Python- Day 10- Working With List

Looping Through an Entire List:

For Loop:

• Automates repetitive tasks with list items.
• Example: for magician in magicians: print(magician).

magicians = ['alice', 'david', 'carolina']
 for magician in magicians:
    print(magician)

>>

alice
 david
 carolina

Iterate All Items:

• Loop retrieves and processes each item.
• Example: Print each magician’s name in a list.

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!

Loop Execution:

• Repeat the steps for each list item.
• Example: Personalized messages using loops.

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.

Post-Loop Action:

• Code after loop executes once.
• Example: Thanking all magicians after individual messages.

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!

Avoiding Indentation Errors in Python

Forgetting to Indent:

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

• Error: IndentationError: expected an indented block after 'for' statement
• Fix: Indent the print(magician) line.

Forgetting to Indent Additional Lines:

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.

• Issue: Only the last magician gets the second message because the line is not inside the loop.
• Fix: Indent the second print statement.

Indenting Unnecessarily:

message = "Hello Python world!"
    print(message)  # Unnecessary indent

#Error : 

File "hello_world.py", line 2
    print(message)
    ^
 IndentationError: unexpected indent

• Error: IndentationError: unexpected indent
• Fix: Remove the unnecessary indent.

Indenting After the Loop:

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

• Issue: The thank you message is printed for each magician.
• Fix: Unindent the last print statement.

Forgetting the Colon:

for magician in magicians  # Missing colon
    print(magician)


#Error : 

 File "magicians.py", line 2
    for magician in magicians
                             ^
 SyntaxError: expected ':'

• Error: SyntaxError: expected ':'
• Fix: Add the colon after for magician in magicians.

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