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Is there a TRY CATCH command in Bash

I'm writing a shell script and need to check that a terminal app has been installed. I want to use a TRY/CATCH command to do this unless there is a neater way. ...
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How do I write good/correct package __init__.py files

...s.python.org/tutorial/modules.html#importing-from-a-package using __all__ and import * is redundant, only __all__ is needed I think one of the most powerful reasons to use import * in an __init__.py to import packages is to be able to refactor a script that has grown into multiple scripts without ...
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How to run functions in parallel?

I researched first and couldn't find an answer to my question. I am trying to run multiple functions in parallel in Python. ...
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Python Process Pool non-daemonic?

...s creates the worker processes in its __init__ method, makes them daemonic and starts them, and it is not possible to re-set their daemon attribute to False before they are started (and afterwards it's not allowed anymore). But you can create your own sub-class of multiprocesing.pool.Pool (multiproc...
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Bidirectional 1 to 1 Dictionary in C#

...neToOne<T, S> which is guaranteed to only contain one of each value and key (up to RefEquals anyway), and which can be searched using either key or value. Anyone know of one, or should I just implement it myself? I can't believe that I'm the first person to need this... ...
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Get name of current script in Python

...less there. It is set by the import implementation, so if you use a non-standard import mechanism it might also be unset. – Sven Marnach May 3 '13 at 19:18 8 ...
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Using logging in multiple modules

...logging logger = logging.getLogger(__name__) near the top of the module, and then in other code in the module do e.g. logger.debug('My message with %s', 'variable data') If you need to subdivide logging activity inside a module, use e.g. loggerA = logging.getLogger(__name__ + '.A') loggerB = l...
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What do commas and spaces in multiple classes mean in CSS?

Here is an example that I do not understand: 9 Answers 9 ...
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When to use Comparable and Comparator

...thought I wrote a new class that implements Comparator, that does the task and it works. 19 Answers ...
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Why do we use __init__ in Python classes?

I am having trouble understanding the Initialization of classes. 8 Answers 8 ...