Single-element tuple in Python - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ Predict Output

intermediate

Output of single-element tuple creation

What is the output of this Python code?

Python

t = (5)
print(type(t))

A <class 'tuple'>

B SyntaxError

C <class 'int'>

D <class 'list'>

💡 Hint

Remember how Python treats parentheses without a comma.

Parentheses alone do not create a tuple. Without a comma, (5) is just the number 5 in parentheses, so its type is int.

❓ Predict Output

intermediate

Correct way to create a single-element tuple

What is the output of this code?

Python

t = (5,)
print(type(t))

A SyntaxError

B <class 'int'>

C <class 'list'>

D <class 'tuple'>

💡 Hint

Look for the comma inside the parentheses.

A single-element tuple requires a trailing comma. (5,) is a tuple with one element.

❓ Predict Output

advanced

Output of tuple unpacking with single-element tuple

What is the output of this code?

Python

t = (42,)
x, = t
print(x)

A (42,)

B 42

C TypeError

D SyntaxError

💡 Hint

Unpacking a single-element tuple assigns the element to the variable.

The comma after x means unpacking expects one element. x gets 42, so print(x) outputs 42.

❓ Predict Output

advanced

Difference between parentheses and tuple with one element

What is the output of this code?

Python

print(type((7)))
print(type((7,)))

A <class 'int'>\n<class 'tuple'>

B <class 'tuple'>\n<class 'int'>

C <class 'tuple'>\n<class 'tuple'>

D SyntaxError

💡 Hint

Check the comma in the second print statement.

Without a comma, (7) is just 7, an int. With a comma, (7,) is a tuple.

🧠 Conceptual

expert

Why is the comma required for single-element tuples?

Why does Python require a comma to create a single-element tuple like (5,)?

A Because parentheses alone are used for grouping expressions, not tuple creation.

B Because Python does not support tuples with one element.

C Because the comma is optional and only used for readability.

D Because the comma converts the number into a string inside the tuple.

💡 Hint

Think about how parentheses work in math expressions.

Parentheses group expressions, so (5) is just 5 grouped. The comma tells Python to make a tuple.