text = 'Python'print(text)print(len(text))print(text[0])print(len(''))

text = 'café'print(text)print(len(text))print(text[-1])print('🍌')

print("Hello 'Python'")print('Hello "Python"')print('Hello \'Python\'')

print('Hello 'Python'')

text = 'Hello\nWorld'print(text)print(repr(text))

text = '*\t*\n**\t**\n***\t***'print(text)

text = """Thisisamultiline string"""print(text)print(repr(text))

print('C:\\some\name')print(r'C:\some\name')

description = 'immutable'message = 'Strings are ' + description + ' at all times'print(message)

message = ('Vigorous writing is concise. '           'Every word should contribute.')print(message)first = 'Py'second = 'thon'print(first + second)

print('Ha' * 3)print(3 * 'un' + 'ium')print(repr('Ha' * 0))print(repr('Ha' * -2))

text = "You miss all shots you don't take"for index in [0, -1, -10, 10]:    print(index, repr(text[index]))

text = 'dirk'for index in range(len(text)):    if text[index] == 'i' or text[index] == 'u':        print('Found i or u')        breakfor char in text:    if char == 'i' or char == 'u':        print('Found i or u')        break

word = input('Word: ')times = int(input('Enthusiasm (1-10): '))for char in word:    print('Give me a ' + char + '! ' + char)print('What does that spell?')print((word + '!!! ') * times)

print('a' in 'program')print('at' not in 'battle')print('battle' in 'at')

word = input('Uppercase word: ')an_letters = 'AEFHILMNORSX'for char in word:    article = 'a'    if char in an_letters:        article = 'an'    print('Give me ' + article + ' ' + char + '! ' + char)print(word, '!!!')

text = "You miss all shots you don't take"print(text[13:17])print(text[4:])print(text[:3])

text = "You miss all shots you don't take"print(text[-4:])print(text[-10:-5])print(text[-10:])

text = "You miss all shots you don't take"print(text[1:10:1], text[1:10:2], sep=" | ")print(text[1:10:3])print(text[::3])

text = "You miss all shots you don't take"print(text[10:1:-1])print(text[10:1:-2])print(text[::-1])

text = 'Python'print(text[:100])print(repr(text[100:]))

text = 'Python'print(text[100])

print('Apple' == 'Apple')print('Apple' != 'Apple')print('Apple' < 'Apple')print('Apple' <= 'Apple')print('cat' < 'car')print('HKU' < 'CUHK')

def is_palindrome(text):    return text == text[::-1]print(is_palindrome('test'))print(is_palindrome('madam'))print(is_palindrome('Anna'))

def double(number):    return number * 2def show_double(number):    print(number * 2)print(double(5) + 1)result = show_double(5)print(result)

def is_palindrome(text):    index = 0    for char in reversed(text):        if char != text[index]:            return False        index += 1    return Trueprint(is_palindrome('madam'))print(is_palindrome('Anna'))

print(ord('a'), ord('A'))print(ord('1'), ord('2'))print(ord('é'))

print(chr(65))print(chr(ord('é')))for number in range(65, 91):    print(chr(number), end=' ')print()

print('HKU' == "HKU")print('HKU' == 'HkU')print(ord('K'), ord('k'))print('HKU' < 'HkU')

name = 'DiRk'print(name.capitalize())print(name.upper())print(name.lower())print(name)

text = 'red blue red'print(text.split())print(text.find('blue'))print(text.find('green'))print(text.count('red'))

filename = 'report.csv'print(filename.endswith('.csv'))address = 'https://hku.hk'print(address.startswith('https://'))print('report.csv.bak'.endswith('.csv'))

print('HKU1330'.isalnum())print('HKU'.isalpha())print('1330'.isdecimal())print('-3'.isdecimal())print('3.5'.isdecimal())print(''.isalpha())

text = '  Hello HKU  'print(repr(text.strip()))print(repr(text.replace('HKU', 'Python')))print(repr(text))

text = 'change me'text[0] = 'a'

text = 'delete me'del text[1]

text = "You miss all shots you don't take"changed = text[:29] + text[30:]print(changed)print(text)

text = "You miss all shots you don't take"changed = text[:29] + 'f' + text[30:]print(changed)print(text)

text = 'Test'letters = list(text)letters[1] = 'E'changed = ''.join(letters)print(letters)print(changed)print(text)

name = '  Ada   Lovelace  'words = name.split()cleaned = ' '.join(words)print(words)print(repr(cleaned))

name = 'Dirk'student = {'name': 'Dirk', 'age': 21}print(f'My name is {name}')print(f"{student['name']} is {student['age']} years old")

name = 'Dirk'print(f'|{name:<20}|')print(f'|{name:^20}|')print(f'|{name:>20}|')print(f'|{name:0>20}|')

for number in [5, 9, 10, 15]:    print(f'{number:03}')

pi = 3.14159265print(f'Pi is {pi:.4f}')print(pi)

plain_text = 'hello'key = 11print(plain_text)print(key)

plain_text = 'hello'key = 11alphabet = 'abcdefghijklmnopqrstuvwxyz'shifted = alphabet[key:] + alphabet[:key]print(alphabet)print(shifted)

plain_text = 'hello'key = 11alphabet = 'abcdefghijklmnopqrstuvwxyz'shifted = alphabet[key:] + alphabet[:key]cipher_text = ''for char in plain_text:    index = ord(char) - ord('a')    cipher_text += shifted[index]print(cipher_text)

alphabet = 'abcdefghijklmnopqrstuvwxyz'cipher_text = 'spwwz'for key in range(26):    shifted = alphabet[-key:] + alphabet[:-key]    plain_text = ''    for char in cipher_text:        plain_text += shifted[ord(char) - ord('a')]    print(f'{key:02}:{plain_text}', end='  ')

names = []while True:    new_name = input('Name (blank ends): ')    if new_name == '':        break    names.append(new_name)    print(names)

names = []for new_name in ['HKU', 'CUHK', 'HKUST']:    pos = 0    while pos < len(names):        if names[pos] > new_name:            break        pos += 1    names.insert(pos, new_name)    print(names)

names = []for new_name in ['HKU', 'CUHK', 'HKUST']:    pos = 0    while pos < len(names):        if names[pos] > new_name:            break        pos += 1    names.insert(pos, new_name)    print(names)

names = []for new_name in ['HKU', 'CUHK', 'HKUST']:    pos = 0    while pos < len(names):        if names[pos] > new_name:            break        pos += 1    names.insert(pos, new_name)    print(names)

names = []for new_name in ['HKU', 'CUHK', 'HKUST']:    pos = 0    while pos < len(names):        if names[pos] > new_name:            break        pos += 1    names.insert(pos, new_name)    print(names)

names = []for new_name in ['HKU', 'CUHK', 'HKUST']:    names.append(new_name)ordered = sorted(names)print(ordered)print(names)