Package genshi :: Package template :: Module interpolation |

# Module interpolation

String interpolation routines, i.e. the splitting up a given text into some parts that are literal strings, and others that are Python expressions.

Functions
interpolate(text, filepath=None, lineno=-1, offset=0, lookup=`'``strict``'`) Parse the given string and extract expressions. |

Function Details

### interpolate(text, filepath=None, lineno=-1, offset=0, lookup=`'``strict``'`) |
Parse the given string and extract expressions. This function is a generator that yields TEXT events for literal strings, and EXPR events for expressions, depending on the results of parsing the string.
    >>> for kind, data, pos in interpolate("hey ${foo}bar"):
    ...     print('%s %r' % (kind, data))
    TEXT 'hey '
    EXPR Expression('foo')
    TEXT 'bar'
Parameters: `text` - the text to parse `filepath` - absolute path to the file in which the text was found (optional) `lineno` - the line number at which the text was found (optional) `offset` - the column number at which the text starts in the source (optional) `lookup` - the variable lookup mechanism; either "lenient" (the default), "strict", or a custom lookup class Returns: a list of TEXT and EXPR events Raises: `TemplateSyntaxError` - when a syntax error in an expression is encountered