felixmon

比较两个数字的大小，包含正负数的情形

A, B

A, B 为实数A

A 比 B 大了多少（百分比）：

[(A/B)-1]/[B/ABS(B)]

rsync -a /source/directory --files-from=/full/path/to/listfile /destination/directory

example:

rsync -a ./source --files-from=./list.txt ./new

Startup Scripts

Just like Linux

nano ~/.bashrc
## write some scripts

In a nut shell, you need to install some dependencies manually before actually install matplotlib.

Texmaker -> Options/Configure Texmaker/Commands/LaTeX

python -c "import ctypes; print(32 if ctypes.sizeof(ctypes.c_voidp)==4 else 64, 'bit CPU')"

fruits = ['lemon', 'pear', 'watermelon', 'tomato']

	from gtts import gTTS #updated 2024-06-19-081215
	from pydub import AudioSegment
	import os

	def text_to_speech_with_pauses(text, lang='zh-CN', pause_duration=8000):
	segments = text.split(',') # Split text at comma
	combined = AudioSegment.silent(duration=0) # Start with an empty segment

	for segment in segments:
	tts = gTTS(text=segment, lang=lang)

	import os
	import subprocess

	def extract_pages_from_pdf(source_file, page_range, output_file):
	try:
	subprocess.run(['pdftk', source_file, 'cat', page_range, 'output', output_file], check=True, capture_output=True, text=True)
	except subprocess.CalledProcessError as e:
	print(f"Error during 'pdftk' execution:\n{e.stderr}")
	exit(1)

	import pandas as pd
	import numpy as np

	# Specify the path to your excel file
	file_path = 'list.xlsx'

	# Read the Excel file
	df = pd.read_excel(file_path)

	# Drop rows with missing values

	# use index values, which are all Chinese characteres, as x labels,
	# but not enought space to display, so we need to display the characters vertically,
	# not jsut rotate x lables
	# but to display the characters one at each line.
	# reference & courtesy: https://blog.csdn.net/ai_clay/article/details/126038824

	df_new=df_filtered.index # get the index values from the original df

	df_new= df_new.map(lambda x: '\n'.join(x)) # one character each line

	#!/usr/bin/env python3

	"""Simple HTTP Server With Upload.

	This module builds on BaseHTTPServer by implementing the standard GET
	and HEAD requests in a fairly straightforward manner.

	see: https://gist.github.com/UniIsland/3346170
	"""