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1877 - Guests doing a bunk?
Hotel guests, due to check out this morning, not down from breakfast at the time they had estimated. All quiet - very quiet - on the bedroom front. Their car missing from the car park (I looked up the registration to check). Yes, I was concerned (but not overly so; as a matter of course, we have b ....

1876 - Python Regular Expressions
Python supports string pattern matching to regular expressions, using Perl style regular expressions. The re module - loaded via   import re brings the appropriate elements into your program ... ready to use. Patterns that you want to match against are called Regular Expressions and are ....

1875 - What are exceptions - Python based answer
How do you check for run time errors in your program? You'll include tests with if statements in almost every program you write, to ensure that user entered data is reasonable / as you would expect ... but you will also need to do more that that. You'll need to check whether a system function has r ....

1874 - Is it worth it?
There are times that I wonder "is it worth it ..." with some of the things that I do. The world won't crumble if I miss the blog for one day, and the forum is quiet - is it read? Is it worth it? But then ... I just look at today. Kevin and Ted are posting on the forum. And as I look across to it ....

1873 - List Comprehensions in Python
How do you perform an operation on every member of a list, producing a new list? A List Comprehension in Python is a structure in which a for loop is written within a list's square brackets. Its purpose is to allow the programmer to write short code that's used to transform each element of a source ....

1872 - Barack Obama wins US Predidency
Congratulations to Barack Obama, who has won a decisive victory in the Presidential Election in the USA. And a few words too for John McCain, who was very gracious in his speech of concession - almost the John McCain as I had seen him as the honourable maverick years ago, a John McCain that seemed ....

1871 - Optional and named parameters in Python
When you're calling a named block of code (either a function or a method in Python terms), you'll pass in a number of parameters. Some of those will be mandatory - needed every time. Some will be optional, but frequently used, and others will be wanted on very rare occasions indeed and selected f ....

1870 - What to do with a huge crop of apples
Last year, you had a good crop of apples on your tree .... what did you do with them? Make apple pies for all the neighbours! How? • You collect all the apples and bring them into the kitchen. • You prepare the apples ready for the pies. • You make the pastry and apple pies. • ....

1869 - Anonymous functions (lambdas) and map in Python
Why do you name variables? So that you can use them again later. But if you don't want to use them more than once, why bother with a name at all? Most programming languages create temporary or anonymous variables within a single line, and if you've programmed almost anything, you'll have used them w ....

1868 - Liverpool - a friendly city
I'm in Liverpool for a three day Python course - if October was the month of Perl then November looks set to be the month of Python There's a certain friendlyness about Liverpool - it's very much one of those cities where, I feel, the people make the place. A cheery checkin last night, and a frien ....

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