UnboundLocalError: cannot access local variable 'file' where it is not associated with a value 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. UnboundLocalError异常是NameError异常的子类,异常信息提示没有找到 file 变量,这是因为 open(filename) 6.2 else 代码块 与while 和 for 循环类型,try 语句也可以带...
SystemExit Raised by the sys.exit() function. TypeError Raised when a function or operation is applied to an object of an incorrect type. UnboundLocalError Raised when a reference is made to a local variable in a function or method, but no value has been bound to that variable. UnicodeError...
if：如果2、else：否则十二、运算符与随机数1、module：模块2、sys(system)：系统3、path：路径4、imp...
""" Main Lambda handler function Parameters: event: Dict containing the Lambda function event data context: Lambda runtime context Returns: Dict containing status message """try:# Parse the input eventorder_id = event['Order_id'] amount = event['Amount'] item = event['Item']# Access ...
可以看到,调用函数add_money后抛出错误UnboundLocalError.根据报错信息,局部变量(local variable)money在赋值前被引用。那么,什么是局部变量?这个错误是如何产生的? 1. 局部变量与全局变量 在Python中,如果变量名出现在赋值运算(=)的左侧,那么就定义了一个变量。例如: ...
function_a中的变量local_a和module level的变量global_a就在不同的命名空间中,所以print(local_a)会报错。 要想使得local_a可以在函数外部被访问到,只需要加一行代码: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 global_a="I am in global scope"deffunction_a():global local_a ...
However, sys.breakpointhook() can be set to some other function and breakpoint() will automatically call that, allowing you to drop into the debugger of choice. New in version 3.7. (二).大意 这个函数会使你进入调试模式。具体来说,它调用sys.breakpointhook(),直接传递args和kws。
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obj_count = 0 # Class variable function __init__(::PyObject) ObjectCounter.obj_count += 1 end end GUI Event Loops For Python packages that have a graphical user interface (GUI), notably plotting packages like matplotlib (or MayaVi or Chaco), it is convenient to start the GUI event loo...
E0602(undefined-variable) 原因分析:未定义变量 处理意见:需处理 E0401(import-error) 原因分析:对于函数内部添加路径再import的操作,静态检查会报无法导入 处理意见:考虑修改为__import__ E0102(function-redefined) 原因分析:有可能是import *引入的问题 ...