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理解Python的 with 语句 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...具体说明with如何工作：
#!/usr/bin/env python
# with_example01.py
class Sample:
def __enter__(self):
print "In __enter__()"
return "Foo"
def __exit__(self, type, value, trace):
print "In __exit__()"
def get_sample():
return Sample()
...
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IRXmitter红外发射器扩展 · App Inventor 2 中文网
...定了不支持的值，会触发Screen.ErrorOccurred事件，错误代码17302。
启动延迟
在自动重复模式下，StartDelay定义第一个数据包和后续数据包之间的暂停时间，单位为毫秒(ms)。有效值为0..1000。默认值为500ms。如果指定了不支持的值，...