如何使用不同的参数并行运行相同的函数？

时间：2018-12-27 15:01:07

标签： python

我想多次运行相同的函数，每次使用多线程或多处理时都使用不同的参数。到目前为止，这是我的代码：

2018-12-28T03:52:30.610101Z     info    Version root@6f6ea1061f2b-docker.io/istio-1.0.5-c1707e45e71c75d74bf3a5dec8c7086f32f32fad-Clean
2018-12-28T03:52:30.610167Z     info    Proxy role: model.Proxy{ClusterID:"", Type:"sidecar", IPAddress:"10.233.72.142", ID:"jpetstoreweb-84c7d8964-s642k.myns", Domain:"myns.svc.cluster.local", Metadata:map[string]string(nil)}
2018-12-28T03:52:30.611217Z     info    Effective config: binaryPath: /usr/local/bin/envoy
configPath: /etc/istio/proxy
connectTimeout: 10s
discoveryAddress: istio-pilot.istio-system:15007
discoveryRefreshDelay: 1s
drainDuration: 45s
parentShutdownDuration: 60s
proxyAdminPort: 15000
serviceCluster: jpetstoreweb
zipkinAddress: zipkin.istio-system:9411

2018-12-28T03:52:30.611249Z     info    Monitored certs: []envoy.CertSource{envoy.CertSource{Directory:"/etc/certs/", Files:[]string{"cert-chain.pem", "key.pem", "root-cert.pem"}}}
2018-12-28T03:52:30.611829Z     info    Starting proxy agent
2018-12-28T03:52:30.611902Z     info    Received new config, resetting budget
2018-12-28T03:52:30.611912Z     info    Reconciling configuration (budget 10)
2018-12-28T03:52:30.611926Z     info    Epoch 0 starting
2018-12-28T03:52:30.613236Z     info    Envoy command: [-c /etc/istio/proxy/envoy-rev0.json --restart-epoch 0 --drain-time-s 45 --parent-shutdown-time-s 60 --service-cluster jpetstoreweb --service-node sidecar~10.233.72.142~jpetstoreweb-84c7d8964-s642k.myns~myns.svc.cluster.local --max-obj-name-len 189 --allow-unknown-fields -l warn --v2-config-only]
[2018-12-28 03:52:30.630][20][info][main] external/envoy/source/server/server.cc:190] initializing epoch 0 (hot restart version=10.200.16384.256.options=capacity=16384, num_slots=8209 hash=228984379728933363 size=4882536)
[2018-12-28 03:52:30.631][20][info][main] external/envoy/source/server/server.cc:192] statically linked extensions:
[2018-12-28 03:52:30.631][20][info][main] external/envoy/source/server/server.cc:194]   access_loggers: envoy.file_access_log,envoy.http_grpc_access_log
[2018-12-28 03:52:30.631][20][info][main] external/envoy/source/server/server.cc:197]   filters.http: envoy.buffer,envoy.cors,envoy.ext_authz,envoy.fault,envoy.filters.http.header_to_metadata,envoy.filters.http.jwt_authn,envoy.filters.http.rbac,envoy.grpc_http1_bridge,envoy.grpc_json_transcoder,envoy.grpc_web,envoy.gzip,envoy.health_check,envoy.http_dynamo_filter,envoy.ip_tagging,envoy.lua,envoy.rate_limit,envoy.router,envoy.squash,istio_authn,jwt-auth,mixer
[2018-12-28 03:52:30.631][20][info][main] external/envoy/source/server/server.cc:200]   filters.listener: envoy.listener.original_dst,envoy.listener.proxy_protocol,envoy.listener.tls_inspector
[2018-12-28 03:52:30.631][20][info][main] external/envoy/source/server/server.cc:203]   filters.network: envoy.client_ssl_auth,envoy.echo,envoy.ext_authz,envoy.filters.network.rbac,envoy.filters.network.thrift_proxy,envoy.http_connection_manager,envoy.mongo_proxy,envoy.ratelimit,envoy.redis_proxy,envoy.tcp_proxy,mixer
[2018-12-28 03:52:30.631][20][info][main] external/envoy/source/server/server.cc:205]   stat_sinks: envoy.dog_statsd,envoy.metrics_service,envoy.stat_sinks.hystrix,envoy.statsd
[2018-12-28 03:52:30.631][20][info][main] external/envoy/source/server/server.cc:207]   tracers: envoy.dynamic.ot,envoy.lightstep,envoy.zipkin
[2018-12-28 03:52:30.631][20][info][main] external/envoy/source/server/server.cc:210]   transport_sockets.downstream: alts,envoy.transport_sockets.capture,raw_buffer,tls
[2018-12-28 03:52:30.631][20][info][main] external/envoy/source/server/server.cc:213]   transport_sockets.upstream: alts,envoy.transport_sockets.capture,raw_buffer,tls
[2018-12-28 03:52:30.634][20][info][config] external/envoy/source/server/configuration_impl.cc:50] loading 0 static secret(s)
[2018-12-28 03:52:30.638][20][warning][upstream] external/envoy/source/common/config/grpc_mux_impl.cc:240] gRPC config stream closed: 14, no healthy upstream
[2018-12-28 03:52:30.638][20][warning][upstream] external/envoy/source/common/config/grpc_mux_impl.cc:41] Unable to establish new stream
[2018-12-28 03:52:30.638][20][info][config] external/envoy/source/server/configuration_impl.cc:60] loading 1 listener(s)
[2018-12-28 03:52:30.640][20][info][config] external/envoy/source/server/configuration_impl.cc:94] loading tracing configuration
[2018-12-28 03:52:30.640][20][info][config] external/envoy/source/server/configuration_impl.cc:103]   loading tracing driver: envoy.zipkin
[2018-12-28 03:52:30.640][20][info][config] external/envoy/source/server/configuration_impl.cc:116] loading stats sink configuration
[2018-12-28 03:52:30.640][20][info][main] external/envoy/source/server/server.cc:432] starting main dispatch loop
[2018-12-28 03:52:32.010][20][warning][upstream] external/envoy/source/common/config/grpc_mux_impl.cc:240] gRPC config stream closed: 14, no healthy upstream
[2018-12-28 03:52:32.011][20][warning][upstream] external/envoy/source/common/config/grpc_mux_impl.cc:41] Unable to establish new stream
[2018-12-28 03:52:34.691][20][warning][upstream] external/envoy/source/common/config/grpc_mux_impl.cc:240] gRPC config stream closed: 14, no healthy upstream
[2018-12-28 03:52:34.691][20][warning][upstream] external/envoy/source/common/config/grpc_mux_impl.cc:41] Unable to establish new stream
[2018-12-28 03:52:38.483][20][info][upstream] external/envoy/source/common/upstream/cluster_manager_impl.cc:130] cm init: initializing cds
[2018-12-28 03:53:01.596][20][info][upstream] external/envoy/source/common/upstream/cluster_manager_impl.cc:494] add/update cluster outbound|443||kubernetes.default.svc.cluster.local during init

