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What is the algorithm / recipe for determining the start of a billing cycle?
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What is the algorithm / recipe for determining the start of a billing cycle?

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Take it as given. For different clients, the start date can be any month or any day.
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Take it as given. For different clients, the start date can be any month or any day.

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So, when you say that you want to &quot;find the last billing date&quot;, given an input date of 10/20/2009 and a billing day of 8 (e.g, say you started your billing cycle on 1/8/2000), you want it to return 10/08/09, right?
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So, when you say that you want to "find the last billing date", given an input date of 10/20/2009 and a billing day of 8 (e.g, say you started your billing cycle on 1/8/2000), you want it to return 10/08/09, right?

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How you want one-month-ago(31.mar.2006)<wbr /> or one-month-ago(28.feb.2006)<wbr /> to work?<br />
Ie. when base date's day doesn't exist in the previous month?
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How you want one-month-ago(31.mar.2006) or one-month-ago(28.feb.2006) to work?
Ie. when base date's day doesn't exist in the previous month?

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Thanks for the grade &amp;&nbsp;points.<br />
<br />
Good luck &amp;&nbsp;have a great day.
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Thanks for the grade & points.

Good luck & have a great day.

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Hi,<br />
<br />
Lets say my activation date is 1/8/2008 and will use this as the base date or billing date.<br />
<br />
Given todays date, I need to find the last billing date. &nbsp;So..if todays date is 10/20/09 the start of the current cycle is 10/8/09. &nbsp;How do I find the current billing cycle taking into account year and month? &nbsp;E.g. if the current date is 1/2/2009 I need to know that 12/08/2008 was the start of the last billing cycle.<br />
<br />
Please show code.<br />
<br />
Thanks
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Hi,

Lets say my activation date is 1/8/2008 and will use this as the base date or billing date.

Given todays date, I need to find the last billing date.  So..if todays date is 10/20/09 the start of the current cycle is 10/8/09.  How do I find the current billing cycle taking into account year and month?  E.g. if the current date is 1/2/2009 I need to know that 12/08/2008 was the start of the last billing cycle.

Please show code.

Thanks

Finding the last months start date given intial date in Python

Python is a widely used general-purpose, high-level programming language. Its design philosophy emphasizes code readability, and its syntax allows programmers to express concepts in fewer lines of code than would be possible in other languages. Python supports multiple programming paradigms, including object-oriented, imperative and functional programming or procedural styles. It features a dynamic type system and automatic memory management and has a large and comprehensive set of standard libraries, including NumPy, SciPy, Django, PyQuery, and PyLibrary.