Hi All, I've reached the point in using Python where projects, instead of being like 'batch scripts', are becoming more like 'proper' programs.
Therefore, I'm re-designing most of these and have found things in common which I can use classes for. As I'm only just starting to get into classes, I see that new style classes are thte way to go, so will be using those. I come from a C++ background, and understand I need to adjust my thinking in certain ways - I have read http://www.geocities.com/foetsch/python/new_style_classes.htm. As a really simple class, I've decided to make a 'str' to include a 'substr' function. Yes, I know this can be done using slicing, and effectively this is what substr would do: something like; class mystr(str): """" My rather rubbish but trying to be simple custom string class """ def substr(self,start,length,pad=False): """ Return str of (up to) _length_ chars, starting at _start_ which is 1 offset based. If pad is True, ensure _length_ chars is returned by padding with trailing whitespace. """" return self.<what>[ (start-1): (start-1)+length ] Ignore the fact pad isn't implemented... <what> should be the actual string value of the string object: How do I work out what this is? Secondly, I'm not 100% sure what I need for the __init__; is str's __init__ implicitly called, or do I need to call str's __init__ in mystr's (I seem to remember seeing some code which did this, as well as calling super()). Any critiscm is appreciated. Many thanks, Jon. -- http://mail.python.org/mailman/listinfo/python-list
