我必须在python中编写一个简单的tcp转发器，它将永远运行。我将以1分钟的间隔获取数据。那么我必须在socket.read()中运行while true吗？
有没有更好的方法来避免所有那些不必要的cpu周期？
还有一件事，socket.read（）在一个线程中。
答案 0 :(得分：2)
我必须在true中运行socket.read（）吗？有没有更好的方法来避免所有那些不必要的cpu循环？
这是阻止@extends('layouts.app')
@section('content')
<div class="container">
<div class="row">
<div class="col-md-8 col-md-offset-2">
<div class="panel panel-default">
<div class="panel-heading text-center">Add New Machine</div>
<div class="panel-body">
<form class="form-horizontal" method="POST" action="{{ route('addMachine') }}">
{{ csrf_field() }}
<div class="form-group{{ $errors->has('name') ? ' has-error' : '' }}">
<label for="name" class="col-md-4 control-label">Name</label>
<div class="col-md-6">
<input id="name" type="text" class="form-control" name="name" value="{{ old('name') }}" required autofocus>
@if ($errors->has('name'))
<span class="help-block">
<strong>{{ $errors->first('name') }}</strong>
</span>
@endif
</div>
</div>
<div class="form-group{{ $errors->has('part_id') ? ' has-error' : '' }}">
<label for="part_id" class="col-md-4 control-label">Part Id#</label>
<div class="col-md-6">
<input class="typeahead form-control" autocomplete="off" type="text" id="part_id" name="part_id" value="{{ old('part_id') }}">
@if ($errors->has('part_id'))
<span class="help-block">
<strong>{{ $errors->first('part_id') }}</strong>
</span>
@endif
</div>
</div>
<div class="form-group">
<label for="department_id" class="col-md-4 control-label">Department</label>
<div class="col-md-6">
<p style="margin-top: 7px;">
<select name="department_id" id="department_id" type="department_id">
<?php
foreach ($departments as $department) {
echo "<option value=".$department['id'].">".$department['name']."</option>";
}
?>
</select>
</div>
</div>
<div class="form-group">
<label for="type_id" class="col-md-4 control-label">Machine Type</label>
<div class="col-md-6">
<p style="margin-top: 7px;">
<select name="type_id" id="type_id" type="type_id">
<?php
foreach ($types as $type) {
echo "<option value=".$type['id'].">".$type['name']."</option>";
}
?>
</select>
</div>
</div>
<div class="form-group">
<label for="production_status_id" class="col-md-4 control-label">Production Status</label>
<div class="col-md-6">
<p style="margin-top: 7px;">
<select name="production_status_id" id="production_status_id" type="production_status_id">
<?php
foreach ($productionStatuses as $productionStatus) {
echo "<option value=".$productionStatus['id'].">".$productionStatus['name']."</option>";
}
?>
</select>
</div>
</div>
<div class="form-group">
<div class="col-md-6 col-md-offset-4">
<button type="submit" class="btn btn-primary">
Add Machine
</button>
</div>
</div>
</form>
</div>
</div>
</div>
</div>
</div>
@endsection
@section('scripts')
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-3-typeahead/4.0.2/bootstrap3-typeahead.min.js"></script>
<script type="text/javascript">
var autocompletePartPath = "{{ route('autocompletePart') }}";
$('#part_id').typeahead( {
source: function (query, process) {
return $.get(autocompletePartPath, { query: query }, function (data) {
return process(data);
});
},
displayText: function (item) {
return `${item.id} - ${item.name} ${item.revision}`;
},
afterSelect: function (item) {
$('#part_id').val(item.id);
},
fitToElement: true
});
</script>
@endsection
。因此，您的进程（线程）在等待下一次网络通信时基本上处于休眠状态，而不是消耗CPU周期。
答案 1 :(得分：0)
在一天结束时，你仍然需要某种真实。通常的做法是在某个地方睡觉。
如果需要从多个套接字读取，则需要使用select函数。 https://docs.python.org/3/library/select.html。这是因为read（）操作可能会阻塞。