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‎.gitbook/assets/Wechat.jpeg‎

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‎.gitbook/assets/book.json‎

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{
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"plugins": ["disqus"],
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"pluginsConfig": {
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"disqus": {
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"shortName": "ruicore"
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}
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}
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}

‎README.md‎

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## Python 使用技巧
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# Python 使用技巧
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> This repositorie contains ancillary function which code in python3. Use it freely.
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>
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> Crawl web function may conatain error\(s\) as the web elements changed.
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>
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> If you had any idea to improve my code or you find any mistake in my file, please contact me. \(Email me at [email protected]\)
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### 1.在列表，字典，集合中根据条件筛选数据
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## 1.在列表，字典，集合中根据条件筛选数据
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需求：
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1. 过滤 list 中大于 0 的数：[14, 0, -6, 0, -10, -8, -1, 19, -10, -16\]
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>
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2. 筛选出字典中值大于 0 的项目：{0: 9, 1: -3, 2: -8, 3: 6, 4: -4, 5: -4, 6: -7, 7: -8, 8: 7, 9: -3}
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>
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3. 筛选出集合中能被 2 整除的数：{3, 4, 9, 12, 15, 17, 19, 20}
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>
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4. 找到字典中值最小的健值对：prices = {'ACME': 45.23,'AAPL': 612.78,'IBM': 205.55,'HPQ': 37.20,'FB': 10.75}
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>
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5. 对字典排序，首先按照值排序，值相同再按照健排序 6. 对字典的健按照值排序
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需求： 1. 过滤 list 中大于 0 的数：\[14, 0, -6, 0, -10, -8, -1, 19, -10, -16\] > 2. 筛选出字典中值大于 0 的项目：{0: 9, 1: -3, 2: -8, 3: 6, 4: -4, 5: -4, 6: -7, 7: -8, 8: 7, 9: -3} > 3. 筛选出集合中能被 2 整除的数：{3, 4, 9, 12, 15, 17, 19, 20} > 4. 找到字典中值最小的健值对：prices = {'ACME': 45.23,'AAPL': 612.78,'IBM': 205.55,'HPQ': 37.20,'FB': 10.75} > 5. 对字典排序，首先按照值排序，值相同再按照健排序 6. 对字典的健按照值排序
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```python
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list_bigger = [x for x in list_nums if x > 0]
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# zip 创建的对象只能访问一次
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```
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### 2.命名，统计，字典
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## 2.命名，统计，字典
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需求：在表格中，每一行的信息固定，为了访问某个位置的值，不使用索引
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order[x] = randint(4,10)
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```
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### 3.字符串
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## 3.字符串
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需求：根据多个分隔符，拆分字符串
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res = re.sub(r"(\d{2})\/(\d{2})\/(\d{4})", r"\3-\1-\2", text)
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```
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### 4.遍历
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## 4.遍历
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需求：同时遍历可迭代对象
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print(x)
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```
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### 5.类
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## 5.类
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需求：为了确保用户输入正确格式的数，强制用户使用函数进行访问；为了简介，通过 property 自动调用函数，实现「设置属性自动调用函数的效果」
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print(fun(mc))
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```
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### 6. 装饰器
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## 6. 装饰器
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1. 需求：为某一个函数增加功能，不影响原来的函数
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test()
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```
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### 7. 优先队列
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## 7. 优先队列
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需求：实现一个有优先级的队列
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return heapq.heappop(self._queue)[-1] if self._queue else None
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```
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### 8. 展开嵌套的 list
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## 8. 展开嵌套的 list
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```python
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from collections.abc import Iterable
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for x in flatten(items):
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print(x)
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```
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### 9. 文件
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## 9. 文件
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1. 打印输出到文件中
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f.write('Hello\n')
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```
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### 10. 使用强制关键字参数
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## 10. 使用强制关键字参数
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```python
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def recv(maxsize, *, block):
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recv(1024, True) # TypeError
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recv(1024, block=True) # Ok
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```
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### 11. 比较两个字典是否相等
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## 11. 比较两个字典是否相等
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* 键个数相等，键名一一对应，键值一一对应相等
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```py
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import json
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from datetime import datetime
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from bson.json_util import default
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\`\`\`py
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import json
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def compare_2_dict(dict_1, dict_2):
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return (json.dumps(dict_1, default=default, sort_keys=dict.keys) ==
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json.dumps(dict_2, default=default, sort_keys=dict.keys))
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from datetime import datetime
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from bson.json\_util import default
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dicta = {"a": datetime.now(), "b": 2}
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dictb = {"a": datetime.now(), "b": 2}
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def compare\_2\_dict\(dict\_1, dict\_2\): return \(json.dumps\(dict\_1, default=default, sort\_keys=dict.keys\) == json.dumps\(dict\_2, default=default, sort\_keys=dict.keys\)\)
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print(compare_2_dict(dicta, dictb))
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dicta = {"a": datetime.now\(\), "b": 2} dictb = {"a": datetime.now\(\), "b": 2}
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```
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print\(compare\_2\_dict\(dicta, dictb\)\)
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```text
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### 12. Lambda
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* 在 for loop 中使用 lambda，如果有赋值，请小心
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res_m = [func() for func in m]
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```
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* res_t: [3, 3, 3, 3]
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* rest_m: [0, 1, 2, 3]
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### 13. Iterator
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* res\_t: \[3, 3, 3, 3\]
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* rest\_m: \[0, 1, 2, 3\]
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## 13. Iterator
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* iterator 不走回头路，可以利用此特性来判断 list 是否存在于另一个 list 中
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```py
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```python
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‎SUMMARY.md‎

