遍歷整個列表：
For 循環：
- 使用列表項自動執行重複性任務。
- 示例： for magician in magicians: print(magician) .
magicians = ['Alice', 'David', 'carolina']
for magician in magicians:
print(magician)
>>
alice
david
carolina
迭代所有項：
- Loop 檢索並處理每個項目。
- 示例：在列表中列印每個魔術師的名字。
magicians = ['alice', 'david', 'carolina']
for magician in magicians:
print(f"{magician.title()}, that was a great trick!")
>>
Alice, that was a great trick!
David, that was a great trick!
Carolina, that was a great trick!
循環執行：
- 對每個列表項重複上述步驟。
- 示例：使用循環的個性化消息。
magicians = ['alice', 'david', 'carolina']
for magician in magicians:
print(f"{magician.title()}, that was a great trick!")
print(f"I can't wait to see your next trick, {magician.title()}.\n")
>>
Alice, that was a great trick!
I can't wait to see your next trick, Alice.
David, that was a great trick!
I can't wait to see your next trick, David.
Carolina, that was a great trick!
I can't wait to see your next trick, Carolina.
循環後操作：
- 循環後的代碼執行一次。
- 示例：在單獨消息後感謝所有魔術師。
magicians = ['alice', 'david', 'carolina']
for magician in magicians:
print(f"{magician.title()}, that was a great trick!")
print(f"I can't wait to see your next trick, {magician.title()}.\n")
print("Thank you, everyone. That was a great magic show!")
>>
Alice, that was a great trick!
I can't wait to see your next trick, Alice.
David, that was a great trick!
I can't wait to see your next trick, David.
Carolina, that was a great trick!
I can't wait to see your next trick, Carolina.
Thank you, everyone. That was a great magic show!
避免 Python 中的縮進錯誤
忘記縮進：
magicians = ['alice', 'david', 'carolina']
for magician in magicians:
print(magician) # Should be indented
#Error :
File "magicians.py", line 3
print(magician)
^
IndentationError: expected an indented block after 'for' statement on line 2
- 錯誤： IndentationError: expected an indented block after 'for' statement
- 修復：縮進 print（magician） 行。
忘記縮進額外的行：
for magician in magicians:
print(f"{magician.title()}, that was a great trick!")
print(f"I can't wait to see your next trick, {magician.title()}.\n") # Should be indented
#OutPut
Alice, that was a great trick!
David, that was a great trick!
Carolina, that was a great trick!
I can't wait to see your next trick, Carolina.
- 問題：只有最後一個魔術師會收到第二條消息，因為該行不在循環內。
- 修復：縮進第二個 print 語句。
不必要地縮進：
message = "Hello Python world!"
print(message) # Unnecessary indent
#Error :
File "hello_world.py", line 2
print(message)
^
IndentationError: unexpected indent
- 錯誤： IndentationError: unexpected indent
- 修復：刪除不必要的縮進。
在循環後縮進：
for magician in magicians:
print(f"{magician.title()}, that was a great trick!")
print(f"I can't wait to see your next trick, {magician.title()}.\n")
print("Thank you everyone, that was a great magic show!") # Should not be indented
>>
Alice, that was a great trick!
I can't wait to see your next trick, Alice.
Thank you everyone, that was a great magic show!
David, that was a great trick!
I can't wait to see your next trick, David.
Thank you everyone, that was a great magic show!
Carolina, that was a great trick!
I can't wait to see your next trick, Carolina.
Thank you everyone, that was a great magic show
- 問題：感謝信息是為每位魔術師列印的。
- 修復：取消縮進最後一個 print 語句。
忘記冒號：
for magician in magicians # Missing colon
print(magician)
#Error :
File "magicians.py", line 2
for magician in magicians
^
SyntaxError: expected ':'
- 錯誤：語法錯誤：應為「：」
- 修復：在 magicians 中為 magician 添加冒號。
