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Diffstat (limited to 'Doc/library/stdtypes.rst')
| -rw-r--r-- | Doc/library/stdtypes.rst | 42 |
1 files changed, 25 insertions, 17 deletions
diff --git a/Doc/library/stdtypes.rst b/Doc/library/stdtypes.rst index 1ccc457..14ad15e 100644 --- a/Doc/library/stdtypes.rst +++ b/Doc/library/stdtypes.rst @@ -120,25 +120,24 @@ Notes: Comparisons =========== -.. index:: pair: chaining; comparisons - -There are eight comparison operations in Python. They all have the same -priority (which is higher than that of the Boolean operations). Comparisons can -be chained arbitrarily; for example, ``x < y <= z`` is equivalent to ``x < y and -y <= z``, except that *y* is evaluated only once (but in both cases *z* is not -evaluated at all when ``x < y`` is found to be false). - .. index:: + pair: chaining; comparisons pair: operator; comparison operator: == operator: < - operator: > operator: <= + operator: > operator: >= operator: != operator: is operator: is not +There are eight comparison operations in Python. They all have the same +priority (which is higher than that of the Boolean operations). Comparisons can +be chained arbitrarily; for example, ``x < y <= z`` is equivalent to ``x < y and +y <= z``, except that *y* is evaluated only once (but in both cases *z* is not +evaluated at all when ``x < y`` is found to be false). + This table summarizes the comparison operations: +------------+-------------------------+ @@ -248,6 +247,13 @@ and imaginary parts. builtin: int builtin: float builtin: complex + operator: + + operator: - + operator: * + operator: / + operator: // + operator: % + operator: ** Python fully supports mixed arithmetic: when a binary arithmetic operator has operands of different numeric types, the operand with the "narrower" type is @@ -368,7 +374,15 @@ modules. Bit-string Operations on Integer Types -------------------------------------- -.. _bit-string-operations: +.. index:: + triple: operations on; integer; types + pair: bit-string; operations + pair: shifting; operations + pair: masking; operations + operator: ^ + operator: & + operator: << + operator: >> Integers support additional operations that make sense only for bit-strings. Negative numbers are treated as their 2's complement value (this assumes a @@ -400,12 +414,6 @@ This table lists the bit-string operations sorted in ascending priority | ``~x`` | the bits of *x* inverted | | +------------+--------------------------------+----------+ -.. index:: - triple: operations on; integer; types - pair: bit-string; operations - pair: shifting; operations - pair: masking; operations - Notes: (1) @@ -1595,7 +1603,7 @@ set``. Being an unordered collection, sets do not record element position or order of insertion. Accordingly, sets do not support indexing, slicing, or other sequence-like behavior. -There are currently two builtin set types, :class:`set` and :class:`frozenset`. +There are currently two built-in set types, :class:`set` and :class:`frozenset`. The :class:`set` type is mutable --- the contents can be changed using methods like :meth:`add` and :meth:`remove`. Since it is mutable, it has no hash value and cannot be used as either a dictionary key or as an element of another set. |