Tuple methods in Python - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to find the number of times 3 appears in the tuple.

Python

numbers = (1, 3, 5, 3, 7, 3)
count = numbers.[1](3)
print(count)

Drag options to blanks, or click blank then click option'

Acount

Bfind

Clocate

Dindex

Attempts:

3 left

💡 Hint

Common Mistakes

Using index() instead of count().

Trying to use len() on the tuple with a value.

The count() method returns how many times a value appears in a tuple.

2fill in blank

medium

Complete the code to find the first position of the value 5 in the tuple.

Python

values = (2, 4, 5, 6, 5)
position = values.[1](5)
print(position)

Drag options to blanks, or click blank then click option'

Afind

Bcount

Cindex

Dlocate

Attempts:

3 left

💡 Hint

Common Mistakes

Using count() instead of index().

Trying to use find() which is not a tuple method.

The index() method returns the first position of a value in a tuple.

3fill in blank

hard

Fix the error in the code to correctly find the index of 10 in the tuple.

Python

data = (10, 20, 30)
pos = data.[1](10)
print(pos)

Drag options to blanks, or click blank then click option'

Aindex

Bfind

Csearch

Dlocate

Attempts:

3 left

💡 Hint

Common Mistakes

Using find() which is a string method, not a tuple method.

Trying to use search() or locate() which do not exist.

The correct method to find the index of a value in a tuple is index(). Methods like find() do not exist for tuples.

4fill in blank

hard

Fill both blanks to create a dictionary of word lengths for words longer than 3 characters.

Python

words = ('apple', 'bat', 'carrot', 'dog')
lengths = {word: [1] for word in words if len(word) [2] 3}
print(lengths)

Drag options to blanks, or click blank then click option'

Alen(word)

B<=

C>

Dword

Attempts:

3 left

💡 Hint

Common Mistakes

Using <= instead of > in the condition.

Putting the word itself instead of its length in the dictionary value.

Use len(word) to get the length and > to filter words longer than 3 characters.

5fill in blank

hard

Fill all three blanks to create a dictionary with uppercase keys and values for positive numbers.

Python

data = {'a': 1, 'b': -2, 'c': 3}
result = [1]: [2] for k, v in data.items() if v [3] 0
print(result)

Drag options to blanks, or click blank then click option'

Ak.upper()

Bv

C>

Dk

Attempts:

3 left

💡 Hint

Common Mistakes

Using the original key instead of uppercase key.

Using >= or < instead of >.

Using the key as value instead of the actual value.

Use k.upper() for uppercase keys, v for values, and > to filter positive values.

Practice

1. Which tuple method tells you how many times a specific value appears in the tuple?

easy

A. count()

B. index()

C. find()

D. length()

Solution

1. Step 1: Understand tuple methods

   The count() method returns how many times a value appears in a tuple.

2. Step 2: Compare with other methods

   index() finds the position, find() and length() are not tuple methods.

3. Final Answer:

   count() -> Option A

4. Quick Check:

   count() = count occurrences [OK]

Hint: count() counts occurrences of a value in tuple [OK]

Common Mistakes:

• Confusing count() with index()
• Using find() which is for strings
• Thinking length() works on tuples

2. Which of the following is the correct syntax to find the first index of value 5 in tuple t = (1, 5, 3, 5)?

easy

A. t.find(5)

B. t.count(5)

C. index(t, 5)

D. t.index(5)

Solution

1. Step 1: Recall tuple index method syntax

   The correct syntax is tuple_variable.index(value).

2. Step 2: Check options

   Only t.index(5) matches the correct syntax.

3. Final Answer:

   t.index(5) -> Option D

4. Quick Check:

   tuple.index(value) = correct syntax [OK]

Hint: Use tuple.index(value) to find first position [OK]

Common Mistakes:

• Using count() instead of index()
• Trying to call find() on tuple
• Calling index() as a standalone function

3. What is the output of this code?

t = (2, 4, 2, 6, 2)
print(t.count(2))
print(t.index(6))

medium

A. 2 and 4

B. 3 and 3

C. 3 and 4

D. Error

Solution

1. Step 1: Count occurrences of 2 in tuple

   Value 2 appears 3 times in t.

2. Step 2: Find index of 6 in tuple

   6 is at position 3 (0-based index).

3. Final Answer:

   3 and 4 -> Option C

4. Quick Check:

   count(2)=3, index(6)=3 [OK]

Hint: count() returns total, index() returns first position [OK]

Common Mistakes:

• Counting index as 4 instead of 3
• Mixing count and index results
• Expecting count to return index

4. What is wrong with this code?

t = (1, 2, 3)
print(t.index(4))

medium

A. Raises ValueError because 4 is not in tuple

B. No error, prints -1

C. SyntaxError due to wrong method

D. Returns None

Solution

1. Step 1: Check if 4 is in tuple

   Value 4 is not present in t.

2. Step 2: Understand index() behavior when value missing

   index() raises ValueError if value is not found.

3. Final Answer:

   Raises ValueError because 4 is not in tuple -> Option A

4. Quick Check:

   index() missing value = ValueError [OK]

Hint: index() errors if value not found, no -1 return [OK]

Common Mistakes:

• Expecting -1 when value not found
• Thinking index() returns None
• Confusing with list find() method

5. Given t = (1, 7, 3, 7, 5), which code finds the index of the second occurrence of 7?

hard

A. t.index(7, 1)

B. t.index(7, t.index(7) + 1)

C. t.count(7) - 1

D. t.index(7) + 1

Solution

1. Step 1: Find first index of 7

   t.index(7) returns 1, the first occurrence.

2. Step 2: Use start parameter to find second occurrence

   Calling t.index(7, 2) starts search after first 7, returning index 3.

3. Step 3: Combine steps in one expression

   t.index(7, t.index(7) + 1) finds second occurrence correctly.

4. Final Answer:

   t.index(7, t.index(7) + 1) -> Option B

5. Quick Check:

   Use index(value, start) for next occurrence [OK]

Hint: Use index(value, start) to find later occurrences [OK]

Common Mistakes:

• Using count() instead of index()
• Not adding 1 to start index
• Assuming index() returns all positions