预期输出： 

[2018-12-28T04:09:09.561Z] - 115 1548 6 "127.0.0.1:9080" inbound|80||jpetstoreweb-service.myns.svc.cluster.local 127.0.0.1:40318 10.233.72.142:9080 10.233.72.1:43098
[2018-12-28T04:09:14.555Z] - 115 1548 8 "127.0.0.1:9080" inbound|80||jpetstoreweb-service.myns.svc.cluster.local 127.0.0.1:40350 10.233.72.142:9080 10.233.72.1:43130
[2018-12-28T04:09:19.556Z] - 115 1548 5 "127.0.0.1:9080" inbound|80||jpetstoreweb-service.myns.svc.cluster.local 127.0.0.1:40364 10.233.72.142:9080 10.233.72.1:43144
[2018-12-28T04:09:24.558Z] - 115 1548 6 "127.0.0.1:9080" inbound|80||jpetstoreweb-service.myns.svc.cluster.local 127.0.0.1:40378 10.233.72.142:9080 10.233.72.1:43158

即import threading import time def infiniteloop1(a): while True: print(a) time.sleep(1) thread1 = threading.Thread(target=infiniteloop1('aaa')) thread1.start() thread2 = threading.Thread(target=infiniteloop1('bbb')) thread2.start() 和aaa bbb aaa bbb 的每一块将每秒同时打印一次。

实际输出： 每秒仅打印aaa

1 个答案:

答案 0 :(得分：2)

try { String sql = "select sum(billFine) from tbl_internet "; pst = con.prepareStatement(sql); rs = pst.executeQuery(); if(rs.next()) { String sum= rs.getString("sum(billFine)"); total_fine.setText(sum); } } catch (SQLException e) { e.printStackTrace(); } 不会在单独的线程上调用threading.Thread(target=infiniteloop1('aaa'))。

infiniteloop1的{​​{1}}参数应该是可调用的。相反，threading.Thread甚至在调用target之前就评估（=呼叫）infiniteloop1('aaa')，甚至从未达到infiniteloop1。

如果threading.Thread并未真正创建无限循环，您将自己发现这一点。例如，如果只是返回参数，则得到：

thread1.start

将引发错误infiniteloop1。这是因为def infiniteloop1(a): return a thread1 = threading.Thread(target=infiniteloop1('aaa')) 被评估为TypeError: 'str' object is not callable，然后被传递给 infiniteloop1('aaa')为'aaa'。


相反，请使用threading.Thread kwarg分别提供target的可调用项及其参数（并请记住，它期望可迭代，因此应将单个字符串参数作为一个传递-元组）。

threading.Thread

输出：

args
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