RxPY - 实用运算符

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延迟

此运算符将根据给定的时间或日期延迟源可观测项的发射。

语法

delay(timespan)

参数

timespan：这将是秒或日期的时间。

返回值

它将返回一个可观测项，其中源值在超时后发射。

示例

from rx import of, operators as op
import datetime
test1 = of(1,2,3,4,5)
sub1 = test1.pipe(
   op.delay(5.0)
)
sub1.subscribe(lambda x: print("The value is {0}".format(x)))
input("Press any key to exit\n")

输出

E:\pyrx>python testrx.py
Press any key to exit
The value is 1
The value is 2
The value is 3
The value is 4
The value is 5

实体化

该运算符将源可观测项的值转换为以显式通知值形式发射的值。

语法

materialize()

返回值

这将返回一个可观测项，其中以显式通知值的形式发射的值。

示例

from rx import of, operators as op
import datetime
test1 = of(1,2,3,4,5)
sub1 = test1.pipe(
   op.materialize()
)
sub1.subscribe(lambda x: print("The value is {0}".format(x)))

输出

E:\pyrx>python testrx.py
The value is OnNext(1.0)
The value is OnNext(2.0)
The value is OnNext(3.0)
The value is OnNext(4.0)
The value is OnNext(5.0)
The value is OnCompleted()

时间间隔

此运算符将给出源可观测项的值之间的经过时间。

语法

time_interval()

返回值

它会返回一个可观测项，其中会有发出的源值之间的经过时间。

示例

from rx import of, operators as op
from datetime import date
test = of(1,2,3,4,5,6)
sub1 = test.pipe(
   op.time_interval()
)
sub1.subscribe(lambda x: print("The value is {0}".format(x)))

输出

E:\pyrx>python testrx.py
The value is TimeInterval(value=1, interval=datetime.timedelta(microseconds=1000
))
The value is TimeInterval(value=2, interval=datetime.timedelta(0))
The value is TimeInterval(value=3, interval=datetime.timedelta(0))
The value is TimeInterval(value=4, interval=datetime.timedelta(microseconds=1000
))
The value is TimeInterval(value=5, interval=datetime.timedelta(0))
The value is TimeInterval(value=6, interval=datetime.timedelta(0))

超时

此运算符将提供源可观测项中的所有值，在经过时间后，否则将触发一个错误。

语法

timeout(duetime)

参数

duetime：给定的秒数。

返回值

它将返回一个可观测项，其中包含源可观测项中的所有值。

示例

from rx import of, operators as op
from datetime import date
test = of(1,2,3,4,5,6)
sub1 = test.pipe(
   op.timeout(5.0)
)
sub1.subscribe(lambda x: print("The value is {0}".format(x)))

输出

E:\pyrx>python testrx.py
The value is 1
The value is 2
The value is 3
The value is 4
The value is 5
The value is 6

时间戳

此运算符将把时间戳附加到源可观测项中的所有值。

语法

timestamp()

返回值

它将返回一个可观测项，其中包含源可观测项中的所有值以及时间戳。

示例

from rx import of, operators as op
from datetime import date
test = of(1,2,3,4,5,6)
sub1 = test.pipe(
   op.timestamp()
)
sub1.subscribe(lambda x: print("The value is {0}".format(x)))

输出

E:\pyrx>python testrx.py
The value is Timestamp(value=1, timestamp=datetime.datetime(2019, 11, 4, 4, 57,
44, 667243))
The value is Timestamp(value=2, timestamp=datetime.datetime(2019, 11, 4, 4, 57,
44, 668243))
The value is Timestamp(value=3, timestamp=datetime.datetime(2019, 11, 4, 4, 57,
44, 668243))
The value is Timestamp(value=4, timestamp=datetime.datetime(2019, 11, 4, 4, 57,
44, 668243))
The value is Timestamp(value=5, timestamp=datetime.datetime(2019, 11, 4, 4, 57,
44, 669243))
The value is Timestamp(value=6, timestamp=datetime.datetime(2019, 11, 4, 4, 57,
44, 669243))