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Data Flow Builder Python scripts

Composite design pattern using dictionaries

... It can be used to process hierarchical, tree-based data structures using Python dictionaries. ...
Python

Counting pages of PDF documents on Mac OS X

Given that PDF is a "native" data format on Mac OS X, it is very easy to get access to some properties of such documents. One is the number of pages. Using Python the necessary code to do this is only about four lines, plus some import and command-line plumbing, ...
Python

An interval mapping data structure

... kind of dictionary which allows you to map data intervals to values. You can then query the structure for a given point, and it returns the value associated to the interval which contains the point.Boundary values don't need to be an integer ; in the test unit a date-time object ...
Python

DirectoryStorage

DirectoryStorage is a Storage for ZODB, the object database used by Zope. It uses ordinary files and ... format; one file per revision per object. Your data is not locked away inside an unfamiliar, opaque database. - Disaster-preparedness. DirectoryStorage tools have been designed ... into a backup replica storage. This can minimise data loss after a hardware failure. - Fault-tolerant ...
Python

More accurate sum

... use any additional memory (although it destroys the data array), and also runs asymptotically faster for unlimited precision numbeuns asympr >/ ...
Python

GRAMPS

... allows you to store, edit, and research genealogical data. GRAMPS attempts to provide all of the common ... of information directly into GRAMPS and rearrange/manipulate any/all data events in the entire data base (in any order or sequence) to assist ...
Python

Printing of Database Cursor Contents

One of the problems of dealing with databases is presenting the result of a query when you may not know much about the data. This script uses the cursor's description attribute to try and provide appropriate headings, and optionally examines each output row to ensure column widths are adequate. ...
Python

Grouping objects into disjoint sets

... together into disjoint sets when a full-blown graph data structure would be overkill. Objects can be joined using .join(), tested for connectedness using joined(), and all disjoint sets can be retreived using get(). The objects being joined must be hashable. ...
Python

Personal Finance Assistance

... record all your daily expenses. It stores all data in SQLite.The program is menu-based program which can connect to database and then performming addition, updating, deletion and showing the summary. ...
Python

Null Object Design Pattern

... an 'intelligent' replacement for the often used primitive data type None in Python or Null (or Null pointers) in other languages. These are used for many purposes including the important case where one member of some group of otherwise similar elements is special for whatever reason. Most often this results ...
Python

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