Dichha Rai dichharai

## yield-eg.py
def func():
  received = yield 'hello' # received is a generator
  return received
print(list(func())) # prints ['hello']

## modify_strings.csv

          
            Method/Attribue
             Purpose

            
              split()
               Split the string into a list; splitting it whenever the RE matches

            
              sub()
               Find all substrings where the RE matches and replace them with a different string

            
              subn()
               Does the same thing as sub() but returns the new string and the number of replacements.

## metacharacters.csv

          
            Metacharacters
             Description

            
              |
               'or' operator.

            
              ^
               matches at the beginning of lines.

            
              $
               matches at the end of a line. Can be end of a string or any location followed by a new line.

            
              \A
               matches only at the start of the string.

            
              \z
               matches only at the end of the string.

            
              \b
               this is a zero-width assertion that matches only at the beginning or end of a word.

            
              \B
               this is a zero-width assertion and is opposite of \b

## compilation_flag.csv

          
            Long Flag
             Short Flag
             Meaning

            
              ASCII
               A
               Makes several escapes like \w \b \s \d match only on ASCII characters.

            
              DOTALL
               S
               Make . match any character including newlines.

            
              IGNORECASE
               I
               Do case-insensitive matches.

            
              LOCALE
               L
               Do a locale-aware match.

            
              MULTILINE
               M
               Multi-line matching affecting ^ and $.

            
              VERBOSE
               X (for 'extended')
               Enable verbose REs which can be organized more cleanly and understandably.

## different_regex_notation.csv

          
            Regular String
             Raw String

            
              'happy*'
               r'happy*'

            
              '\\new'
               r'\new'

            
              '\\w+\\s+'
               r'\w+\s+'

## escape_stage.csv

          
            Characters
             Stage

            
              '\new'
               Text string to be matched

            
              '\\new'
               Escaped backslash for `re.compile()`

            
              '\\\\new'
               Escaped backslashes for a string literal

## multiple-threads-1.py
from threading import Thread
from time import perf_counter


def sum_up_to(start: int, end: int):
    total = 0
    print('start...')
    for i in range(start, end):
        total += i
    print('end...')

## single-thread-eg-0.py
from threading import Thread
from time import perf_counter


def sum_up_to(start: int, end: int):
    total = 0
    print('start...')
    for i in range(start, end):
        total += i
    print('end...')

## weak-ref-eg-3.py
import ctypes
import weakref
import gc

class Serval:
    def __init__(self, name, cousin = None):
        self.name = name
        self.cousin = cousin

class Cat:

## weak-ref-eg-2.py
import weakref
import gc
import ctypes


class PriceyObject:
    def __init__(self, name):
        self.name = name

    def __repr__(self):
	def func():
	received = yield 'hello' # received is a generator
	return received
	print(list(func())) # prints ['hello']
	Method/Attribue	Purpose
	split()	Split the string into a list; splitting it whenever the RE matches
	sub()	Find all substrings where the RE matches and replace them with a different string
	subn()	Does the same thing as sub() but returns the new string and the number of replacements.
	Metacharacters	Description
	\|	'or' operator.
	^	matches at the beginning of lines.
	$	matches at the end of a line. Can be end of a string or any location followed by a new line.
	\A	matches only at the start of the string.
	\z	matches only at the end of the string.
	\b	this is a zero-width assertion that matches only at the beginning or end of a word.
	\B	this is a zero-width assertion and is opposite of \b
Long Flag	Short Flag	Meaning
ASCII	A	Makes several escapes like \w \b \s \d match only on ASCII characters.
DOTALL	S	Make . match any character including newlines.
IGNORECASE	I	Do case-insensitive matches.
LOCALE	L	Do a locale-aware match.
MULTILINE	M	Multi-line matching affecting ^ and $.
VERBOSE	X (for 'extended')	Enable verbose REs which can be organized more cleanly and understandably.
	Regular String	Raw String
	'happy*'	r'happy*'
	'\\new'	r'\new'
	'\\w+\\s+'	r'\w+\s+'
	Characters	Stage
	'\new'	Text string to be matched
	'\\new'	Escaped backslash for `re.compile()`
	'\\\\new'	Escaped backslashes for a string literal
	from threading import Thread
	from time import perf_counter


	def sum_up_to(start: int, end: int):
	total = 0
	print('start...')
	for i in range(start, end):
	total += i
	print('end...')
	import ctypes
	import weakref
	import gc

	class Serval:
	def __init__(self, name, cousin = None):
	self.name = name
	self.cousin = cousin

	class Cat: