'name': {'first_name': 'John', 'last_name': 'Doe'}}})
# print(db.search(where('field.name.last_name') == 'Doe'))
# print(db.search(where('field.name.last_name').matches('[0-9]*')),'\n')

db.remove(where('field').any(where('val') == 1))
db.insert({'field': [{'val': 1}, {'val': 2}, {'val': 3}]})
print(db.search(where('field').any(where('val') == 1)))









    



[{'field': [{'val': 1}, {'val': 2}, {'val': 3}]}]