Package grc_gnuradio.utils.expr_utils

Classes
class	graph
Functions
def	expr_split
def	expr_prepend
def	get_variable_dependencies
def	get_graph
def	sort_variables
Variables
string	VAR_CHARS = '_'

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Detailed Description

Utility functions to comprehend variable expressions.

Author:

Josh Blum

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Function Documentation

def grc_gnuradio.utils.expr_utils.expr_prepend	(		expr,
			vars,
			prepend
	)

Search for vars in the expression and add the prepend.

Parameters:

	expr	an expression string
	vars	a list of variable names
	prepend	the prepend string

Returns:

a new expression with the prepend

Definition at line 81 of file expr_utils.py.

def grc_gnuradio.utils.expr_utils.expr_split

(

expr

)

Split up an expression by non alphanumeric characters, including underscore. Leave strings in-tact. TODO ignore escaped quotes, use raw strings.

Parameters:

expr

an expression string

Returns:

a list of string tokens that form expr

Definition at line 55 of file expr_utils.py.

def grc_gnuradio.utils.expr_utils.get_graph

(

exprs

)

Get a graph representing the variable dependencies

Parameters:

exprs

a mapping of variable name to expression

Returns:

a graph of variable deps

Definition at line 104 of file expr_utils.py.

def grc_gnuradio.utils.expr_utils.get_variable_dependencies	(		expr,
			vars
	)

Return a set of variables used in this expression.

Parameters:

	expr	an expression string
	vars	a list of variable names

Returns:

a subset of vars used in the expression

Definition at line 94 of file expr_utils.py.

def grc_gnuradio.utils.expr_utils.sort_variables

(

exprs

)

Get a list of variables in order of dependencies.

Parameters:

exprs

a mapping of variable name to expression

Returns:

a list of variable names

Exceptions:

AssertionError

circular dependencies

Definition at line 119 of file expr_utils.py.

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Variable Documentation

string grc_gnuradio::utils::expr_utils.VAR_CHARS = '_' [static]

Definition at line 24 of file expr_utils.py.

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