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# Table of contents
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* [Python 使用技巧](README.md)
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* [doc](doc/README.md)
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* [在服务器上生成 SSH-KEY 密钥](doc/ssh-key.md)
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* [monitor](doc/monitor.md)
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* [pyspark](doc/pyspark.md)
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* [docker 拷贝文件到 docker 外](doc/docker.md)
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* [command](doc/command.md)
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* [说明](usage/README.md)
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* [tree](usage/tree/README.md)
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* [Tree](usage/tree/tree.md)
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* [simple decorator usage](usage/decorator.md)
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* [5118](usage/5118/README.md)
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* [词语分析聚合](usage/5118/5118.md)
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* [Batch Read file](usage/read_file.md)
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* [sdk](sdk/README.md)
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* [load2neo4j](sdk/load2neo4j.md)
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‎doc/README.md‎

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# doc
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‎doc/command.md‎

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# command
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## zsh
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On Ubuntu:
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apt install zsh
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On Ubuntu: apt install zsh
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dnf install zsh
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On CentOS: dnf install zsh
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chsh -s /usr/bin/zsh root
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On Ubuntu: chsh -s /usr/bin/zsh root
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chsh -s /bin/zsh root
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On CentOS: chsh -s /bin/zsh root
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apt install wget git
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wget https://github.com/robbyrussell/oh-my-zsh/raw/master/tools/install.sh -O - | zsh
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wget [https://github.com/robbyrussell/oh-my-zsh/raw/master/tools/install.sh](https://github.com/robbyrussell/oh-my-zsh/raw/master/tools/install.sh) -O - \| zsh
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sudo tail -n 20 /var/log/nginx/error.log
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<!-- nginx docker log-->
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rm -f /var/log/nginx/*
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nginx -s reload
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rm -f /var/log/nginx/\* nginx -s reload
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## Coverage
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`# pragma: no cover`
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## nginx搭建自签名SSL证书
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openssl genrsa -out server.key 2048
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openssl req -new -key server.key -out server.csr
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Common Name (e.g. server FQDN or YOUR name) []:10.10.10.10
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openssl x509 -req -in server.csr -signkey server.key -out server.crt
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openssl genrsa -out server.key 2048 openssl req -new -key server.key -out server.csr Common Name \(e.g. server FQDN or YOUR name\) \[\]:10.10.10.10 openssl x509 -req -in server.csr -signkey server.key -out server.crt
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在 Chrome 浏览器中输入 `thisisunsafe`，直接在浏览器中输入即可 [https://cloud.tencent.com/developer/article/1160294](https://cloud.tencent.com/developer/article/1160294)
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在 Chrome 浏览器中输入 `thisisunsafe`，直接在浏览器中输入即可
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https://cloud.tencent.com/developer/article/1160294
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~~缓存自动刷新\(v2.2 及以前版本支持\)~~
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~~缓存自动刷新(v2.2 及以前版本支持)~~

‎doc/docker.md‎

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## docker 拷贝文件到 docker 外
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# docker 拷贝文件到 docker 外
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`docker cp d7908371bcab:/home/herui/baikeNode .`
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``` docker cp d7908371bcab:/home/herui/baikeNode .```

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