SyntaxError: invalid syntax
SyntaxError: unexpected EOF while parsing
SyntaxError: EOL while scanning string literal

Python found code that doesn’t follow its grammar rules. The error points to where Python got confused, but the actual mistake is often on the line before.

Fix 1: Missing Colon

# ❌ Forgot colon after if/for/def/class
if x > 5
    print("big")

# ✅ Add the colon
if x > 5:
    print("big")

Fix 2: Mismatched Brackets

# ❌ Unclosed parenthesis
result = (1 + 2 * (3 + 4)
print(result)  # 💥 Error points here but problem is above

# ✅ Close all brackets
result = (1 + 2) * (3 + 4)

Fix 3: Indentation Error

# ❌ Mixed tabs and spaces
def greet():
    print("hello")
	print("world")  # 💥 Tab instead of spaces

# ✅ Use consistent indentation (4 spaces)
def greet():
    print("hello")
    print("world")

Fix 4: Unclosed String

# ❌ String not closed
message = "Hello world
print(message)

# ✅ Close the string
message = "Hello world"

# For multi-line strings, use triple quotes
message = """Hello
world"""

Fix 5: Using = Instead of ==

# ❌ Assignment in condition
if x = 5:  # 💥 Should be ==
    print("five")

# ✅ Use == for comparison
if x == 5:
    print("five")

Fix 6: Python 2 vs 3 Syntax

# ❌ Python 2 print statement
print "hello"  # 💥 In Python 3

# ✅ Python 3 print function
print("hello")

Debugging Tips

# The error line number is where Python NOTICED the problem
# The actual mistake is often 1-2 lines ABOVE
# Look for: missing colons, unclosed brackets, unclosed strings

Related resources

• Python indentation error fix
• Python EOL string literal fix
• Python cheat sheet