python - 随笔分类(第40页) - anobscureretreat

python 单例

摘要：class Dog(object): __first_new = True __instance = None def __new__(cls): if cls.__first_new: cls.__instance = object.__new__(cls) ... 阅读全文

posted @ 2018-12-05 12:33 anobscureretreat 阅读(154) 评论(0) 推荐(0)

python 安装 simplejson

摘要：pip install simplejson 阅读全文

posted @ 2018-11-29 16:32 anobscureretreat 阅读(294) 评论(0) 推荐(0)

python 在列表中添加元组元素，按照元组第一个值进行排序

摘要：>>> import bisect >>> scores = [(100, 'perl'), (200, 'tcl'), (400, 'lua'), (500, 'python')] >>> bisect.insort(scores, (300, 'ruby')) >>> scores [(100, 'perl'), (200, 'tcl'), (300, 'ruby'), (400, ' 阅读全文

posted @ 2018-11-27 19:25 anobscureretreat 阅读(7729) 评论(0) 推荐(1)

python 哈希查找

摘要：import random INDEXBOX=7 #哈希表元素个数 MAXNUM=13 #数据个数 class Node: #声明链表结构 def __init__(self,val): self.val=val self.next=None global indextable indextable=[Node... 阅读全文

posted @ 2018-11-25 23:20 anobscureretreat 阅读(598) 评论(0) 推荐(0)

python 堆栈

摘要：class Node: #堆栈链结节点的声明 def __init__(self): self.data=0 #堆栈数据的声明 self.next=None #堆栈中用来指向下一个节点 top=None def isEmpty(): global top if(top==None): return 1 e... 阅读全文

posted @ 2018-11-25 19:41 anobscureretreat 阅读(385) 评论(0) 推荐(0)

python 矩阵转置

摘要：输出阅读全文

posted @ 2018-11-25 18:14 anobscureretreat 阅读(356) 评论(0) 推荐(0)

python 单向链表

摘要：输出阅读全文

posted @ 2018-11-25 17:41 anobscureretreat 阅读(217) 评论(0) 推荐(0)

python 读空的json文件

摘要：读空的json文件，python2和python3 的错误提示是不一样的 python2: python3: 解决：针对python2 针对python3 阅读全文

posted @ 2018-11-24 12:47 anobscureretreat 阅读(1206) 评论(0) 推荐(0)

python yaml文件读写

摘要：import yaml yaml_dict={"sss":"111","ddd":"222"} with open("a.yaml", "w") as f: yaml.safe_dump(yaml_dict,f,encoding='utf-8', allow_unicode=True) with open("a.yaml") as f: yaml_dict = yaml.l... 阅读全文

posted @ 2018-11-23 19:00 anobscureretreat 阅读(388) 评论(0) 推荐(0)

python 字符串输出

摘要：>>> 'spam eggs' # single quotes 'spam eggs' >>> 'doesn\'t' # use \' to escape the single quote... "doesn't" >>> "doesn't" # ...or use double quotes instead "doesn't" >>> '"Yes," 阅读全文

posted @ 2018-11-23 17:07 anobscureretreat 阅读(219) 评论(0) 推荐(0)

python 列表元素替换以及删除

摘要：>>> letters = ['a', 'b', 'c', 'd', 'e', 'f', 'g'] >>> letters ['a', 'b', 'c', 'd', 'e', 'f', 'g'] >>> # replace some values >>> letters[2:5] = ['C&# 阅读全文

posted @ 2018-11-23 16:54 anobscureretreat 阅读(6306) 评论(0) 推荐(0)

python 列表嵌套

摘要：>>> a = ['a', 'b', 'c'] >>> n = [1, 2, 3] >>> x = [a, n] >>> x [['a', 'b', 'c'], [1, 2, 3]] >>> x[0] ['a', 'b', 'c'] >>> x[0][1] 'b' 阅读全文

posted @ 2018-11-23 16:50 anobscureretreat 阅读(204) 评论(0) 推荐(0)

python 堆排序

摘要：第一个元素一定是最小的,如果每次只想拿到列表的最小值，不想整个列表排序，可以通过不断返回最小值的方法实现阅读全文

posted @ 2018-11-23 16:29 anobscureretreat 阅读(150) 评论(0) 推荐(0)

python 操作Excel表格，解压zip包，压缩zip包，目录遍历

摘要：import zipfile import os,shutil import openpyxl file_list_pos="" fileName="" zipfileName="" def un_zip(file_name): """unzip zip file""" zip_file = zipfile.ZipFile(file_name) if o... 阅读全文

posted @ 2018-11-23 16:06 anobscureretreat 阅读(1049) 评论(0) 推荐(0)

python 解压zip压缩包

摘要：在当前路径解压zip压缩包，生成同名文件夹，内部目录结构与压缩包一致阅读全文

posted @ 2018-11-23 16:04 anobscureretreat 阅读(5047) 评论(0) 推荐(0)

python 生成zip压缩包

摘要：import zipfile file_name="a.txt" f = zipfile.ZipFile('test.zip','w',zipfile.ZIP_STORED) f.write(file_name) f.close() 阅读全文

posted @ 2018-11-23 15:47 anobscureretreat 阅读(2810) 评论(0) 推荐(0)

python 字符串压缩

摘要：输出阅读全文

posted @ 2018-11-23 14:51 anobscureretreat 阅读(801) 评论(0) 推荐(0)

python 匹配指定后缀的文件名

摘要：import glob x=glob.glob('*.py') print(x) 阅读全文

posted @ 2018-11-23 11:01 anobscureretreat 阅读(3736) 评论(0) 推荐(0)

python 获取二维数组所有元素

摘要：import itertools original_list = [[2,4,3],[1,5,6], [9], [7,9,0]] new_merged_list = list(itertools.chain(*original_list)) print(new_merged_list) 阅读全文

posted @ 2018-11-22 21:29 anobscureretreat 阅读(2716) 评论(0) 推荐(0)

python 字符串替换

摘要：输出阅读全文

posted @ 2018-11-22 20:32 anobscureretreat 阅读(217) 评论(0) 推荐(0)

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随笔分类 - python