cpython/Doc/lib/libcodeop.tex

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1999-06-23 10:33:40 -03:00
% LaTeXed from excellent doc-string.
\section{\module{codeop} ---
Compile Python code}
\declaremodule{standard}{codeop}
\sectionauthor{Moshe Zadka}{mzadka@geocities.com}
\modulesynopsis{Compile (possibly incomplete) Python code.}
The \module{codeop} module provides a function to compile Python code
with hints on whether it certainly complete, possible complete or
definitely incomplete. This is used by the \refmodule{code} module
and should not normally be used directly.
The \module{codeop} module defines the following function:
\begin{funcdesc}{compile_command}
{source\optional{, filename\optional{, symbol}}}
Try to compile \var{source}, which should be a string of Python
code. Return a code object if \var{source} is valid
Python code. In that case, the filename attribute of the code object
will be \var{filename}, which defaults to \code{'<input>'}.
Return \code{None} if \var{source} is \emph{not} valid Python
code, but is a prefix of valid Python code.
Raise an exception if there is a problem with \var{source}:
\begin{itemize}
\item \exception{SyntaxError}
if there is invalid Python syntax.
\item \exception{OverflowError}
if there is an invalid numeric constant.
\end{itemize}
The \var{symbol} argument means whether to compile it as a statement
(\code{'single'}, the default) or as an expression (\code{'eval'}).
\strong{Caveat:}
It is possible (but not likely) that the parser stops parsing
with a successful outcome before reaching the end of the source;
in this case, trailing symbols may be ignored instead of causing an
error. For example, a backslash followed by two newlines may be
followed by arbitrary garbage. This will be fixed once the API
for the parser is better.
\end{funcdesc}