updated eval(), added execfile()
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@ -87,16 +87,16 @@ exactly one argument.)
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\code{(math.floor(\var{a} / \var{b}), \var{a} \%{} \var{b})}.
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\code{(math.floor(\var{a} / \var{b}), \var{a} \%{} \var{b})}.
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\end{funcdesc}
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\end{funcdesc}
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\begin{funcdesc}{eval}{s\optional{\, globals\optional{\, locals}}}
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\begin{funcdesc}{eval}{expression\optional{\, globals\optional{\, locals}}}
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The arguments are a string and two optional dictionaries. The
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The arguments are a string and two optional dictionaries. The
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string argument is parsed and evaluated as a Python expression
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\var{expression} argument is parsed and evaluated as a Python
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(technically speaking, a condition list) using the dictionaries as
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expression (technically speaking, a condition list) using the
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global and local name space. The string must not contain null bytes
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\var{globals} and \var{locals} dictionaries as global and local name
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or newline characters. The return value is the
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space. If the \var{globals} dictionary is omitted it defaults to
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result of the expression. If the third argument is omitted it
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the \var{locals} dictionary. If both dictionaries are omitted, the
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defaults to the second. If both dictionaries are omitted, the
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expression is executed in the environment where \code{eval} is
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expression is executed in the environment where \code{eval} is
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called. Syntax errors are reported as exceptions. Example:
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called. The return value is the result of the evaluated expression.
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Syntax errors are reported as exceptions. Example:
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\bcode\begin{verbatim}
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\bcode\begin{verbatim}
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>>> x = 1
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>>> x = 1
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@ -111,10 +111,28 @@ exactly one argument.)
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passing \code{'eval'} to the \var{kind} argument.
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passing \code{'eval'} to the \var{kind} argument.
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Note: dynamic execution of statements is supported by the
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Note: dynamic execution of statements is supported by the
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\code{exec} statement.
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\code{exec} statement. Execution of statements from a file is
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supported by the \code{execfile()} function.
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\end{funcdesc}
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\end{funcdesc}
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\begin{funcdesc}{execfile}{file\optional{\, globals\optional{\, locals}}}
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This function is similar to the \code{eval()} function or the
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\code{exec} statement, but parses a file instead of a string. It is
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different from the \code{import} statement in that it does not use
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the module administration -- it reads the file unconditionally and
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does not create a new module.
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The arguments are a file name and two optional dictionaries. The
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file is parsed and evaluated as a sequence of Python statements
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(similarly to a module) using the \var{globals} and \var{locals}
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dictionaries as global and local name space. If the \var{globals}
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dictionary is omitted it defaults to the \var{locals} dictionary.
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If both dictionaries are omitted, the expression is executed in the
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environment where \code{execfile} is called. The return value is
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None.
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\end{funcdesc}
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\begin{funcdesc}{filter}{function\, list}
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\begin{funcdesc}{filter}{function\, list}
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Construct a list from those elements of \var{list} for which
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Construct a list from those elements of \var{list} for which
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\var{function} returns true. If \var{list} is a string or a tuple,
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\var{function} returns true. If \var{list} is a string or a tuple,
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@ -87,16 +87,16 @@ exactly one argument.)
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\code{(math.floor(\var{a} / \var{b}), \var{a} \%{} \var{b})}.
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\code{(math.floor(\var{a} / \var{b}), \var{a} \%{} \var{b})}.
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\end{funcdesc}
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\end{funcdesc}
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\begin{funcdesc}{eval}{s\optional{\, globals\optional{\, locals}}}
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\begin{funcdesc}{eval}{expression\optional{\, globals\optional{\, locals}}}
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The arguments are a string and two optional dictionaries. The
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The arguments are a string and two optional dictionaries. The
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string argument is parsed and evaluated as a Python expression
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\var{expression} argument is parsed and evaluated as a Python
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(technically speaking, a condition list) using the dictionaries as
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expression (technically speaking, a condition list) using the
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global and local name space. The string must not contain null bytes
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\var{globals} and \var{locals} dictionaries as global and local name
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or newline characters. The return value is the
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space. If the \var{globals} dictionary is omitted it defaults to
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result of the expression. If the third argument is omitted it
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the \var{locals} dictionary. If both dictionaries are omitted, the
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defaults to the second. If both dictionaries are omitted, the
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expression is executed in the environment where \code{eval} is
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expression is executed in the environment where \code{eval} is
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called. Syntax errors are reported as exceptions. Example:
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called. The return value is the result of the evaluated expression.
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Syntax errors are reported as exceptions. Example:
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\bcode\begin{verbatim}
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\bcode\begin{verbatim}
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>>> x = 1
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>>> x = 1
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@ -111,10 +111,28 @@ exactly one argument.)
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passing \code{'eval'} to the \var{kind} argument.
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passing \code{'eval'} to the \var{kind} argument.
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Note: dynamic execution of statements is supported by the
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Note: dynamic execution of statements is supported by the
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\code{exec} statement.
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\code{exec} statement. Execution of statements from a file is
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supported by the \code{execfile()} function.
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\end{funcdesc}
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\end{funcdesc}
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\begin{funcdesc}{execfile}{file\optional{\, globals\optional{\, locals}}}
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This function is similar to the \code{eval()} function or the
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\code{exec} statement, but parses a file instead of a string. It is
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different from the \code{import} statement in that it does not use
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the module administration -- it reads the file unconditionally and
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does not create a new module.
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The arguments are a file name and two optional dictionaries. The
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file is parsed and evaluated as a sequence of Python statements
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(similarly to a module) using the \var{globals} and \var{locals}
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dictionaries as global and local name space. If the \var{globals}
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dictionary is omitted it defaults to the \var{locals} dictionary.
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If both dictionaries are omitted, the expression is executed in the
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environment where \code{execfile} is called. The return value is
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None.
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\end{funcdesc}
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\begin{funcdesc}{filter}{function\, list}
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\begin{funcdesc}{filter}{function\, list}
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Construct a list from those elements of \var{list} for which
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Construct a list from those elements of \var{list} for which
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\var{function} returns true. If \var{list} is a string or a tuple,
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\var{function} returns true. If \var{list} is a string or a tuple,
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