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Data Flow Builder Python scripts

Constellation Finder

The script demonstrates the use of SETs in Python. There is a key object that has constellations already identified and a stars object that contains the stars in the sky. Keys are used to unlocks the stars and the results are printed out for the user of the program. ...
Python

Improved TemporaryFile

This script allows a temporary file implementation that uses memory unless either capacity is breached or fileno is requested, at which point a real temporary file will be created and the relevant details returned. ...
Python

Pivot Crosstab Denormalization of Normalized List

This script shows you a function that creates a cross-tab or pivot table from a normalised input table. You can use this function to 'denormalize' a table of normalized records. ...
Python

Copying and Pasting Directories and Files

... is not a directory or a file. The data returned from copy_dir() is in a format that paste_dir() can understand. A design note: what you get back from copy_dir() may be different whether or not you have a path separator at the end of the path; paste_dir() makes use of ...
Python

Resuming download of a file

... that we only want a certian range of data to be downloaded. The server must support this, but this is part of the HTTP1.1 spec, so it should be widely supported.I essentially use the urllib.FancyURLopener to do all the dirty work of adding a new header and doing the normal ...
Python

min max peaks with Numeric

... and max for each block, the so-called "peaks data". ...
Python

Create an ODBC data source

... ctypes module, this script creates the required ODBC data sources when you install database applications that use ODBC. Requirements: · ctypes ...
Python

catenateFilesFactory

... common variations.Catenating (or concatenating) files is a common data processing task, but there are 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 easy to handle. So are text files - unless the last ...
Python

File Subclass

If the 'file' object looks for a '.filename.pkl' file which contains the seek offset of the previous end of the file, then this subclass sets the seek offset to that number before returning the file.On closing the file or StopIteration, it writes the new max offset to this pickle file. ...
Python

Parse and create fixed size binary data

Python's struct library is too low-level for direct usage. This script having only 40 lines shows how it can be turned into more developer-friendly tool. ...
Python

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