- 方法1，使用Python merge 在使用Excel时，我用的最多函数就是vlookup；在使用SQL查询的时候，我用的最多应该是join；这两个都有相同的功能，将多表匹配、合并，然后达到对比、查漏等等效果。在pandas里面也有类似的功能函数就是pd.merge()。merge的用法跟SQL中join很像。
https://zhuanlan.zhihu.com/p/30113030
- 方法2，使用{}返回匹配的整行.
Hank Honghe
Honghe
/ gist:45e01ef6083268d1f43dad24b74ddab0
Last active
June 8, 2018 15:16
Install Vim 8 with Python, Python 3, Ruby and Lua support on Ubuntu 16.04
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| sudo apt-get remove --purge vim vim-runtime vim-gnome vim-tiny vim-gui-common | |
| sudo apt-get install liblua5.1-dev luajit libluajit-5.1 python-dev ruby-dev libperl-dev libncurses5-dev libatk1.0-dev libx11-dev libxpm-dev libxt-dev | |
| #Optional: so vim can be uninstalled again via `dpkg -r vim` | |
| sudo apt-get install checkinstall | |
| # use `which vim` to locate the vim directory first | |
| sudo rm -rf /usr/local/share/vim /usr/bin/vim /usr/local/bin/vim |
Honghe
/ app.py
Created
June 22, 2018 07:57
— forked from rduplain/app.py
Add a second static directory to Flask, in ../static/.
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| from flask import Flask, send_from_directory | |
| app = Flask(__name__) | |
| @app.route('/base/<path:filename>') | |
| def base_static(filename): | |
| return send_from_directory(app.root_path + '/../static/', filename) |
Honghe
/ matplotlib Border Removal.ipynb
Created
July 25, 2018 07:13
— forked from kylemcdonald/matplotlib Border Removal.ipynb
How to (mostly) remove all borders and padding with matplotlib.
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Honghe
/ gist:12a1d6ffc5cc580646aeef55cb306ded
Created
October 16, 2018 11:01
Python wav sound convert
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| with open("audioData_original.wav", 'wb') as of: | |
| of.write(message['audio']) | |
| audioFile = wave.open("audioData_original.wav", 'r') | |
| n_frames = audioFile.getnframes() | |
| audioData = audioFile.readframes(n_frames) | |
| originalRate = audioFile.getframerate() | |
| af = wave.open('audioData.wav', 'w') | |
| af.setnchannels(1) | |
| af.setparams((1, 2, 16000, 0, 'NONE', 'Uncompressed')) | |
| converted = audioop.ratecv(audioData, 2, 1, originalRate, 16000, None) |
Honghe
/ simple-https-server.py
Created
October 16, 2018 11:34
— forked from dergachev/simple-https-server.py
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| # taken from http://www.piware.de/2011/01/creating-an-https-server-in-python/ | |
| # generate server.xml with the following command: | |
| # openssl req -new -x509 -keyout server.pem -out server.pem -days 365 -nodes | |
| # run as follows: | |
| # python simple-https-server.py | |
| # then in your browser, visit: | |
| # https://localhost:4443 | |
| import BaseHTTPServer, SimpleHTTPServer | |
| import ssl |
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| # -*- coding: utf-8 -*- | |
| import logging | |
| import os | |
| import mysql.connector | |
| import pandas as pd | |
| logging.basicConfig(level=logging.DEBUG) | |
Honghe
/ taichi_zoo_N_body.py
Created
October 23, 2021 17:13
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| import taichi as ti | |
| ti.init(ti.gpu) | |
| # global control | |
| paused = ti.field(ti.i32, ()) | |
| # gravitational constant 6.67408e-11, using 1 for simplicity | |
| G = 1 | |
| PI = 3.141592653 |
Honghe
/ gist:bbd7936489548dc87336f84f70841767
Created
December 27, 2021 03:01
https://github.com/ohmybash/ font theme with conda venv prompt.
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| diff --git a/themes/font/font.theme.sh b/themes/font/font.theme.sh | |
| index c691e57..5a9dcc3 100644 | |
| --- a/themes/font/font.theme.sh | |
| +++ b/themes/font/font.theme.sh | |
| @@ -37,12 +37,23 @@ THEME_CLOCK_FORMAT=${THEME_CLOCK_FORMAT:-"%I:%M:%S"} | |
| VIRTUALENV_THEME_PROMPT_PREFIX='(' | |
| VIRTUALENV_THEME_PROMPT_SUFFIX=') ' | |
| +function _python_venv_prompt { |
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