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snippet

15/09/2015
Configuring Python's logging Module with argparse
This post assumes you're familiar with and using Python's logging module to log info from your script. If you don't care about how it works skip to the end to see the code for the full solution.

Goal

Our goal is to control the log level via the command line using an additional argument --log_level that takes a one of the logging module's log levels.
```
$> script.py --log_level DEBUG
```
And it would be nice if the parsed variable returned by argparse.ArgumentParser.parse_args() could be used directly as an argument to logging.Logger.setLevel.
```
parsed_args = parser.parse_args()

root_logger = logging.getLogger()
root_logger.setLevel(parsed_args.log_level)
```
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15/09/2015
Batch File Tips and Tricks
A collection of some useful snippets for batch files.

Controlling batch file output

To stop every line of the batch file being output to the command prompt put this at the top of the batch file, this makes for a less noisy output.
```
@echo off
```
Echo the output of a command, useful for logging what the batch file is actually doing.
```
for /f %%i in ('dir') do echo %%i
```
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17/12/2012

C++ template syntax

This post will cover some less common syntax that is useful when dealing with templates. The class used to demonstrate the syntax is only as an example, it is not supposed to be a good example of a working smart pointer class.

Let's start with a simple SmartPointer class and how to write template function definitions outside of the class definition:

// define the class
//
template<typename PointerType>
class SmartPointer
{
public:
  SmartPointer(PointerType *pointer);
  ~SmartPointer();

private:
  PointerType *m_pointer;
};

// define the member functions
//
template<typename PointerType>
inline SmartPointer<PointerType>::SmartPointer(PointerType *pointer)
: m_pointer(pointer)
{
  // do some stuff
}

template<typename PointerType>
inline SmartPointer<PointerType>::~SmartPointer(PointerType *pointer)
{
  // do some stuff
}

snippet

Goal

Controlling batch file output