所以这是非常自我解释的。
class Tray(object):
'''
A class used to collect information about each unique tray
'''
def __init__(self):
self.cycle = None
self.cell = None
self.bIsTilted = False # Assume trays are not tilted
self.bSendNoData = False # Assume data is sent, modified later if data not sent
self.trayData = (self.cycle,
self.cell,
self.bIsTilted,
self.bSendNoData)
def __repr__(self):
return str(self.trayData)
def setCycle(self, cycle):
self.cycle = cycle
def setCell(self, cell):
self.cell = cell
如果我运行以下语句：
currentTray = Tray()
currentTray.setCycle(250)
currentTray.setCell(300)
print(currentTray)
currentTray.setCell(25)
print(currentTray.cell)
我的输出是：
(None, None, False, False)
25
所以，我想我想弄清楚为什么我的self.trayData没有根据self.cycle，self.cell等中的值进行更新。这里有什么问题？
答案 0 :(得分：3)
当您执行以下操作时 -
<body>
<script>
function checkRadio() {
var selectedAge="";
var selectedBmi="";
var selectedDiabete="";
var description="";
var len = document.row.length;
var i;
function init(){
for (i = 0; i<len; i++) {
if (document.row[i].value);
break;
}
if (selectedAge == "") {
document.getElementByid("radio_error").innnerHTML = "no option selected";
return false
}
else {
document.getElementById("radio_error").innerHTML = "";
return true;
}
}
init();
}
</script>
<script>
function addNumbers()
{
var val1 = parseInt(document.querySelector('input[name = "selectedAge"]:checked').value);
var val2 = parseInt(document.querySelector('input[name = "selectedBmi"]:checked').value);
var val3 = parseInt(document.querySelector('input[name = "selectedDiabete"]:checked').value);
var val4 = parseInt(document.querySelector('input[name = "description"]:checked').value);
var ansD = document.getElementById("answer");
ansD.value = val1 + val2 + val3 + val4;
}
</script>
<script>
var myDiv=document.getElementsByTagName('div');
var allDiv=myDiv.length;
for(var i=0;i<allDiv.i++){
currentDiv=myDiv[i];
if (ansD.value<=15){
div[0].style.display = 'block';
div[1].style.display = 'none';
div[2].style.display = 'none'
} else if (ansD.value<=25){
div[0].style.display = 'none';
div[1].style.display = 'block';
div[2].style.display = 'none';
} else {ansD.value>25){
div[0].style.display = 'none';
div[1].style.display = 'none';
div[2].style.display = 'block';
}
</script>
<table>
<tr>
<th scope="col"></th>
<th scope="col">noRisk</th>
<th scope="col">lowRisk</th>
<th scope="col">mediumRisk</th>
<th scope="col">HighRisk</th>
</tr>
<tr>
<th scope="row"><div class="lefttext">How old are you?</div></th>
<td><input type="radio" id="value1" name="selectedAge" onclick="addNumber(val1)" value="0"checked>1-25</td>
<td><input type="radio" id="value1" name="selectedAge" onclick="addNumber(val1)" value="5">26-40</td>
<td><input type="radio" id="value1" name="selectedAge" onclick="addNumber(val1)" value="8">41-60</td>
<td><input type="radio" id="value1" name="selectedAge" onclick="addNumber(val1)" value="10">1-25</td>
</tr>
<tr>
<th scope="row"><div class="lefttext">What is you BMI?</div></th>
<td><input type="radio" id="value2" name="selectedBmi" onclick="addNumber(val2)" value="0" checked>0-25</td>
<td><input type="radio" id="value2" name="selectedBmi" onclick="addNumber(val2)" value="0">26-30</td>
<td><input type="radio" id="value2" name="selectedBmi" onclick="addNumber(val2)" value="9">31-35</td>
<td><input type="radio" id="value2" name="selectedBmi" onclick="addNumber(val2)" value="10">35+</td>
</tr>
<tr>
<th scope="row"><div class="lefttext">Does anybody in your family have diabetes?</div></th>
