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"""https://leetcode.com/problems/search-insert-position/submissions/"""

class Solution:
    def searchInsert(self, nums, target):
        if target < nums[0]:
            return 0
        pos = 0
        for num in nums:
            if target > num:
                pos += 1
            if target <= num:
                return pos
        return len(nums)


if __name__ == '__main__':
    s = Solution()
    nums, target = [1,3,5,6], 5
    assert s.searchInsert(nums, target) == 2
    nums, target = [1,3,5,6], 2
    assert s.searchInsert(nums, target) == 1
    nums, target = [1,3,5,6], 7
    assert s.searchInsert(nums, target) == 4
    nums, target = [1,3,5,6], 0
    assert s.searchInsert(nums, target) == 0

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"""
判断字符串是否回文
https://leetcode.com/problems/valid-palindrome/
"""
class Solution:
    def isPalindrome(self, s: str) -> bool:
        if len(s) <= 1:
            return True
        start = 0
        end = len(s) - 1
        s = s.lower()
        while start < end:
            if not s[start].isalnum():
                start += 1
            elif not s[end].isalnum():
                end -= 1
            else:
                if s[start] != s[end]:
                    return False
                start += 1
                end -= 1
        return True


if __name__ == '__main__':
    s = Solution()
    assert s.isPalindrome("A man, a plan, a canal: Panama") == True
    assert s.isPalindrome("race a car") == False

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draw.io做好图后，crop 导出为pdf格式，然后用linux下命令gs, convert[负责压缩]转化为tif格式

pdb2tif

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#!/bin/sh

for i in $@; do
  BN=$(basename $i .pdf)
  gs -q -r300x300 -dNOPAUSE -sDEVICE=tiff24nc -sOutputFile=$BN.tif $i -c quit
  convert $BN.tif -compress lzw $BN.tif
  # convert $BN.tif $BN.png  # 也可以生成新的格式，如png
done

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pypi 镜像使用帮助

临时使用

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pip install -i https://pypi.tuna.tsinghua.edu.cn/simple some-package

设为默认

升级 pip 到最新的版本 (>=10.0.0) 后进行配置：

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pip install pip -U
pip config set global.index-url https://pypi.tuna.tsinghua.edu.cn/simple

如果您到 pip 默认源的网络连接较差，临时使用本镜像站来升级 pip：

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pip install -i https://pypi.tuna.tsinghua.edu.cn/simple pip -U

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parsyncfp

hjmangalam/parsyncfp: follow-on to parsync (parallel rsync) with better startup perf

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./parsyncfp --NP=4 --CS=100K --nowait --rsyncopts="-uv" --startdir="/home/zzp" "test" "/home/zzp/program/"

rsync + parallel

将

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并行增量备份的另一种实现(rsync+parallel)

```bash
#!/bin/bash

dst="/mnt/500G移动硬盘/results/"
filename="backuplist"
ncpu=8

cat $filename | parallel -j $ncpu "rsync -urv {} $dst"

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sys.settrace 为built-in函数

底层实现代码

sys.settrace 调用关系

  1. https://github.com/python/cpython/blob/master/Python/sysmodule.c
  2. https://github.com/python/cpython/blob/master/Python/ceval.c

PyFrameObject 实现

  1. https://github.com/python/cpython/blob/master/Include/frameobject.h
  2. https://github.com/python/cpython/blob/master/Objects/frameobject.c
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import sys


def trace_func(frame, event, arg):
    value = frame.f_locals["a"]
    if value % 2 == 0:
        value += 1
        frame.f_locals["a"] = value


def f(a):
    print(a)


if __name__ == "__main__":
    trace = sys.gettrace()
    sys.settrace(trace_func)
    for i in range(0, 5):
        f(i)
    sys.settrace(trace)

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输出日志文件名称

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@pysnooper.snoop("test.log")

定义debug的函数调用层级

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@pysnooper.snoop("test.log", depth=2)

添加非局部变量的修改记录

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@pysnooper.snoop("test.log", variables=('K', 'P'))
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import pysnooper


K = 0


def f(i):
    global K
    K += 1
    j = i ** 2
    return j


def g(i):
    global K
    K += 1
    j = i + f(i)
    return j


#@pysnooper.snoop("test.main.log", depth=1, variables=('K', ))
@pysnooper.snoop("test.main.log", depth=1)
def main():
    for i in range(4):
        print(g(i))


if __name__ == '__main__':
    main()

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install ncurses

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tar zxf ncurses-6.1.tar.gz
./configure --prefix=/home/zzp/.local
make && make install

install htop

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tar zxf htop.tar.gz
./configure --prefix=/home/zzp/.local CFLAGS=-I/home/zzp/.local/include LDFLAGS=-L/home/zzp/.local/lib

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pip3 install twilio

https://www.twilio.com/

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from twilio.rest import Client


def send_message(message):
    account = "ACXXXXXXXXXXXXX"
    token = "XXXXXXXXXXXXXXXXX"
    client = Client(account, token)
    message = client.messages.create(
        to="+86XXXXXXXX", from_="+XXXXXXXXX", body=message)