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Find and Fix Mistakes in Python Operators – Practice with Solutions

Sharpen your Python skills by identifying and correcting mistakes in operator usage. This hands-on practice guide covers common errors in arithmetic, logical, and comparison operators with clear solutions.

Topic: operators

🧪 Fix & Find Questions

🟢 Beginner Fix & Find

  1. Fix the incorrect exponentiation operation: 

    result = 2 ^ 3
print(result)

    Hint: 💡 Python uses a different operator for exponentiation than some other languages.

    🔍 View Issue & Fixed Solution

    Issue: The caret (^) is a bitwise XOR operator, not exponentiation.

    ✅ Fixed Solution

    result = 2 ** 3
print(result)

  2. Fix the augmented assignment operation: 

    count = 5
count =+ 2
print(count)

    Hint: 💡 The order of characters in augmented assignment matters.

    🔍 View Issue & Fixed Solution

    Issue: <b>=+</b> is not a valid operator (it's assigning positive 2, not adding).

    ✅ Fixed Solution

    count = 5
count += 2
print(count)

  3. Fix the membership test: 

    name = "Alice"
if name in ["Bob", "Charlie", "Dave"]:
    print("Found")

    Hint: 💡 The code works but doesn't match the likely intention.

    🔍 View Issue & Fixed Solution

    Issue: Testing for "Alice" in a list that doesn't contain it.

    ✅ Fixed Solution

    name = "Alice"
if name in ["Alice", "Bob", "Charlie"]:
    print("Found")

🟡 Intermediate Fix & Find

  1. Fix the floating-point division issue: 

    average = (3 + 5 + 2) / 0
print(average)

    Hint: 💡 Division by zero is mathematically undefined.

    🔍 View Issue & Fixed Solution

    Issue: Attempting to divide by zero will raise a ZeroDivisionError.

    ✅ Fixed Solution

    average = (3 + 5 + 2) / 3  # Using correct divisor
print(average)

  2. Fix the chained comparison: 

    x = 5
if 1 < x > 10:
    print("In range")

    Hint: 💡 Chained comparisons must express a consistent relationship.

    🔍 View Issue & Fixed Solution

    Issue: The condition can never be True (x cannot be both >1 and >10).

    ✅ Fixed Solution

    x = 5
if 1 < x < 10:
    print("In range")

  3. Fix the logical operation: 

    is_valid = True
is_active = False
if is_valid and is_active or:
    print("Access granted")

    Hint: 💡 The 'or' operator requires a second operand.

    🔍 View Issue & Fixed Solution

    Issue: Incomplete logical expression after 'or'.

    ✅ Fixed Solution

    is_valid = True
is_active = False
if is_valid and is_active:
    print("Access granted")

  4. Fix the identity comparison: 

    x = [1, 2, 3]
y = [1, 2, 3]
if x is y:
    print("Same object")

    Hint: 💡 'is' checks for object identity, not equality.

    🔍 View Issue & Fixed Solution

    Issue: Two different list objects with same values.

    ✅ Fixed Solution

    x = [1, 2, 3]
y = [1, 2, 3]
if x == y:
    print("Equal values")

🔴 Advanced Fix & Find

  1. Fix the bitwise operation: 

    flags = 0b1010
mask = 0b1100
result = flags and mask
print(bin(result))

    Hint: 💡 This is using logical AND instead of bitwise AND.

    🔍 View Issue & Fixed Solution

    Issue: 'and' is a boolean operator, not bitwise.

    ✅ Fixed Solution

    flags = 0b1010
mask = 0b1100
result = flags & mask
print(bin(result))

  2. Fix the operation to correctly calculate the average: 

    a, b, c = 10, 20, 30
average = a + b + c / 3
print(average)

    Hint: 💡 Division has higher precedence than addition.

    🔍 View Issue & Fixed Solution

    Issue: Only 'c' is being divided by 3 due to precedence rules.

    ✅ Fixed Solution

    a, b, c = 10, 20, 30
average = (a + b + c) / 3
print(average)

📚 Related Resources

🧠 Practice & Progress