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added table of precedences

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Guido van Rossum 1995-03-17 15:59:52 +00:00
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51
Doc/ref/ref5.tex
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@ -705,3 +705,54 @@ tuple, but rather yields the value of that expression (condition).
(To create an empty tuple, use an empty pair of parentheses:
\verb@()@.)
\section{Summary}
The following table summarizes the operator precedences in Python,
from lowest precedence (least binding) to highest precedence (most
binding). Operators in the same box have the same precedence. Unless
the syntax is explicitly given, operators are binary. Operators in
the same box group left to right (except for comparisons, which
chain from left to right --- see above).
\begin{center}
\begin{tabular}{|c|c|}
\hline
\code{or} & Boolean OR \\
\hline
\code{and} & Boolean AND \\
\hline
\code{not} \var{x} & Boolean NOT \\
\hline
\code{in}, \code{not} \code{in} & Membership tests \\
\code{is}, \code{is} \code{not} & Identity tests \\
\code{<}, \code{<=}, \code{>}, \code{>=}, \code{<>}, \code{!=}, \code{=} &
Comparisons \\
\hline
\code{|} & Bitwise OR \\
\hline
\code{\^} & Bitwise XOR \\
\hline
\code{\&} & Bitwise AND \\
\hline
\code{<<}, \code{>>} & Shifts \\
\hline
\code{+}, \code{-} & Addition and subtraction \\
\hline
\code{*}, \code{/}, \code{\%} & Multiplication, division, remainder \\
\hline
\code{+\var{x}}, \code{-\var{x}} & Positive, negative \\
\code{\~\var{x}} & Bitwise not \\
\hline
\code{\var{x}.\var{attribute}} & Attribute reference \\
\code{\var{x}[\var{index}]} & Subscription \\
\code{\var{x}[\var{index}:\var{index}]} & Slicing \\
\code{\var{f}(\var{arguments}...)} & Function call \\
\hline
\code{(\var{expressions}\ldots)} & Binding or tuple display \\
\code{[\var{expressions}\ldots]} & List display \\
\code{\{\var{key}:\var{datum}\ldots\}} & Dictionary display \\
\code{`\var{expression}\ldots`} & String conversion \\
\hline
\end{tabular}
\end{center}

51
Doc/ref5.tex
View file

@ -705,3 +705,54 @@ tuple, but rather yields the value of that expression (condition).
(To create an empty tuple, use an empty pair of parentheses:
\verb@()@.)
\section{Summary}
The following table summarizes the operator precedences in Python,
from lowest precedence (least binding) to highest precedence (most
binding). Operators in the same box have the same precedence. Unless
the syntax is explicitly given, operators are binary. Operators in
the same box group left to right (except for comparisons, which
chain from left to right --- see above).
\begin{center}
\begin{tabular}{|c|c|}
\hline
\code{or} & Boolean OR \\
\hline
\code{and} & Boolean AND \\
\hline
\code{not} \var{x} & Boolean NOT \\
\hline
\code{in}, \code{not} \code{in} & Membership tests \\
\code{is}, \code{is} \code{not} & Identity tests \\
\code{<}, \code{<=}, \code{>}, \code{>=}, \code{<>}, \code{!=}, \code{=} &
Comparisons \\
\hline
\code{|} & Bitwise OR \\
\hline
\code{\^} & Bitwise XOR \\
\hline
\code{\&} & Bitwise AND \\
\hline
\code{<<}, \code{>>} & Shifts \\
\hline
\code{+}, \code{-} & Addition and subtraction \\
\hline
\code{*}, \code{/}, \code{\%} & Multiplication, division, remainder \\
\hline
\code{+\var{x}}, \code{-\var{x}} & Positive, negative \\
\code{\~\var{x}} & Bitwise not \\
\hline
\code{\var{x}.\var{attribute}} & Attribute reference \\
\code{\var{x}[\var{index}]} & Subscription \\
\code{\var{x}[\var{index}:\var{index}]} & Slicing \\
\code{\var{f}(\var{arguments}...)} & Function call \\
\hline
\code{(\var{expressions}\ldots)} & Binding or tuple display \\
\code{[\var{expressions}\ldots]} & List display \\
\code{\{\var{key}:\var{datum}\ldots\}} & Dictionary display \\
\code{`\var{expression}\ldots`} & String conversion \\
\hline
\end{tabular}
\end{center}