小编Py-*_*ser的帖子

如何创建许多文本文件,其中包括特定目录中文件的文件名,每个文本文件最多999行？

我从这开始:

find ./J0902-405/*.evt -maxdepth 1 -type f -fprintf files_xselect.list %f\\n

它在文本文件中正确写入文件名.但是之后,我需要设置999行限制,并在此限制之后,创建另一个包含以下999名称的文本文件,依此类推,直到列出所有*.evt文件.

我不知道我是如何弄乱代码属性的，但我最终得到了一个怪物：一个列表，其元素是元组，其元素是数组......

[(array([ 0.00773887,  0.00531894,  0.00533349,  0.00779727,  0.01482933,
    0.01247594,  0.01274703,  0.02111097,  0.01800994,  0.01398229,
    0.0098171 ,  0.01218634,  0.00987849,  0.01082564,  0.00739867,
    0.00930694,  0.01071009,  0.00871869,  0.00897236,         nan,
    0.06841951,  0.03529371,         nan,  0.016373  ,  0.0160713 ,
    0.0182685 ,         nan,  0.01816914,  0.01156275,  0.01283952,
           nan,  0.00962016,  0.00861139,  0.00776996,  0.0324668 ,
    0.00745239]),), (array([ 0.0059394 ,  0.00634485,  0.00588112,  0.00583169,  0.01051727,
    0.01061778,  0.01368865,  0.01033937,  0.0105504 ,  0.01073401,
    0.01276537,  0.01121004,  0.00761677,  0.01370088,  0.01133099,
    0.01176184,  0.00922666,  0.00655782,  0.00608386,  0.00686759,
    0.00935311,  0.01204305,  0.00912691,  0.01046725,  0.01721009,
    0.01446536,  0.01320765,  0.01304908,  0.01170495,  0.00884054,
    0.00964988,  0.01170055,  0.00673198,  0.00543281, …

我可能错过了关于统计或numpy/scipy的重要观点.我想用泊松统计生成随机数,其预期值a decimal less than 1例如是lambda = 0.6.当我pythonize这个:

>>> from scipy.stats import poisson
>>> import numpy as np
>>> lambda = 0.6
>>> poisson.rvs(lambda, size=10)
>>> print r
[2 2 0 0 0 2 1 0 0 2 ]

试

>>> r = np.real(poisson.rvs(lambda, size=10))

给出相同的结果.

为什么0和1之间没有小数？

我正在尝试修复对 Image 模块的调用（直到现在我才知道这个 Python 成像库），并且我需要升级Pillow，因为 中的文件/usr/lib/python3/dist-packages/PIL/Image.py声明版本为 1.1.7，但有更新的版本可用。

$  sudo pip3 install Pillow
[sudo] password di user: 
The directory '/home/user/.cache/pip/http' or its parent directory is not owned by the current user and the cache has been disabled.           

Please check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
The directory '/home/user/.cache/pip' or its parent directory is not owned by the current user and caching wheels has been disabled. …