The life of TB

- A class is like a form or questionnaire.- An instance is like a form that has been filled out with information.- Just like many people can fill out the same form with their own unique information,many instances can be created from a single class.- Python class names are written in CapitalizedWords notation by convention.- Attributes created in .__init__()  are called instance attributes.- An i..

Python 2024. 12. 20. 13:04

import randomimport os### file write, read, delete if existdef main(): # with as를 사용하면 파일을 사용한 뒤 자동으로 파일 객체를 닫음 with open('my_file.txt', 'w') as f: for _ in range(10): f.write('a' * random.randint(0, 100)) f.write('\n') lens = [len(x) for x in open('my_file.txt')] print(lens) if os.path.exists('my_file.txt'): os.remove('my_file.txt') prin..

Python 2024. 12. 20. 11:41

# How is it different than the sort list method?# - List sort method sorts in-place and only for lists# - sortred is a function and always returns a new list# - sorted function can accept any object. Sorting lists by word length http://www.daniweb.com/software-development/python/threads/54348/sorting-lists-by-word-length-how-do-i-do-it words = sorted(words, key = lambda str: len(str)) # Invoking..

Python 2024. 12. 4. 18:19

리스트는 문자열을 담고 있다.정해진 숫자의 리스트 요소로 잘라서 각각 출력한다. # 밑에 구현은 이해도 어렵고 C 스타일로 구현한 것으로 보인다. 24년이 된 지금 파이썬 답게 다시 한 번 구현해 본다.fruits = ['apple', 'banana', 'cherry', 'dragon fruit', 'Elderberry', 'Feijoa', 'Guava']divider = 4split_position = [(i, i+divider) for i in range(0, len(fruits), divider)]for start, end in split_position: print(fruits[start:end])# Output:# ['apple', 'banana', 'cherry', 'dragon frui..

Python 2024. 12. 3. 20:30

# re import re patterns = ['term1', 'term2'] text = "This is a string with term1, but not the other term" if re.search('hello', 'hello world'): print("Match was found.")else: print("No Match was found.") match = re.search(patterns[0], text) print(match.start())print(match.end()) split_term = '@' phrase = 'What is your email, is it hello@gmail.com?' print(re.split(split_term, phrase)) print(re.fi..

Python 2024. 12. 3. 13:15

"""Box print""" def boxPrint(symbol, w, h): print(symbol * w)  for i in range(h -1): print(symbol + (' ' * (w - 2) + symbol))  print(symbol * w) boxPrint('*', 15, 5) # 결과  # f-strings formatting (Python 3.6+)# ====================# - Formatted string literals (i.e., f-strings) provide a way# to embed expressions inside string literals, using a minimal# syntax.# - It works by adding a 'f' char at..

Python 2024. 12. 3. 10:13

# collections.defaultdict# =======================# A dictionary that returns a default value if the key has# not been set yet.# Simplifies code when dealing with missing dictionary keysfrom collections import defaultdictdd = defaultdict(int) # Default value is 0print(dd)dd['apple'] = 1 # Output: 1dd['banana'] += 2 # Output: 2print(dd)print(dd['orange']) # Output: 0 (default value)# 결과defaultdic..

Python 2024. 12. 3. 08:46

# Recursion - my versiondef split_str(s): # Base Case if len(s) == 0:  return print(s[:1]) return split_str(s[1:]) split_str('hello') # 결과hello  # Recursion Sumdef recur_sum(n): # Base Case if n == 0: return 0 else: return n + recur_sum(n - 1) print(recur_sum(4)) # 결과10 # Recursion Sum 2def recur_sum2(n): if len(str(n)) == 1: return n else: return n % 10 + recur_sum2(n // 10) print(recur_sum2(43..

Python 2024. 12. 2. 22:27