Saturday 20 April 2024

Convertion Excel SpreadSheets into SQLITE3 Database via python on Fedora 40 WKS

 Original task proposed here  https://inf-ege.sdamgia.ru/problem?id=47000 

Python script code

(.env) boris@fedora40RCKDE:~/EXCEL$ cat excelSqlite.py
import sqlite3
import pandas as pd
 
con = sqlite3.connect('cps.db')
wb = pd.read_excel('031.xlsx',sheet_name = None)
for sheet in wb:
   wb[sheet].to_sql(sheet,con,index=False)
con.commit()
con.close()

$  rm -f cps.db
$  touch -f cps.db
$  python excelSqlite.py

Database tables structure

















SQL QUERY OUTPUT
















SOLVE USE SAMPLE OUTPUT obtained via excel filtering

















Sunday 10 October 2021

Python C++ Wrapper для решения одной задачи YandexQ используя решето Эратосфена как процедуру C++

Этот пост является непосредственным продолжением http://lxer.com/module/newswire/view/306255/index.html , что приведет к значительному увеличению производительности по сравнению с версией Python для процедуры решета Эратосфена.

Мы намерены использовать для решения https://github.com/mathbunnyru/python-cpp-extension

Загрузите и распакуйте tarball в Fedora 34 с установленными «инструментами разработки C» и python-devel. Настройте python venv в вашем рабочем каталоге

$ python3 -m venv .env

$ source .env/bin/activate

  and run straight away:-

$ python setup.py install

(.env) [boris@fedora34server python-cpp-extension-delta]$ ll

total 36

drwxrwxr-x. 5 boris boris   89 Oct 10 09:37 build

drwxrwxr-x. 2 boris boris   90 Oct 10 09:37 cpp_python_extension.egg-info

-rw-rw-r--. 1 boris boris  751 Oct 10 11:57 delta16.py

drwxrwxr-x. 2 boris boris   61 Oct 10 09:37 dist

-rw-rw-r--. 1 boris boris   85 Oct 10 09:18 MyProg.py

-rw-rw-r--. 1 boris boris 1192 Oct 10 09:18 README.md

-rw-rw-r--. 1 boris boris  682 Oct 10 09:18 setup.py

-rw-rw-r--. 1 boris boris  450 Oct 10 09:18 sieve.cpp

-rw-rw-r--. 1 boris boris  140 Oct 10 09:18 sieve.h

-rw-rw-r--. 1 boris boris 1542 Oct 10 09:18 sieve_python_wrapper.cpp

-rw-rw-r--. 1 boris boris  200 Oct 10 09:18 test_benchmark.py

(.env) [boris@fedora34server python-cpp-extension-delta]$ cat delta16.py

import cpp_python_extension

def sumDigits(N,k):

    sum = 0

    while (N != 0):

        sum = sum + N % k

        N = N // k

    return sum

def SearchNumber(uplimit,sdg):

   imax = 0

   zn = []

   # Here we invoke cpp_python_extension.sieve_of_eratosthenes 

   # been written in C++ via Python C API which returns 

   # python's object list containing all prime numbers <= uplimit

   zn = cpp_python_extension.sieve_of_eratosthenes(uplimit) 

   spisok = set(zn)

   for i in range(2,uplimit):

        # Look for highest prime number <= uplimit 

        # and summa of digits <= sdg

        if (i in spisok)  and sumDigits(i,10) <= sdg:

            if i > imax:

                 imax = i

   print("Maximum = ",imax)

def main():

   uplimit,sdg = 0,0

   uplimit = int(input("Input range of scan :"))

   sdg = int(input("Input sum of digits :"))

   SearchNumber(uplimit,sdg) 

if __name__ == "__main__":

       main()

Friday 24 September 2021

 The executor has three commands, which are assigned numbers:

1) Add 2  2) Add previous 3) Add the following

The first command increases the number by 2, the second - by the previous one (for example,the number 5 will be converted according to the rule 5 + 4), the third - to the next (similarly, 5 according to the rule 5 + 6 = 11).How many programs are there that the original number is 7 is converted to the number 63, while the computation path does not contain the number 43?


$ cat task23.py

a =[0]*130
a[7] =1

for i in range(7,43):
    a[i+2] += a[i]
    a[i + (i - 1)] += a[i]
    a[i + (i + 1)] += a[i]

for i in range(44,63):
    a[i+2] += a[i]
    a[i + (i - 1)] += a[i]
    a[i + (i + 1)] += a[i]

print(a[63])

$ python  task23.py
116
















Convertion Excel SpreadSheets into SQLITE3 Database via python on Fedora 40 WKS

  Original task proposed here   https://inf-ege.sdamgia.ru/problem?id=47000   Python script code (.env) boris@fedora40RCKDE : ~/EXCEL $ cat ...