Python · Theory

finally

Theory

65/268

finally

finally runs cleanup whether an error happened or not. Close a file, release a lock, reset a flag. try: risky. except: handle. finally: cleanup. For files, with open(...) as f: often replaces manual finally. still learn finally for custom cleanup.

Almost always runs (rare interpreter-exit edges). Viva: finally vs with — with is nicer for files; finally is the general cleanup keyword.

Output — Cannot divide then finally always. finally still runs after except.

Exam tip

finally vs with-statement for files.

Example

# finally
try:
    print(10 / 0)
except ZeroDivisionError:
    print("Cannot divide")
finally:
    print("finally always")

Output: Cannot divide then finally always. finally still runs after except.

Short notes

DefCleanup always.
UseClose resources.
Rememberwith often simpler for files.

Python · Theory

finally

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Theory

65/268

finally

Almost always runs (rare interpreter-exit edges). Viva: finally vs with — with is nicer for files; finally is the general cleanup keyword.

Output — Cannot divide then finally always. finally still runs after except.

Exam tip

finally vs with-statement for files.

Example

# finally
try:
    print(10 / 0)
except ZeroDivisionError:
    print("Cannot divide")
finally:
    print("finally always")

Output: Cannot divide then finally always. finally still runs after except.

Short notes

DefCleanup always.
UseClose resources.
Rememberwith often simpler for files.

finally

Example

Short notes

Questions

finally

Example

Short notes

Questions