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svn+ssh://pythondev@svn.python.org/python/trunk ........ r66394 | benjamin.peterson | 2008-09-11 17:04:02 -0500 (Thu, 11 Sep 2008) | 1 line fix typo ........ r66404 | gerhard.haering | 2008-09-12 08:54:06 -0500 (Fri, 12 Sep 2008) | 2 lines sqlite3 module: Mark iterdump() method as "Non-standard" like all the other methods not found in DB-API. ........ r66412 | gerhard.haering | 2008-09-12 13:58:57 -0500 (Fri, 12 Sep 2008) | 2 lines Fixes issue #3103. In the sqlite3 module, made one more function static. All renaming public symbos now have the pysqlite prefix to avoid name clashes. This at least once created problems where the same symbol name appeared somewhere in Apache and the sqlite3 module was used from mod_python. ........ r66414 | gerhard.haering | 2008-09-12 17:33:22 -0500 (Fri, 12 Sep 2008) | 2 lines Issue #3846: Release GIL during calls to sqlite3_prepare. This improves concurrent access to the same database file from multiple threads/processes. ........ r66424 | andrew.kuchling | 2008-09-12 20:22:08 -0500 (Fri, 12 Sep 2008) | 1 line #687648 from Robert Schuppenies: use classic division. (RM Barry gave permission to update the demos.) ........ r66425 | andrew.kuchling | 2008-09-12 20:27:33 -0500 (Fri, 12 Sep 2008) | 1 line #687648 from Robert Schuppenies: use classic division. From me: don't use string exception; flush stdout after printing ........ r66426 | andrew.kuchling | 2008-09-12 20:34:41 -0500 (Fri, 12 Sep 2008) | 1 line #687648 from Robert Schuppenies: use classic division. From me: don't use string exception; add __main__ section ........ r66427 | andrew.kuchling | 2008-09-12 20:42:55 -0500 (Fri, 12 Sep 2008) | 1 line #687648 from Robert Schuppenies: use classic division. From me: remove two stray semicolons ........ r66428 | andrew.kuchling | 2008-09-12 20:43:28 -0500 (Fri, 12 Sep 2008) | 1 line #687648 from Robert Schuppenies: use classic division. ........ r66429 | andrew.kuchling | 2008-09-12 20:47:02 -0500 (Fri, 12 Sep 2008) | 1 line Remove semicolon ........ r66430 | andrew.kuchling | 2008-09-12 20:48:36 -0500 (Fri, 12 Sep 2008) | 1 line Subclass exception ........ r66431 | andrew.kuchling | 2008-09-12 20:56:56 -0500 (Fri, 12 Sep 2008) | 1 line Fix SyntaxError ........ r66432 | andrew.kuchling | 2008-09-12 20:57:25 -0500 (Fri, 12 Sep 2008) | 1 line Update uses of string exceptions ........ r66433 | andrew.kuchling | 2008-09-12 21:08:30 -0500 (Fri, 12 Sep 2008) | 1 line Use title case ........ r66434 | andrew.kuchling | 2008-09-12 21:09:15 -0500 (Fri, 12 Sep 2008) | 1 line Remove extra 'the'; the following title includes it ........ r66435 | andrew.kuchling | 2008-09-12 21:11:51 -0500 (Fri, 12 Sep 2008) | 1 line #3288: Document as_integer_ratio ........ r66436 | andrew.kuchling | 2008-09-12 21:14:15 -0500 (Fri, 12 Sep 2008) | 1 line Use title case ........
34 lines
918 B
Python
Executable file
34 lines
918 B
Python
Executable file
#! /usr/bin/env python
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# Print digits of pi forever.
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#
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# The algorithm, using Python's 'long' integers ("bignums"), works
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# with continued fractions, and was conceived by Lambert Meertens.
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#
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# See also the ABC Programmer's Handbook, by Geurts, Meertens & Pemberton,
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# published by Prentice-Hall (UK) Ltd., 1990.
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import sys
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def main():
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k, a, b, a1, b1 = 2, 4, 1, 12, 4
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while 1:
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# Next approximation
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p, q, k = k*k, 2*k+1, k+1
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a, b, a1, b1 = a1, b1, p*a+q*a1, p*b+q*b1
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# Print common digits
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d, d1 = a//b, a1//b1
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while d == d1:
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output(d)
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a, a1 = 10*(a%b), 10*(a1%b1)
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d, d1 = a//b, a1//b1
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def output(d):
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# Use write() to avoid spaces between the digits
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# Use str() to avoid the 'L'
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sys.stdout.write(str(d))
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# Flush so the output is seen immediately
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sys.stdout.flush()
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if __name__ == "__main__":
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main()
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