Welcome to PyTango documentation!
PyTango is a python module that exposes to Python
the complete Tango C++ API.
This means that you can write not only tango applications (scripts, CLIs, GUIs)
that access tango device servers but also tango device servers themselves, all
of this in pure python.
# ----------------- server ------------------
import time
from PyTango.server import server_run
from PyTango.server import Device, DeviceMeta
from PyTango.server import attribute, command
class Clock(Device):
__metaclass__ = DeviceMeta
time = attribute()
def read_time(self):
return time.time()
@command(dtype_in=str, dtype_out=str)
def strftime(self, tformat):
return time.strftime(tformat)
if __name__ == "__main__":
server_run((Clock,))
|
$ # ---------------- client -----------------
$ python
>>> from PyTango import DeviceProxy
>>> clock = DeviceProxy("my/first/clock")
>>> clock.time
1384447223.774121
>>> clock.read_attribute("time").value
1384447252.037578
>>> clock.strftime("%H:%M:%S")
'17:41:50'
>>> clock.command_inout("strftime",
... "%H:%M:%S")
'17:43:12'
>>> clock.status()
'The device is in UNKNOWN state.'
|
>>> # ---------- gevent client -----------
>>> from PyTango.gevent import DeviceProxy
>>> dev = DeviceProxy("sys/tg_test/1")
>>> dev.get_green_mode()
PyTango.GreenMode.Gevent
>>> # Synchronous but green!
>>> print(dev.state())
RUNNING
>>> # Asynchronous
>>> res = dev.state(wait=False)
>>> print(res)
<gevent.event.AsyncResult at 0x1a74050>
>>> print(res.get())
RUNNING
>>> # Synchronous, but green!
>>> print(dev.long_scalar)
832
>>> # Asynchronous
>>> res = dev.read_attribute("long_scalar",
... wait=False)
>>> print(res)
<gevent.event.AsyncResult at 0x1a9f54>
>>> print(res.get())
126
|
>>> # ----- concurrent.futures client -----
>>> from PyTango.futures import DeviceProxy
>>> dev = DeviceProxy("sys/tg_test/1")
>>> dev.get_green_mode()
PyTango.GreenMode.Futures
>>> # Synchronous
>>> print(dev.state())
RUNNING
>>> # Asynchronous
>>> res = dev.state(wait=False)
>>> print(res)
<Future at 0x34a9e51 state=pending>
>>> print(res.result())
RUNNING
>>> # Synchronous
>>> print(dev.long_scalar)
832
>>> # Asynchronous
>>> res = dev.read_attribute("long_scalar",
... wait=False)
>>> print(res)
<Future at 0x5d8a17b state=pending>
>>> print(res.result())
126
|
Check out the getting started guide
to learn how to build and/or install PyTango and after that the quick tour
can help you with the first steps in the PyTango world.
If you need help understanding what Tango itself really is, you can check the
Tango
homepage where you will find plenty of documentation, FAQ and tutorials.
