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Update debugging.md #474

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4 changes: 3 additions & 1 deletion docs/cheatsheet/debugging.md
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Original file line number Diff line number Diff line change
Expand Up @@ -138,7 +138,7 @@ Say you wrote a function to calculate the factorial of a number. In mathematics,
>>> def factorial(n):
... logging.debug('Start of factorial(%s)' % (n))
... total = 1
... for i in range(1, n + 1):
... for i in range(0, n + 1):
... total *= i
... logging.debug('i is ' + str(i) + ', total is ' + str(total))
... logging.debug('End of factorial(%s)' % (n))
Expand All @@ -159,6 +159,8 @@ Say you wrote a function to calculate the factorial of a number. In mathematics,
# 2015-05-23 16:20:12,684 - DEBUG - End of program
```

Using the log output, we can see that `for i in range(0, n + 1)` should have been `for i in range(1, n + 1)`.

## Logging Levels

Logging levels provide a way to categorize your log messages by importance. There are five logging levels, described in Table 10-1 from least to most important. Messages can be logged at each level using a different logging function.
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