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```{eval-rst}
.. currentmodule:: tango
```
(database)=
# Working with TANGO database
Here we provide some basics, how to interact with TANGO database from Python
## Registering devices
Here is how to define devices in the Tango DataBase:
```
from tango import Database, DbDevInfo
# A reference on the DataBase
db = Database()
# The 3 devices name we want to create
# Note: these 3 devices will be served by the same DServer
new_device_name1 = "px1/tdl/mouse1"
new_device_name2 = "px1/tdl/mouse2"
new_device_name3 = "px1/tdl/mouse3"
# Define the Tango Class served by this DServer
new_device_info_mouse = DbDevInfo()
new_device_info_mouse._class = "Mouse"
new_device_info_mouse.server = "ds_Mouse/server_mouse"
# add the first device
print("Creating device: %s" % new_device_name1)
new_device_info_mouse.name = new_device_name1
db.add_device(new_device_info_mouse)
# add the next device
print("Creating device: %s" % new_device_name2)
new_device_info_mouse.name = new_device_name2
db.add_device(new_device_info_mouse)
# add the third device
print("Creating device: %s" % new_device_name3)
new_device_info_mouse.name = new_device_name3
db.add_device(new_device_info_mouse)
```
### Setting up device properties
A more complex example using python subtilities.
The following python script example (containing some functions and instructions
manipulating a Galil motor axis device server) gives an idea of how the Tango
API should be accessed from Python:
```
from tango import DeviceProxy
# connecting to the motor axis device
axis1 = DeviceProxy("microxas/motorisation/galilbox")
# Getting Device Properties
property_names = ["AxisBoxAttachement",
"AxisEncoderType",
"AxisNumber",
"CurrentAcceleration",
"CurrentAccuracy",
"CurrentBacklash",
"CurrentDeceleration",
"CurrentDirection",
"CurrentMotionAccuracy",
"CurrentOvershoot",
"CurrentRetry",
"CurrentScale",
"CurrentSpeed",
"CurrentVelocity",
"EncoderMotorRatio",
"logging_level",
"logging_target",
"UserEncoderRatio",
"UserOffset"]
axis_properties = axis1.get_property(property_names)
for prop in axis_properties.keys():
print("%s: %s" % (prop, axis_properties[prop][0]))
# Changing Properties
axis_properties["AxisBoxAttachement"] = ["microxas/motorisation/galilbox"]
axis_properties["AxisEncoderType"] = ["1"]
axis_properties["AxisNumber"] = ["6"]
axis1.put_property(axis_properties)
```
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