451 lines
15 KiB
Python
451 lines
15 KiB
Python
#
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# KiCad python module for interpreting generic netlists which can be used
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# to generate Bills of materials, etc.
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#
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# No string formatting is used on purpose as the only string formatting that
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# is current compatible with python 2.4+ to 3.0+ is the '%' method, and that
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# is due to be deprecated in 3.0+ soon
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#
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import sys
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import xml.sax as sax
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class component():
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"""Class for a set of component information"""
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def __init__(self, element):
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self.element = element
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self.libpart = None
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# Set to true when this component is included in a component group
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self.grouped = False
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def __eq__(self, other):
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"""Equlivalency operator, remember this can be easily overloaded"""
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result = False
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if self.getValue() == other.getValue():
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if self.getLib() == other.getLib():
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if self.getPart() == other.getPart():
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result = True
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return result
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def setPart(self, part):
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self.libpart = part
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def setValue(self, value):
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"""Set the value of this component"""
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v = self.element.getChild("value")
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if v:
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v.setChars(value)
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def getValue(self):
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return self.element.get("value")
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def getRef(self):
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return self.element.get("comp", "ref")
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def getFootprint(self):
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return self.element.get("footprint")
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def getDatasheet(self):
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return self.element.get("datasheet")
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def getLib(self):
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return self.element.get("libsource", "lib")
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def getPart(self):
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return self.element.get("libsource", "part")
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def getTimestamp(self):
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return self.element.get("tstamp")
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def getDescription(self):
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# When attempting to access the part, we must take care in case the part
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# cannot be found in the netlist
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try:
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d = self.libpart.getDescription()
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except AttributeError:
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d = ""
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return d
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def getDatasheet(self):
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# When attempting to access the part, we must take care in case the part
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# cannot be found in the netlist
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try:
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d = self.libpart.getDatasheet()
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except AttributeError:
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d = ""
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return d
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def getField(self, name):
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"""Return the value of a field named name. The component is first
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checked for the field, and then the components library part is checked
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for the field. If the field doesn't exist in either, an empty string is
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returned
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Keywords:
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name -- The name of the field to return the value for
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"""
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field = self.element.get("field", "name", name)
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if field == "":
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try:
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field = self.libpart.getField(name)
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except AttributeError:
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field = ""
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return field
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class netlistElement():
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"""Generic netlist element. All elements for a netlist tree which can be
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used to easily generate various output formats by propogating format
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requests to all children
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"""
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def __init__(self, name, parent=None):
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self.name = name
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self.attributes = {}
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self.parent = parent
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self.chars = ""
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self.children = []
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self.indent = ""
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def __str__(self):
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"""String representation of this netlist element
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"""
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return (self.name + "[" + self.chars + "]" + " attr:" +
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str(len(self.attributes[a])))
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def formatXML(self, amChild=False):
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"""Return this element formatted as XML
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Keywords:
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amChild -- If set to True, the start of document is not returned
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"""
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s = ""
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if not amChild:
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s = "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n"
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s += self.indent + "<" + self.name
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for a in self.attributes:
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s += " " + a + "=\"" + self.attributes[a] + "\""
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if (len(self.chars) == 0) and (len(self.children) == 0):
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s += "/>"
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else:
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s += ">" + self.chars
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for c in self.children:
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c.indent += self.indent + " "
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s += "\n"
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s += c.formatXML(True)
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if (len(self.children) > 0):
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s += "\n" + self.indent
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if (len(self.children) > 0) or (len(self.chars) > 0):
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s += "</" + self.name + ">"
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return s
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def formatHTML(self, amChild=False):
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"""Return this element formatted as HTML
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Keywords:
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amChild -- If set to True, the start of document is not returned
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"""
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s = ""
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if not amChild:
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s = """<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
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"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<title></title>
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</head>
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<body>
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<table>
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"""
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s += "<tr><td><b>" + self.name + "</b><br>" + self.chars + "</td><td><ul>"
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for a in self.attributes:
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s += "<li>" + a + " = " + self.attributes[a] + "</li>"
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s += "</ul></td></tr>\n"
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for c in self.children:
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s += c.formatHTML(True)
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if not amChild:
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s += """</table>
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</body>
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</html>"""
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return s
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def addAttribute(self, attr, value):
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"""Add an attribute to this element"""
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self.attributes[attr] = value
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def setChars(self, chars):
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"""Set the characters for this element"""
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self.chars = chars
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def addChars(self, chars):
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"""Add characters (textual value) to this element"""
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self.chars += chars
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def addChild(self, child):
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"""Add a child element to this element"""
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self.children.append(child)
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return self.children[len(self.children) - 1]
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def getParent(self):
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"""Get the parent of this element (Could be None)"""
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return self.parent
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def setAttribute(self, attr, value):
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"""Set an attributes value - in fact does the same thing as add
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attribute
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"""
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self.attributes[attr] = value
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def getChild(self, name):
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"""Returns a child element of name
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Keywords:
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name -- The name of the child element to return"""
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for child in self.children:
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if child.name == name:
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return child
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return None
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def get(self, element, attribute="", attrmatch=""):
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"""Return the data for either an attribute, or else an element"""
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if (self.name == element):
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if attribute != "":
