Làm thế nào để bạn chọn một chữ cái trong một chuỗi trong python?
# Để lấy ba ký tự đầu tiên Show # Để lấy tất cả các ký tự bắt đầu từ chỉ số 0 # Để lấy tất cả các ký tự bắt đầu từ 0 đến chỉ số thứ 5 # Để lấy tất cả các ký tự của chuỗi Đưa ra một chuỗi, nhiệm vụ là chỉ trích xuất các ký tự chữ cái từ một chuỗi. Đưa ra dưới đây là một số phương pháp để giải quyết vấn đề đã cho Phương pháp số 1. Sử dụng lại. tách ra Python3
initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh0 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh1
initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh2 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh3 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh4 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh5 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh6_______0_______4 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh8
initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh9 initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw0 initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw1 initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw2 initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw3
initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw4 initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw5 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh4 initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw7 initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw8_______10_______9 initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw0 initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw1 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh4 initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw7 initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw8_______10_______9 initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw6
initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw7 initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw0 initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw1 ABGFDabcjw0 ABGFDabcjw1_______30_______2 ABGFDabcjw3 initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw0 initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw1 ABGFDabcjw6 ABGFDabcjw1_______30_______2 ABGFDabcjw9 Đầu ra initial string : 123()#$ABGFDabcjw abceddfgh first string result: A B G F D a b c j w second string result: a b c e d d f g h Phương pháp #2. Sử dụng lại. tìm tất cả Python3
ABGFDabcjw1 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh0 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh1
initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh2 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh3 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh4 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh5 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh6_______0_______4 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh8
initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh9 initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw0 initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw1 ABGFDabcjw abceddfgh4_______54_______5 ABGFDabcjw abceddfgh6 ABGFDabcjw abceddfgh7
initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw4 initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw5 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh4 initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw7 ABGFDabcjw abceddfgh2_______54_______3 initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw0 initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw1 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh4 initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw7_______54_______2_______54_______3 initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw6
initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw7 initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw0 initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw1 ABGFDabcjw0 ABGFDabcjw1_______30_______2 ABGFDabcjw3 initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw0 initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw1 ABGFDabcjw6 ABGFDabcjw1_______30_______2 ABGFDabcjw9 Đầu ra initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh Phương pháp #3. Sử dụng isalpha() Python3
initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh2 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh3 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh4 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh5
initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh01 initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw0_______10_______1 initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw2 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh05
initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw4 initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw5 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh4 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh09 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh10 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh11 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh12 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh13 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh14 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh15 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh16 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh17_______10_______5 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh4 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh20
initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw7 initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw0_______10_______1 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh24 ABGFDabcjw1 ABGFDabcjw2 ABGFDabcjw3 Đầu ra initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw Phương pháp #4. Không có bất kỳ phương thức dựng sẵn nào Python3
initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh2 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh3 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh4 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh5 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh35 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh4 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh37 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh38 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh4 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh40 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh41 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh4_______0_______35 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh44 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh38 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh01 initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw0 initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw1 initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw2 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh05
initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw4 initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw5 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh4 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh09 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh10 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh11 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh12 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh13 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh14 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh15 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh11 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh12 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh63 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh17_______10_______5 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh44 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh4 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh11
initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw7 initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw0 initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw1 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh24 ABGFDabcjw1 ABGFDabcjw2 ABGFDabcjw3 Đầu ra initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw Phương pháp 5. Sử dụng phương pháp hiểu danh sách Python3initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh3 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh4 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh5 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh41 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh4 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh81 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh82 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh4 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh84_______0_______10 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh11 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh12 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh3 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh15 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh11 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh12 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh92 initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw0_______0_______94 Đầu ra ABGFDabcjw Phương pháp 6. Sử dụng hàm liệt kê Python3initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh3 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh4 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh5 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh41 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh4 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh81 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh82 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh4 initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw03 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh10 initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw05 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh12 initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw07 initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw08 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh15 initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw10 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh12 initial string : 123()#$ABGFDabcjw abceddfgh first string result: ABGFDabcjw second string result: abceddfgh92 initial string : 123()#$ABGFDabcjw first result: ABGFDabcjw0_______0_______94 Đầu ra ABGFDabcjw Phương pháp số 7. Sử dụng bộ lọc và lambda Hàm bộ lọc lấy một hàm và một đối tượng dạng danh sách làm đầu vào và trả về một danh sách các phần tử từ đối tượng đầu vào mà hàm trả về True. Trong trường hợp này, hàm là lambda x. x. isalpha(), trả về True cho bất kỳ ký tự chữ cái nào và Sai cho bất kỳ ký tự không phải chữ cái nào. Phương thức nối sau đó được sử dụng để nối các ký tự thành một chuỗi |