因为在这个程序当中你没有定义line这个变量啊
2. NameError: name 'xxx' is not defined 某个变量没有定义就去使用它。 for i in range(1, 6): s = s + i # 变量s没有定义,在for语句之前定义它可以解决 print( s) 3. SyntaxError: invalid character ')' (U+FF09) 一般是在语句中使用了中文输入的符号,比如括号,逗号,冒号,单引号,双引号等...
It is not yet clear how much more effective airline security has become—but thelinesare obvious. 出自-2017年考研阅读原文 First two hours , now three hours—this is how far in advance authorities are recommending people show up to catch a domestic flight , at least at some major U.airports...
This property is not relevant if the element was not created through a template. (Inherited from FrameworkElement) ToolTip Gets or sets the tool-tip object that is displayed for this element in the user interface (UI). (Inherited from FrameworkElement) TouchesCaptured Gets all touch devices...
The line that connects the points in this example is not a standard Polyline element but instead a custom Shape derivative named CanonicalSpline. (The canonical spline—also known as the cardinal spline—is part of Windows Forms but did not make it into the WPF. Every pair of points is conn...
, that are not supported by the service provider. If the address is not allowed, the specified address is either not assigned to the specified line or is not valid for address redirection. LINEERR_INVALADDRESSID = 0x80000011 The specified address identifier is either invalid or out of range...
NameError: name 'a' is not defined 1. 2. 3. 4. 5. NameError 名称错误 原因及解决方案: 先给a赋值,才能使用它。当出现NameError时,绝大多数情况不是没被赋值,而是我们将单词拼错,或大小写没注意到。因此要回头好好检查下哪里错了。 SyntaxErrorError ...
老师用的jdk应该是1.6或1.7的，在这个jdk版本中用println的确正确，但1.8后就不行了。具体是什么原因，猜测是println方法在1.8后没有了。我了解的只到这。哈哈，更深入的，还是恭迎后边的大神吧！！
The-pflag is used to specify the Windows Terminal profile that should be opened. Substitute "Ubuntu-18.04" with the name of any terminal profile that you have installed. This will always open a new window. Windows Terminal is not yet capable of opening new tabs or panes in an existing inst...
package www.google.cn;import javax.script.ScriptEngine;import javax.script.ScriptEngineManager;import javax.script.ScriptException;public class demo1 { public static void main(String[] args) throws ScriptException { ScriptEngineManager sem=new ScriptEngineManager(); ScriptEngine engine...