Question

对于以下代码，我想生成随机值，但KeyError at /book/copy/ 'book_details__title' Request Method: GET Request URL: http://localhost:8000/book/copy/?book_details__title=abc Django Version: 1.10.5 Exception Type: KeyError Exception Value: 'book_details__title' Exception Location: /Applications/MAMP/htdocs/python/01-virtual-env/lib/python2.7/site-packages/django_filters/filterset.py in qs, line 335 Python Executable: /Applications/MAMP/htdocs/python/01-virtual-env/bin/python Python Version: 2.7.10 Python Path: ['/Applications/MAMP/htdocs/library-new/services', '/Applications/MAMP/htdocs/python/01-virtual-env/lib/python27.zip', '/Applications/MAMP/htdocs/python/01-virtual-env/lib/python2.7', '/Applications/MAMP/htdocs/python/01-virtual-env/lib/python2.7/plat-darwin', '/Applications/MAMP/htdocs/python/01-virtual-env/lib/python2.7/plat-mac', '/Applications/MAMP/htdocs/python/01-virtual-env/lib/python2.7/plat-mac/lib-scriptpackages', '/Applications/MAMP/htdocs/python/01-virtual-env/lib/python2.7/lib-tk', '/Applications/MAMP/htdocs/python/01-virtual-env/lib/python2.7/lib-old', '/Applications/MAMP/htdocs/python/01-virtual-env/lib/python2.7/lib-dynload', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-darwin', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-tk', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac', '/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/plat-mac/lib-scriptpackages', '/Applications/MAMP/htdocs/python/01-virtual-env/lib/python2.7/site-packages', '/Applications/MAMP/htdocs/python/01-virtual-env/lib/python2.7/site-packages/Django-1.10.5-py2.7.egg', '/Applications/MAMP/htdocs/python/01-virtual-env/lib/python2.7/site-packages/MySQL_python-1.2.5-py2.7-macosx-10.12-intel.egg'] Server time: Tue, 24 Jan 2017 13:35:36 +0000中的值最多为dfCombined["TotalFreeSize"]，并且9.941458e+11会抛出错误，我该怎么办？< / p>

我无法找到randint函数..

randlong

Answer 1

randint将两个值作为参数，两个都是int。下限值和上限值。它将在这些值之间返回一个int。

另一方面，

mean（），std（）返回浮点值，作为一组值的mean和std。

你应该做的是给randint函数中的int参数。

你可以：

 average_age_test   = int ( dfCombined["TotalFreeSize"].mean() )
 std_age_test       = int ( dfCombined["TotalFreeSize"].std() )

希望有所帮助！如果它确实请upvote：）

样品：

输入：

A = int (9.941458e+11)
random.randint(0, A)

输出：

153271550649L    (type: long)

Answer 2

您可以简单地将0到1之间的随机值（使用random生成）映射到您的最大期望值，并且python将适当地投射它。这似乎适用于非常大的max值：

import random

max = 9.941458e91 # notice the '91' exponent here!

for i in xrange(10):
    val = long(random.random() * max)
    print val
    print type(val)
    print

示例输出（单值）：

    45525909158271540655933151699075210889481964268830820171688052775301692920778132706971090944
<type 'long'>

如何在numpy中实现randlong

2 个答案: