intent = tracker.latest_message["intent"].get("name")
user_type = next(tracker.get_latest_entity_values("user_type"), None)
is_new_user = intent == "how_to_get_started" and user_type == "new"
if intent == "affirm" or is_new_user:
return [SlotSet("onboarding", True)]
elif intent == "deny":
return [SlotSet("onboarding", False)]
return []
在上面的代码中，如何理解这一行：
is_new_user = intent == "how_to_get_started" and user_type == "new"
它的意思是：
if "intent == "how_to_get_started" and user_type == "new" "，这将返回True或False，然后将此布尔值分配给'is_new_user'。是吗？
答案 0 :(得分：1)
括号在这里：
File "/data/yarn/local/usercache/svc-oozie-workflows/appcache/application_1563419829374_2193/container_e466_1563419829374_2193_01_000001/pyspark.zip/pyspark/cloudpickle.py", line 235, in dump
return Pickler.dump(self, obj)
File "/opt/anaconda3/envs/ds_env_v1.0/lib/python3.6/pickle.py", line 409, in dump
self.save(obj)
File "/opt/anaconda3/envs/ds_env_v1.0/lib/python3.6/pickle.py", line 476, in save
f(self, obj) # Call unbound method with explicit self
File "/opt/anaconda3/envs/ds_env_v1.0/lib/python3.6/pickle.py", line 736, in save_tuple
save(element)
File "/opt/anaconda3/envs/ds_env_v1.0/lib/python3.6/pickle.py", line 476, in save
f(self, obj) # Call unbound method with explicit self
File "/data/yarn/local/usercache/svc-oozie-workflows/appcache/application_1563419829374_2193/container_e466_1563419829374_2193_01_000001/pyspark.zip/pyspark/cloudpickle.py", line 652, in save_instancemethod
self.save_reduce(types.MethodType, (obj.__func__, obj.__self__), obj=obj)
File "/data/yarn/local/usercache/svc-oozie-workflows/appcache/application_1563419829374_2193/container_e466_1563419829374_2193_01_000001/pyspark.zip/pyspark/cloudpickle.py", line 786, in save_reduce
save(args)
File "/opt/anaconda3/envs/ds_env_v1.0/lib/python3.6/pickle.py", line 476, in save
f(self, obj) # Call unbound method with explicit self
File "/opt/anaconda3/envs/ds_env_v1.0/lib/python3.6/pickle.py", line 736, in save_tuple
save(element)
File "/opt/anaconda3/envs/ds_env_v1.0/lib/python3.6/pickle.py", line 521, in save
self.save_reduce(obj=obj, *rv)
File "/data/yarn/local/usercache/svc-oozie-workflows/appcache/application_1563419829374_2193/container_e466_1563419829374_2193_01_000001/pyspark.zip/pyspark/cloudpickle.py", line 804, in save_reduce
save(state)
File "/opt/anaconda3/envs/ds_env_v1.0/lib/python3.6/pickle.py", line 476, in save
f(self, obj) # Call unbound method with explicit self
File "/opt/anaconda3/envs/ds_env_v1.0/lib/python3.6/pickle.py", line 821, in save_dict
self._batch_setitems(obj.items())
File "/opt/anaconda3/envs/ds_env_v1.0/lib/python3.6/pickle.py", line 847, in _batch_setitems
save(v)
File "/opt/anaconda3/envs/ds_env_v1.0/lib/python3.6/pickle.py", line 521, in save
self.save_reduce(obj=obj, *rv)
File "/data/yarn/local/usercache/svc-oozie-workflows/appcache/application_1563419829374_2193/container_e466_1563419829374_2193_01_000001/pyspark.zip/pyspark/cloudpickle.py", line 804, in save_reduce
save(state)
File "/opt/anaconda3/envs/ds_env_v1.0/lib/python3.6/pickle.py", line 476, in save
f(self, obj) # Call unbound method with explicit self
File "/opt/anaconda3/envs/ds_env_v1.0/lib/python3.6/pickle.py", line 821, in save_dict
self._batch_setitems(obj.items())
File "/opt/anaconda3/envs/ds_env_v1.0/lib/python3.6/pickle.py", line 847, in _batch_setitems
save(v)
File "/opt/anaconda3/envs/ds_env_v1.0/lib/python3.6/pickle.py", line 476, in save
f(self, obj) # Call unbound method with explicit self
File "/opt/anaconda3/envs/ds_env_v1.0/lib/python3.6/pickle.py", line 781, in save_list
self._batch_appends(obj)
File "/opt/anaconda3/envs/ds_env_v1.0/lib/python3.6/pickle.py", line 808, in _batch_appends
save(tmp[0])
File "/opt/anaconda3/envs/ds_env_v1.0/lib/python3.6/pickle.py", line 521, in save
self.save_reduce(obj=obj, *rv)
File "/data/yarn/local/usercache/svc-oozie-workflows/appcache/application_1563419829374_2193/container_e466_1563419829374_2193_01_000001/pyspark.zip/pyspark/cloudpickle.py", line 804, in save_reduce
save(state)
File "/opt/anaconda3/envs/ds_env_v1.0/lib/python3.6/pickle.py", line 476, in save
f(self, obj) # Call unbound method with explicit self
