How to Fix TypeError unsupported operand type in Python With Examples

 

What Is This Error?

TypeError: unsupported operand type(s) happens when you try to perform an operation (like +, *, /) between incompatible types — for example, adding an integer to a string.

Common Examples & Fixes:

1. Adding int and str

Incorrect:

age = 20
print("I am " + age)

Fix:

print("I am " + str(age))

2. Multiplying list by float

Incorrect:

data = [1, 2, 3]
result = data * 2.5

Fix:

result = data * 2

3. Adding list and int

Incorrect:

numbers = [1, 2, 3] + 4

Fix:

numbers = [1, 2, 3] + [4]

4. Dividing str and int

Incorrect:

result = "100" / 2

Fix:

result = int("100") / 2

Pro Tips:

• Use type(variable) to debug type issues.
• Convert data types explicitly using int(), str(), float(), etc.
• Use static type checkers like mypy for early error detection.