Python Errors: All in One Place

Every Python developer encounters errors, especially when starting out. Instead of being frustrated by them, treat errors as clues that help you understand how Python works.

1. SyntaxError: EOL while scanning string literal

EOL stands for End Of Line. Python reads your string from the opening quote and expects a matching closing quote on the same line. If it reaches the end of the line without finding one, it throws this error.

# ❌ Broken — closing quote missing
print("Hello, Parthi)

# ✅ Fixed
print("Hello, Parthi")

2. IndentationError: unexpected indent

Python uses whitespace to define structure, no curly braces. Every block (inside an if, a for, a function) must be indented consistently. An unexpected indent means a line has leading spaces where Python expected none.

# ❌ Broken — indented for no reason
name = "Parthi"
    print(name)

# ✅ Fixed — back at the base level
name = "Parthi"
print(name)

# ✅ Also valid — indented correctly inside a block
if name == "Parthi":
    print("Welcome!")

3. NameError: name '…' is not defined

Python evaluates names at runtime. If you reference a variable that hasn't been assigned yet or you've misspelled it, NameError occurs.

# ❌ Broken — used before assignment
print(total)
total = 100

# ❌ Broken — typo (underscore vs no underscore)
username = "parthi"
print(user_name)

# ✅ Fixed
total = 100
print(total)

username = "parthi"
print(username)

Errors happen to everyone; Keep going.

#Python