File "/opt/anaconda3/envs/ds_env_v1.0/lib/python3.6/pickle.py", line 821, in save_dict
self._batch_setitems(obj.items())
File "/opt/anaconda3/envs/ds_env_v1.0/lib/python3.6/pickle.py", line 847, in _batch_setitems
save(v)
File "/opt/anaconda3/envs/ds_env_v1.0/lib/python3.6/pickle.py", line 476, in save
f(self, obj) # Call unbound method with explicit self
File "/opt/anaconda3/envs/ds_env_v1.0/lib/python3.6/pickle.py", line 781, in save_list
self._batch_appends(obj)
File "/opt/anaconda3/envs/ds_env_v1.0/lib/python3.6/pickle.py", line 805, in _batch_appends
save(x)
File "/opt/anaconda3/envs/ds_env_v1.0/lib/python3.6/pickle.py", line 521, in save
self.save_reduce(obj=obj, *rv)
File "/data/yarn/local/usercache/svc-oozie-workflows/appcache/application_1563419829374_2193/container_e466_1563419829374_2193_01_000001/pyspark.zip/pyspark/cloudpickle.py", line 804, in save_reduce
save(state)
File "/opt/anaconda3/envs/ds_env_v1.0/lib/python3.6/pickle.py", line 476, in save
f(self, obj) # Call unbound method with explicit self
File "/opt/anaconda3/envs/ds_env_v1.0/lib/python3.6/pickle.py", line 821, in save_dict
self._batch_setitems(obj.items())
File "/opt/anaconda3/envs/ds_env_v1.0/lib/python3.6/pickle.py", line 847, in _batch_setitems
save(v)
File "/opt/anaconda3/envs/ds_env_v1.0/lib/python3.6/pickle.py", line 496, in save
rv = reduce(self.proto)
File "/data/yarn/local/usercache/svc-oozie-workflows/appcache/application_1563419829374_2193/container_e466_1563419829374_2193_01_000001/py4j-0.10.6-src.zip/py4j/java_gateway.py", line 1160, in __call__
answer, self.gateway_client, self.target_id, self.name)
File "/data/yarn/local/usercache/svc-oozie-workflows/appcache/application_1563419829374_2193/container_e466_1563419829374_2193_01_000001/pyspark.zip/pyspark/sql/utils.py", line 63, in deco
return f(*a, **kw)
File "/data/yarn/local/usercache/svc-oozie-workflows/appcache/application_1563419829374_2193/container_e466_1563419829374_2193_01_000001/py4j-0.10.6-src.zip/py4j/protocol.py", line 324, in get_return_value
format(target_id, ".", name, value))
py4j.protocol.Py4JError: An error occurred while calling o90.__getstate__. Trace:
py4j.Py4JException: Method __getstate__([]) does not exist
at py4j.reflection.ReflectionEngine.getMethod(ReflectionEngine.java:318)
at py4j.reflection.ReflectionEngine.getMethod(ReflectionEngine.java:326)
at py4j.Gateway.invoke(Gateway.java:274)
at py4j.commands.AbstractCommand.invokeMethod(AbstractCommand.java:132)
at py4j.commands.CallCommand.execute(CallCommand.java:79)
at py4j.GatewayConnection.run(GatewayConnection.java:214)
at java.lang.Thread.run(Thread.java:745)
exception in __main__
Could not serialize object: Py4JError: An error occurred while calling o90.__getstate__. Trace:
py4j.Py4JException: Method __getstate__([]) does not exist
at py4j.reflection.ReflectionEngine.getMethod(ReflectionEngine.java:318)
at py4j.reflection.ReflectionEngine.getMethod(ReflectionEngine.java:326)
at py4j.Gateway.invoke(Gateway.java:274)
at py4j.commands.AbstractCommand.invokeMethod(AbstractCommand.java:132)
at py4j.commands.CallCommand.execute(CallCommand.java:79)
at py4j.GatewayConnection.run(GatewayConnection.java:214)
at java.lang.Thread.run(Thread.java:745)```
如果我们想清楚一点，我们可以将它们分为三个语句：
is_new_user = ((intent == "how_to_get_started") and (user_type == "new"))
这是基本的布尔代数，但放入python中。 condition1 = (intent == "how_to_get_started")
condition2 = (user_type == "new")
is_new_user = (condition1 and condition2)
是布尔比较运算符，将返回==或True。之后，False的工作原理与您期望的一样：
and答案 1 :(得分：1)
是的，您是对的！
is_new_user =意图==“ how_to_get_started”和user_type ==“新”
赋值在评估最右边的项后从左到右评估。
因此，第一个最右边的部分intent == "how_to_get_started" and user_type == "new"
将被评估，然后从左开始分配，即分配给is_new_user。
现在对intent == "how_to_get_started" and user_type == "new"的求值将首先在左边即intent == "how_to_get_started"进行，如果为true，则对右边的部分求值，否则返回false。
访问here了解更多详细信息。
请参见以下示例：-
>>> import dis
>>> def foo(): var = 36 == 6*6 and 4 == 3*2
...
>>> dis.dis(foo)
1 0 LOAD_CONST 1 (36)
2 LOAD_CONST 6 (36)
4 COMPARE_OP 2 (==)
6 JUMP_IF_FALSE_OR_POP 14
8 LOAD_CONST 3 (4)
10 LOAD_CONST 7 (6)
12 COMPARE_OP 2 (==)
>> 14 STORE_FAST 0 (var)
16 LOAD_CONST 0 (None)
18 RETURN_VALUE