<td><input type="radio" id="value3" name="selectedDiabete" onclick="addNumber(val3)" value="0" checked>No</td>
<td><input type="radio" id="value3" name="selectedDiabete" onclick="addNumber(val3)" value="7">Grandparent</td>
<td><input type="radio" id="value3" name="selectedDiabete" onclick="addNumber(val3)" value="15">Sibling</td>
<td><input type="radio" id="value3" name="selectedDiabete" onclick="addNumber(val3)" value="15">Parent</td>
</tr>
<tr>
<th scope="row"><div class="lefttext">How would you describe your diabete</div></th>
<td><input type="radio" id="value4" name="description" onclick="addNumber(val4)" value="0" checked >Low sugar</td>
<td><input type="radio" id="value4" name="description" onclick="addNumber(val4)" value="0">Normal sugar</td>
<td><input type="radio" id="value4" name="description" onclick="addNumber(val4)" value="7">Quite high sugar</td>
<td><input type="radio" id="value4" name="description" onclick="addNumber(val4)" value="10">High sugar</td>
</tr>
</table>
<input type="button" name="submit" value="Submit" onclick="javascript:addNumbers()"/>
Total = <input type="text" id="answer" name="answer" value=""/>
<section>
<h2>Your results:</h2>
<div id="lowResult">
<p> Your results show that you currently have a low risk of
developing diabetes. However, it is important that you
maintain a healthy lifestyle in terms of diet and exercise.
</p>
</div>
<div id="mediumResult">
<p>Your results show that you currently have a medium risk of
developing diabetes. For more information on your risk
factors, and what to do about them, please visit our diabetes
advice website at <a href="http://www.zha.org.zd">http://www.zha.org.zd</a>.
<p>
</div>
<div id="highRisk">
<p>Your results show that you currently have a HIGH risk of
developing diabetes. [Your main risk factors are your BMI and
your diet.] We advise that you contact the Health Authority to
discuss your risk factors as soon as you can. Please fill in our
contact form and a member of the Health Authority Diabetes
Team will be in contact with you.
</div>
</section>
</body>
self.trayData = (self.cycle,
self.cell,
self.bIsTilted,
self.bSendNoData)
的第一个元素没有指向self.trayData（至少不是你想要它的方式），它指向对象self.cycle指向，{{1} 1}}。因此，当您将新值设置为self.cycle时，它不会自动反映在None。
让您的具体案例发挥作用的最简单方法是，在self.cycle和self.trayData方法中设置trayData。
示例 -
setCycle或者您可以将setCell定义为属性，而不是在def setCycle(self, cycle):
self.cycle = cycle
self.trayData = (self.cycle,
self.cell,
self.bIsTilted,
self.bSendNoData)
方法中定义它，示例 -
trayData然后，您可以使用__init__()使用class Tray(object):
'''
A class used to collect information about each unique tray
'''
@property
def trayData(self):
return (self.cycle, self.cell, self.bIsTilted, self.bSendNoData)
.
.
. #rest of the class.
类的对象访问trayData。
示例/演示 -
Tray().trayData答案 1 :(得分：3)
在trayData中设置__init__时，每次调用其他函数时都不会更新。将它作为返回值的类的方法更有意义：
def trayData():
return (self.cycle, self.cell, self.bIsTilted, self.bSendNoData)
答案 2 :(得分：1)
Python变量不会像您尝试的那样更新。你需要做这样的事情：
self.trayData基本上，如果您希望self.trayData拥有最新数据，则需要在更新其中的值时更新它。
现在，如果您不需要直接访问def __repr__(self):
return (self.cycle, self.cell, self.bIsTilted, self.bSendNoData)
，您可以这样做：
Error: Connection lost: The server closed the connection.
at Protocol.end (/home/user/sqlconnector/node_modules/mysql/lib/protocol/Protocol.js:103:13)
at Socket. (/home/user/sqlconnector/node_modules/mysql/lib/Connection.js:102:28)
at Socket.EventEmitter.emit (events.js:117:20)
at _stream_readable.js:920:16
at process._tickCallback (node.js:415:13)