diff options
| -rw-r--r-- | Doc/library/datetime.rst | 2 | ||||
| -rw-r--r-- | Doc/library/random.rst | 7 |
2 files changed, 8 insertions, 1 deletions
diff --git a/Doc/library/datetime.rst b/Doc/library/datetime.rst index 8296a4de4e..73b3901ffb 100644 --- a/Doc/library/datetime.rst +++ b/Doc/library/datetime.rst @@ -30,7 +30,7 @@ set to an instance of a subclass of the abstract :class:`tzinfo` class. These :class:`tzinfo` objects capture information about the offset from UTC time, the time zone name, and whether Daylight Saving Time is in effect. Note that only one concrete :class:`tzinfo` class, the :class:`timezone` class, is supplied by the -:mod:`datetime` module. The :class:`timezone` class can reprsent simple +:mod:`datetime` module. The :class:`timezone` class can represent simple timezones with fixed offset from UTC such as UTC itself or North American EST and EDT timezones. Supporting timezones at whatever level of detail is required is up to the application. The rules for time adjustment across the diff --git a/Doc/library/random.rst b/Doc/library/random.rst index 3040411bb0..2b10e6eb5d 100644 --- a/Doc/library/random.rst +++ b/Doc/library/random.rst @@ -169,6 +169,7 @@ be found in any statistics text. The end-point value ``b`` may or may not be included in the range depending on floating-point rounding in the equation ``a + (b-a) * random()``. + .. function:: triangular(low, high, mode) Return a random floating point number *N* such that ``low <= N <= high`` and @@ -197,6 +198,12 @@ be found in any statistics text. Gamma distribution. (*Not* the gamma function!) Conditions on the parameters are ``alpha > 0`` and ``beta > 0``. + The probability distribution function is:: + + x ** (alpha - 1) * math.exp(-x / beta) + pdf(x) = -------------------------------------- + math.gamma(alpha) * beta ** alpha + .. function:: gauss(mu, sigma) |