import pyodbc
conn_str = (
"DRIVER={PostgreSQL Unicode};"
"DATABASE=postgres;"
"UID=postgres;"
"PWD=whatever;"
"SERVER=localhost;"
"PORT=5432;"
)
conn = pyodbc.connect(conn_str)
crsr = conn.execute("SELECT 123 AS n")
row = crsr.fetchone()
print(row)
crsr.close()
conn.close()
>>> help(ord)
Help on built-in function ord in module builtins:
ord(c, /)
Return the Unicode code point for a one-character string.
>>> ord('2')
50
>>> ord('п')
1087
>>> chr(50)
'2'
>>> chr(1087)
'п'
>>>import pygame
from pygame.locals import *
pygame.init()
screen = pygame.display.set_mode((640, 480))
clock = pygame.time.Clock()
def main():
while True:
for event in pygame.event.get():
if event.type == QUIT:
pygame.quit()
return
elif event.type == MOUSEWHEEL:
print(event)
print(event.x, event.y)
print(event.flipped)
print(event.which)
clock.tick(60)
main()Python .NET
PS C:\Users\user> C:\Users\user\AppData\Local\Programs\Python\Python38\python.exe -m pip install --trusted-host pypi.org --trusted-host files.pythonhosted.org pythonnet
Collecting pythonnet
Downloading pythonnet-2.5.2-cp38-cp38-win_amd64.whl (81 kB)
|████████████████████████████████| 81 kB 39 kB/s
Requirement already satisfied: pycparser in c:\users\user\appdata\local\programs\python\python38\lib\site-packages (from pythonnet) (2.20)
Installing collected packages: pythonnet
Successfully installed pythonnet-2.5.2
PS C:\Users\user> C:\Users\user\AppData\Local\Programs\Python\Python38\python.exe
Python 3.8.7 (tags/v3.8.7:6503f05, Dec 21 2020, 17:59:51) [MSC v.1928 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import clr
>>> from System import String
>>> from System import Math
>>> Math.Round(1.2346, 3)
1.235
>>>#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Module docstring
"""
import ...Ещё варианты обсуждают здесь https://stackoverflow.com/questions/1523427/what-is-the-common-header-format-of-python-files
import urllib.request
contents = urllib.request.urlopen(f"http://127.0.0.1:8000/").read()(Pdb) h
Documented commands (type help <topic>):
========================================
EOF c d h list q rv undisplay
a cl debug help ll quit s unt
alias clear disable ignore longlist r source until
args commands display interact n restart step up
b condition down j next return tbreak w
break cont enable jump p retval u whatis
bt continue exit l pp run unalias where
Miscellaneous help topics:
==========================
exec pdb
(Pdb)
python3 -m pdb myscript.pydf.loc[len(df)]=[‘8/19/2014′,’Jun’,’Fly’,’98765′]
>>> import pandas as pd
>>> from numpy.random import randint
>>> df = pd.DataFrame(columns=['lib', 'qty1', 'qty2'])
>>> for i in range(5):
>>> df.loc[i] = ['name' + str(i)] + list(randint(10, size=2))
>>> df
lib qty1 qty2
0 name0 3 3
1 name1 2 4
2 name2 2 8
3 name3 2 1
4 name4 9 6import sqlite3
import pandas as pd
cnx = sqlite3.connect('file.db')
df = pd.read_sql_query("SELECT * FROM table_name", cnx)