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Function Definitions Python scripts

Decorator

... defines a "decorator" that, rather than decorating the function, calls it, passing it a file object that ... makes sure to close the file upon the function's return (or nonreturn) with a try...finally block. One ... kind of gives us this effect: the decorated function acts as a code block. However, unlike try...finally, ...
Python

Farey Sequence

This function provides farey sequence, F(n), for any integer n.There's probably a more elegant solution out there, but I couldn't find it. Note: it doesn't prepend (0,1) and append (1,1)... ...
Python

Permutation

This script contains a small but efficient recursive function for printing the permutation of characters in a given string. ...
Python

A tidy property idiom

... class space by nesting them inside of a function with the same name as the property you will create. This function is then used to create your new property, at which time said function will no longer have any referrers. As such, ...
Python

catenateFilesFactory

catenateFilesFactory script generates a catenateFiles function parameterized for common variations.Catenating (or concatenating) files is ... at least three independent binary choices for the functional requirements. This could mean 8 different functions, or one functions with three additional boolean arguments.Binary files are relatively ... end with a line separator. Then the catenation function must insert a line separator between the last ...
Python

Python symbols

... that shows a way to define symbols inside functions, using a decorator. ...
Python

Readable switch construction

... popular substitute uses dictionaries to map cases to functions, which requires lots of defs or lambdas. While ... cases, it aims to duplicate C's original 'switch' functionality and structure with reasonable accuracy. ...
Python

More accurate sum

Built-in "sum" function, as well as add.reduce functions in Numeric/numarray introduce a large error when summing large arrays of like elements. This script contains a function that makes sums with error less than 1e-15. It doesn't use any additional memory (although it ...
Python

Automatic explicit file close

This script is a drop in replacement for open() function that automatically explicitly closes the file when its input is exhausted. ...
Python

Refining an FTP Site List

This script introduces a pair of functions for checking whether FTP sites are up. The refineFTPList() function will take in a list of FTP sites ... of sites that are not down. The isFTPSiteUp() function checks a particular FTP site to see if it is ...
Python

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