Py Exceptions — Free Python Tutorial
Learn Py Exceptions in Python with a free, beginner-friendly tutorial, examples and practice for Indian students on Syllab.in.
TL;DR: Learn Py Exceptions in Python with a free, beginner-friendly tutorial, examples and practice for Indian students on Syllab.in.
Written & reviewed by the Syllab.in Academic Team (CBSE/NCERT subject experts) · Updated
Py Exceptions in Python
An exception is an error that occurs during program execution. Without handling, it crashes your program. Python's try/except block lets you catch errors and respond gracefully.
Common exceptions: ValueError (wrong type conversion), ZeroDivisionError, IndexError (list out of range), KeyError (dict key missing), FileNotFoundError, TypeError. You can also raise your own exceptions.
The finally block always runs, even if an exception occurred — perfect for cleanup (closing files, database connections). The else block runs only if no exception occurred.
Py Exceptions — Syntax
try:
# risky code
except ExceptionType as e:
# handle error
else:
# runs only if no error
finally:
# always runs
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