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feat: add examples for asynchronous usage (callback, asycio) #324

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56b3969
feat: add examples for asynchronous usage (callback, asycio)
tomplus Aug 18, 2017
d457307
fix: pep8
tomplus Aug 19, 2017
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38 changes: 38 additions & 0 deletions examples/async.py
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Original file line number Diff line number Diff line change
@@ -0,0 +1,38 @@
import asyncio
import functools

from kubernetes import client, config


# return a callback and assigned future where data will be stored
def create_async_callback():
def set_result(loop, future, data):
loop.call_soon_threadsafe(future.set_result, data)
future = asyncio.Future()
return functools.partial(
set_result, asyncio.get_event_loop(), future), future


async def main():

# Configs can be set in Configuration class directly or using helper
# utility
config.load_kube_config()

v1 = client.CoreV1Api()
print("Listing pods with their IPs:")

callback, future = create_async_callback()
v1.list_pod_for_all_namespaces(watch=False, callback=callback)
ret = await future
for i in ret.items:
print(
"%s\t%s\t%s" %
(i.status.pod_ip,
i.metadata.namespace,
i.metadata.name))


if __name__ == "__main__":
loop = asyncio.get_event_loop()
loop.run_until_complete(main())
25 changes: 25 additions & 0 deletions examples/callbacks.py
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import time

from kubernetes import client, config


def recv_namespace(data):
print("Listing pods with their IPs:")
for i in data.items:
print(
"%s\t%s\t%s" %
(i.status.pod_ip,
i.metadata.namespace,
i.metadata.name))


# Configs can be set in Configuration class directly or using helper utility
config.load_kube_config()

v1 = client.CoreV1Api()
thread = v1.list_pod_for_all_namespaces(watch=False, callback=recv_namespace)

# do something in the main thread
for i in range(0, 10):
print('-- do something --')
time.sleep(0.5)