Python模块随想随记
时常见到一些好的Python模块，如果不随时记下，等用的时候又是一阵乱翻，好在Python引用一个模块极其方便，OK，废话少说：
1. decimal
标准模块，2.4引入，用于浮点数的精确表示：
>>> 0.1 + 0.1 + 0.1 - 0.3
5.5511151231257827e-17
>>> from decimal import Decimal
>>> def _(x): return Decimal(str(x))
...
>>> _(0.1)+_(0.1)+_(0.1)+_(-0.3)
Decimal('0.0')
相关文档：
And last here is the overload operators example:
# map() takes two (or more) arguments, a function and a list to apply the function to
# lambda can be put anywhere a function is expected
# map() calls lambada for every element in the self list
# since Vector has overloaded __getitem__ and __len_ ......
#堆排序
def Heapify(mylist, start, end):
left = 0
right = 0
maxv = 0
left = start * 2
right = start * 2 + 1
while left <= end:
maxv = left
if right <= end:
if mylist[left] < mylist[right]:
maxv = right
......
我的环境是：Linux version 2.4.21-4.EL
(bhcompile@daffy.perf.redhat.com) (gcc version 3.2.3 20030502 (Red Hat
Linux 3.2.3-20)) #1 Fri Oct 3 18:13:58 EDT 2003 + Python2.6.4
本文结合我安装时候的问题，总结而成
用户目录如/home/liuguanyu/ , 保证用户有root权限
1，看看有没有安装
&nbs ......
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