grihabor

go_file: decl_package [imports] ([decl_type] [decl_func])*
decl_package: "package" ident
imports: "import" single_import
| "import" multiple_imports
single_import: ["("] ESCAPED_STRING [")"]
multiple_imports: "(" ESCAPED_STRING+ ")"

stmt: stmt_var
| stmt_for
| stmt_if

grihabor

import socket

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect(("localhost", 50010))
msg_to_send = 'Hello world!'
bytes_to_send = msg_to_send.encode('utf-8')

print('Send to the server:', msg_to_send)
s.send(bytes_to_send)

grihabor

MAKE               := make --no-print-directory

DESCRIBE           := $(shell git describe --match "v*" --always --tags)
DESCRIBE_PARTS     := $(subst -, ,$(DESCRIBE))

VERSION_TAG        := $(word 1,$(DESCRIBE_PARTS))
COMMITS_SINCE_TAG  := $(word 2,$(DESCRIBE_PARTS))

VERSION            := $(subst v,,$(VERSION_TAG))
VERSION_PARTS      := $(subst ., ,$(VERSION))

grihabor

select 
  ProductID,
  sum(case 
    when first_order_datetime is null then 0
    else 1
  end)
from order_lines 
left join (
  select 
    min(Datetime) as first_order_datetime,  

grihabor

from functools import wraps

def print_function_name(f):
    @wraps(f)
    def wrapper(*args, **kwargs):
        print('Call: {}'.format(f.__name__))
        return f(*args, **kwargs)
    return wrapper

@print_function_name

grihabor

from datetime import datetime
import functools

def track_time(f):
    @functools.wraps(f)
    def wrapper(*args, **kwargs):
        start = datetime.now()
        result = f(*args, **kwargs)
        print('Run {}: {}'.format(f.__name__, datetime.now() - start))
        return result

grihabor

class Color:
    pass

empty = Color()
print(empty)
#|<__main__.Color object at 0xf709fff0>

grihabor

class Color:
    pass

print(Color)
#|<class '__main__.Color'>

grihabor

class Color:
    def __init__(self, r, g, b):
        self.r = r
        self.g = g
        self.b = b
    def __add__(self, other):
        return Color(
            (self.r + other.r) // 2,
            (self.g + other.g) // 2,
            (self.b + other.b) // 2,

grihabor

class Color:
    def __init__(color, r, g, b):
        color.r = r
        color.g = g
        color.b = b

white = Color(255, 255, 255)
print(white.r, white.g, white.b)
#|255 255 255