I provide a few methods that ensure your node names conform with Ngspice canonical format and your values are all strings with Booleans converted to "1" or "0".

You can specify a numbered node with "v" (or "V") followed immediately by the number and that will be converted to V(<number>). For example,:

   v5 -> V(5)

That is especially useful for specifying numbered nodes in keywords or attribute names, since you can't use numbers or parentheses in those cases.

Since a number as a node name cannot be anything but equivalent to 'V(xxx)' where 'xxx' is the number, you might think that supplying just a number will convert to that. But, due to the way Ngspice parses the name, that doesn't work. It wouldn't be a good practice to just use the integer digits, anyhow, as that couldn't work for specifying a numbered nodes in keywords or attribute names.

Vector or node names are converted to lowercase, except for the "V" in those specified in (or converted to) "V(<name>)" format.

Method	sanitize	Ultimately, all space-delimited tokens, array values, and wrapped arguments and keywords get run through this function.
Method	toTokens	Returns a list of string tokens from the supplied arguments. Blank strings and `None` objects are ignored and `Wrapper` objects are parsed into strings.
Method	toCanonical	Ensures that the supplied vector or node name is in Ngspice-canonical format.
Method	prettify	For removing ugly superfluous junk from a netlist line and wrapping with continuation lines if necessary.

def sanitize(self, value):

Ultimately, all space-delimited tokens, array values, and wrapped arguments and keywords get run through this function.

def toTokens(self, *args):

Returns a list of string tokens from the supplied arguments. Blank strings and None objects are ignored and Wrapper objects are parsed into strings.

def toCanonical(self, name):

Ensures that the supplied vector or node name is in Ngspice-canonical format.

def prettify(self, text):

For removing ugly superfluous junk from a netlist line and wrapping with continuation lines if necessary.

API Documentation for pingspice, generated by pydoctor at 2021-09-18 08:41:11.

pingspice.util.Formatter(object) class documentation

`pingspice.util.Formatter(object)` class documentation