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if attrmatch != "":
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if self.attributes[attribute] == attrmatch:
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return self.chars
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else:
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return self.attributes[attribute]
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else:
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return self.chars
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for child in self.children:
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if child.get(element, attribute, attrmatch) != "":
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return child.get(element, attribute, attrmatch)
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return ""
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class netlist():
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""" Kicad generic netlist class. Generally loaded from a kicad generic
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netlist file. Includes several helper functions to ease BOM creating
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scripts
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"""
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def __init__(self, fname=""):
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"""Initialiser for the genericNetlist class
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Keywords:
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fname -- The name of the generic netlist file to open (Optional)
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"""
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self.design = None
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self.components = []
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self.libparts = []
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self.libraries = []
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self.nets = []
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# The entire tree is loaded into self.tree
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self.tree = []
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self._curr_element = None
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if fname != "":
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self.load(fname)
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def addChars(self, content):
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"""Add characters to the current element"""
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self._curr_element.addChars(content)
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def addElement(self, name):
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"""Add a new kicad generic element to the list"""
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if self._curr_element == None:
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self.tree = netlistElement(name)
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self._curr_element = self.tree
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else:
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self._curr_element = self._curr_element.addChild(
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netlistElement(name, self._curr_element))
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# If this element is a component, add it to the components list
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if self._curr_element.name == "comp":
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self.components.append(component(self._curr_element))
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# Assign the design element
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if self._curr_element.name == "design":
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self.design = self._curr_element
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# If this element is a library part, add it to the parts list
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if self._curr_element.name == "libpart":
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self.libparts.append(part(self._curr_element))
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# If this element is a net, add it to the nets list
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if self._curr_element.name == "net":
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self.nets.append(self._curr_element)
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# If this element is a library, add it to the libraries list
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if self._curr_element.name == "library":
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self.libraries.append(self._curr_element)
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return self._curr_element
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def endDocument(self):
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"""Called when the netlist document has been fully parsed"""
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# When the document is complete, the library parts must be linked to
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# the components as they are seperate in the tree so as not to
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# duplicate library part information for every component
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for c in self.components:
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for p in self.libparts:
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if p.getPart() == c.getPart() and p.getLib() == c.getLib():
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c.setPart(p)
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def endElement(self):
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"""End the current element and switch to its parent"""
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self._curr_element = self._curr_element.getParent()
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def getDate(self):
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"""Return the date + time string generated by the tree creation tool"""
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return self.design.get("date")
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def getSource(self):
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"""Return the source string for the design"""
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return self.design.get("source")
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def getTool(self):
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"""Return the tool string which was used to create the netlist tree"""
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return self.design.get("tool")
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def groupComponents(self):
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"""Return a list of component lists. Components are grouped together
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when the value, library and part identifiers match
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"""
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groups = []
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# Make sure to start off will all components ungrouped to begin with
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for c in self.components:
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c.grouped = False
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# Group components based on the value, library and part identifiers
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for c in self.components:
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if c.grouped == False:
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c.grouped = True
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newgroup = []
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newgroup.append(c)
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# Check every other ungrouped component against this component
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# and add to the group as necessary
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for ci in self.components:
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if ci.grouped == False and ci == c:
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newgroup.append(ci)
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ci.grouped = True
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# Add the new component group to the groups list
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groups.append(newgroup)
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# Each group is a list of components, we need to sort each list first
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# to get them in order as this makes for easier to read BOM's
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for g in groups:
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g = sorted(g, key=lambda g: g.getRef())
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# Finally, sort the groups to order the references alphabetically
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groups = sorted(groups, key=lambda group: group[0].getRef())
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return groups
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def formatXML(self):
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"""Return the whole netlist formatted in XML"""
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return self.tree.formatXML()
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def formatHTML(self):
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"""Return the whole netlist formatted in HTML"""
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return self.tree.formatHTML()
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def load(self, fname):
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"""Load a kicad generic netlist
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Keywords:
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fname -- The name of the generic netlist file to open
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"""
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try:
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self._reader = sax.make_parser()
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self._reader.setContentHandler(_gNetReader(self))
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self._reader.parse(fname)
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except IOError as e:
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print >> sys.stderr, __file__, ":", e
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sys.exit(-1)
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class part():
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"""Class for a library part"""
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def __init__(self, part):
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# The part is a reference to a libpart generic netlist element
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self.element = part
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def __str__(self):
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# simply print the generic netlist element associated with this part
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return str(self.element)
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def getDatasheet(self):
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return self.element.get("docs")
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def getLib(self):
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return self.element.get("libpart", "lib")
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def getPart(self):
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return self.element.get("libpart", "part")
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def getDescription(self):
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return self.element.get("description")
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def getField(self, name):
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return self.element.get("field", "name", name)
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class _gNetReader(sax.handler.ContentHandler):
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"""SAX kicad generic netlist content handler - passes most of the work back
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to the gNetlist class which builds a complete tree in RAM for the design
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"""
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def __init__(self, aParent):
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self.parent = aParent
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def startElement(self, name, attrs):
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"""Start of a new XML element event"""
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element = self.parent.addElement(name)
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for name in attrs.getNames():
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element.addAttribute(name, attrs.getValue(name))
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def endElement(self, name):
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self.parent.endElement()
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def characters(self, content):
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# Ignore erroneous white space - ignoreableWhitespace does not get rid
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# of the need for this!
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if not content.isspace():
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self.parent.addChars(content)
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def endDocument(self):
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"""End of the XML document event"""
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self.parent.endDocument()
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