On Tue, Feb 1, 2011 at 04:29, col speed <ajarnco...@gmail.com> wrote: > > You can always change the precision in decimal. Just an idea....
Not exactly sure what you mean. But I just tried using decimal to get 123.2345274523452345235432452345 ** 2.3 to 300 digits: >>> from decimal import Decimal as D >>> import decimal >>> decimal.getcontext().prec =300 >>> D('123.2345274523452345235432452345')**D('2.3') Decimal('64370.1512280246915272663511041234541758816386398199132394466583175597615075198590980955633694480202503045760664137267271735342845242951082979103782026356856312125096217781701992298765824436994198599115081342290327111836807693742546891271393004992808057677786573779518236419674381269758803681315430784') >>> len('64370.1512280246915272663511041234541758816386398199132394466583175597615075198590980955633694480202503045760664137267271735342845242951082979103782026356856312125096217781701992298765824436994198599115081342290327111836807693742546891271393004992808057677786573779518236419674381269758803681315430784') 301 >>> I also did this on WolframAlpha.com (except the len) and found that decimal and WA agree exactly! (I had come to believe that setting decimal.getcontext().prec to n meant that the result would be in n digits, but that the accuracy would be much less, for large n.) Here's a screen shot of the WA result: <http://www.rcblue.com/Misc/WolframAlphaCalculationResult.gif>. The decimal module output ends with '15430784'; The 6th line of the WA output begins with "154307841' I also tried the same calculation with decimal.getcontext().prec =1840. WA's and decimal's results agreed exactly. Dick _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor