with-statement

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Closing files in Python

In this discussion about the easiest way to run a process and discard its output, I suggested the following code:[详细]

2023-02-15 08:25 分类：问答
Python Conditional "With" Lock Design

I am trying to do some shared locking using with statements def someMethod(self, hasLock = False): with self.my_lock:[详细]

2023-02-14 12:09 分类：问答
pass argument to __enter__

Just learning about with statements espec开发者_运维问答ially from this article question is, can I pass an argument to __enter__?[详细]

2023-02-13 11:52 分类：问答
Object becomes None when using a context manager

Why doesn`t this work: class X: var1 开发者_高级运维= 1 def __enter__(self): pass def __exit__(self, type, value, traceback): pass[详细]

2023-02-13 03:45 分类：问答
RAII in Python - automatic destruction when leaving a scope

I\'ve been trying to find RAII in Python. Resource Allocation Is Initialization is a pattern in C++ whereby[详细]

2023-02-12 05:06 分类：问答
distinct classes using `with` in Python

If you have the following class: class Foo(object): def __init__(name): self.name = name And you use it like this in a file called check_foo.py[详细]

2023-02-11 00:36 分类：问答
SQL Server/DB2: Same query returns different results?

Summary I\'m currently working on a project where I have to query against the underlying database engine for last changes of records that represents users accesses.[详细]

2023-02-09 20:34 分类：问答
Can With/End With (VB.NET) be used when IDisposable is not available?

In cases where Using can\'t be used because IDisposable is not implemented, is the following code an OK practice for With/End With? Would this cause a memory leak or would it be better to set an insta[详细]

2023-02-09 11:41 分类：问答
python: Is there a way to get the code inside the with statement

I was hoping this would work: class A: def __enter__(self, code): print code def __exit__(..): pass and then:[详细]

2023-02-09 08:41 分类：问答
Can a DB2 WITH statement be used as part of an UPDATE or MERGE?

I need to update some rows in a DB table. How I identify the rows to be updated involved a series of complicated statements, and I managed to boil them down to a series of WITH statements. Now I hav开[详细]

2023-02-07 18:15 分类：问答