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Diffstat (limited to 'Doc')
| -rw-r--r-- | Doc/tut/tut.tex | 22 |
1 files changed, 11 insertions, 11 deletions
diff --git a/Doc/tut/tut.tex b/Doc/tut/tut.tex index 1fb661d..73222ff 100644 --- a/Doc/tut/tut.tex +++ b/Doc/tut/tut.tex @@ -2122,7 +2122,7 @@ associated with that key is forgotten. It is an error to extract a value using a non-existent key. The \method{keys()} method of a dictionary object returns a list of all -the keys used in the dictionary, in random order (if you want it +the keys used in the dictionary, in arbitrary order (if you want it sorted, just apply the \method{sort()} method to the list of keys). To check whether a single key is in the dictionary, use the \method{has_key()} method of the dictionary. @@ -2231,8 +2231,8 @@ pear \section{More on Conditions \label{conditions}} -The conditions used in \code{while} and \code{if} statements above can -contain other operators besides comparisons. +The conditions used in \code{while} and \code{if} statements can +contain any operators, not just comparisons. The comparison operators \code{in} and \code{not in} check whether a value occurs (does not occur) in a sequence. The operators \code{is} and @@ -2247,11 +2247,11 @@ whether \code{a} is less than \code{b} and moreover \code{b} equals Comparisons may be combined by the Boolean operators \code{and} and \code{or}, and the outcome of a comparison (or of any other Boolean -expression) may be negated with \code{not}. These all have lower -priorities than comparison operators again; between them, \code{not} has -the highest priority, and \code{or} the lowest, so that -\code{A and not B or C} is equivalent to \code{(A and (not B)) or C}. Of -course, parentheses can be used to express the desired composition. +expression) may be negated with \code{not}. These have lower +priorities than comparison operators; between them, \code{not} has +the highest priority and \code{or} the lowest, so that +\code{A and not B or C} is equivalent to \code{(A and (not B)) or C}. +As always, parentheses can be used to express the desired composition. The Boolean operators \code{and} and \code{or} are so-called \emph{short-circuit} operators: their arguments are evaluated from @@ -2307,12 +2307,12 @@ same types: Note that comparing objects of different types is legal. The outcome is deterministic but arbitrary: the types are ordered by their name. Thus, a list is always smaller than a string, a string is always -smaller than a tuple, etc. Mixed numeric types are compared according -to their numeric value, so 0 equals 0.0, etc.\footnote{ +smaller than a tuple, etc. \footnote{ The rules for comparing objects of different types should not be relied upon; they may change in a future version of the language. -} +} Mixed numeric types are compared according to their numeric value, so +0 equals 0.0, etc. \chapter{Modules \label{modules}} |