Errors are not failures. They are Python telling you what to fix.
Direct answer
Read the last line of a Python error first: it names the error type and gives a clue. Then check the line number above it. Most beginner errors are typos, missing colons, wrong indentation or using a name before defining it.
The usual suspects
| Error | Typical cause | Fix |
|---|---|---|
SyntaxError | Missing colon, bracket or quote | Check the line and the one before it |
IndentationError | Inconsistent indentation | Use four spaces everywhere |
NameError | Misspelled or undefined name | Define it first, check spelling |
TypeError | Wrong type, such as adding a number to text | Convert with int() or str() |
IndexError | List position does not exist | Check the list length |
KeyError | Dictionary key missing | Use .get() or check the key |
ZeroDivisionError | Division by zero | Check the divisor |
Example
age = 25
print("Age: " + age) # TypeError
print("Age: " + str(age)) # fixed
A debugging habit
Read the message, find the line, form a guess, fix one thing, run again.
Where Teyro fits
Teyro's Python for Beginners course turns this into short lessons you can play in a few minutes a day. It has 120 lessons, and you can start free.
The bottom line
Every programmer sees these daily. Learning to read them is a core skill.
