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