118. Pascal's Triangle Given numRows, generate the first numRows of Pascal's triangle. For example, given numRows = 5,Return [ [1], [1,1], [1,2,1], [1,3,3,1], [1,4,6,4,1] ] class Solution(object): def generate(self, numRows): """ :type numR
摇骰子游戏升级 此次更改增加下注功能,启动资金1000元,每次赔率都是一倍,钱输光退出. 源码: #!/user/bin/env python #-*-coding:utf-8 -*- #Author: qinjiaxi import random #一次摇三个骰子并将结果存在列表中 def role_a_dice(number = 3, point = None ): print('Let\'s play a game') if point is None: point = [] while
from array import array from random floats = array('d',random((for i in range(10**7)) fp = open('floats.bin','wb') floats.tofile(fp) fp.close() floats2 = array('d') fp1 = open('floats.bin','rb') floats2.fromfile(fp1,10**7) fp1.close()
python中通常情况下for循环会枚举各个元素不会访问下标,例如: l = [1,2,4,6] for val in l: print l 但是有时候我们会需要在便利数组的同时访问下标,这时候可以借助于enumerate函数来实现,例如: l = [1,2,3] for index,val in enumerate(l): print 'index is %d, val is %d' % (index,val)
Attributes of numpy.ndarray: numpy.ndarray.shape: Dimensions (height, width, ...) numpy.ndarray.ndim: No. of dimensions = len(shape) numpy.ndarray.size: Total number of elements numpy.ndarray.dtype: Datatype import numpy as np def array(): a = np.ran
# coding =utf-8 import random def roll_dice(number=3, points=None): if points == None: points = [] while number > 0: point = random.randrange(1,7) points.append(point) number = number - 1 return points def roll_result(total): print('<<<<<
import os path = r'/Users/authurchen/PycharmProjects/Demo' # print(os.listdir(path)) ls = os.listdir(path)files = [] def get_all_file(dir_path): global files for filepath in os.listdir(dir_path): tmp_path = os.path.join(dir_path,filepath) if os.path.