languages/cpython
languages/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython synced 2024-10-08 02:59:48 +00:00
Code Issues Packages Projects Releases Wiki Activity

Doc tested the recipes.

Browse source
This commit is contained in:
Raymond Hettinger 2004-07-05 20:17:13 +00:00
parent 9c719bafbf
commit c4f93d4410
1 changed files with 10 additions and 5 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

15
Doc/lib/libdecimal.tex
View file

@ -882,6 +882,7 @@ Here are some functions demonstrating ways to work with the
\begin{verbatim}
from decimal import Decimal, getcontext
getcontext().prec = 28
def moneyfmt(value, places=2, curr='$', sep=',', dp='.', pos='', neg='-'):
"""Convert Decimal to a money formatted string.
@ -928,7 +929,11 @@ def moneyfmt(value, places=2, curr='$', sep=',', dp='.', pos='', neg='-'):
return ''.join(result)
def pi():
"Compute Pi to the current precision"
"""Compute Pi to the current precision.
>>> print pi()
3.141592653589793238462643383279502887
"""
getcontext().prec += 9 # extra digits for intermediate steps
one = Decimal(1) # substitute "one=1.0" for regular floats
lastc, t, c, n, na, d, da = 0*one, 3*one, 3*one, 1, 0, 0, 24*one
@ -951,7 +956,7 @@ def exp(x):
"""
getcontext().prec += 9 # extra digits for intermediate steps
one = Decimal(1) # substitute "one=1.0" for regular floats
i, laste, e, fact, num = 0*one, 0*one, one, one, one
i, laste, e, fact, num = 0, 0, 1, 1, 1
while e != laste:
laste = e
i += 1
@ -969,7 +974,7 @@ def cos(x):
"""
getcontext().prec += 9 # extra digits for intermediate steps
one = Decimal(1) # substitute "one=1.0" for regular floats
i, laste, e, fact, num, sign = 0*one, 0*one, one, one, one, one
i, laste, e, fact, num, sign = 0, 0, 1, 1, 1, 1
while e != laste:
laste = e
i += 2
@ -988,7 +993,7 @@ def sin(x):
"""
getcontext().prec += 9 # extra digits for intermediate steps
one = Decimal(1) # substitute "one=1.0" for regular floats
i, laste, e, fact, num, sign = one, 0*one, x, one, x, one
i, laste, e, fact, num, sign = 1, 0, x, 1, x, 1
while e != laste:
laste = e
i += 2
@ -997,6 +1002,6 @@ def sin(x):
sign *= -1
e += num / fact * sign
getcontext().prec -= 9
return e
return e
\end{verbatim}