I'm getting a ParseResult which is a list of strings which represent numbers, for example,
['160', '240', '320', '480', '640']
which I'd like to convert to the corresponding list of integers:
[160, 240, 320, 480, 640]
However, I'm having trouble figuring out the right function to put into the setParseAction method to achieve this result. Here is what I've tried so far (in Python 2):
In [1]: from pyparsing import *
In [2]: string = "densities: '160' '240' '320' '480' '640'"
In [3]: densities = LineStart() + "densities:" + OneOrMore(QuotedString(quoteChar="'"))("densities").setParseAction(lambda tokens: map(int, tokens))
In [4]: tokens = densities.parseString(string)
In [5]: tokens.asDict()
Out[5]: {'densities': [160]}
The parse action seems to only convert the first string to an integer. How can I modify this to achieve the desired list of integers? Or perhaps more generally: what do the tokens given to the function in setParseAction represent exactly?
Update
Following, Paul McGuire's comments and answer, I've tried using .setParseAction(tokenMap(int)), but the resulting named result densities is still only [160]:
In [1]: from pyparsing import *
In [2]: string = "densities: '160' '240' '320' '480' '640'"
In [3]: densities = LineStart() + "densities:" + OneOrMore(QuotedString(quoteCha
...: r="'"))("densities").setParseAction(tokenMap(int))
In [4]: tokens = densities.parseString(string)
In [5]: tokens.asDict()
Out[5]: {'densities': [160]}
I've also tried gaining more insight into the process using traceParseAction:
In [6]: densities = LineStart() + "densities:" + OneOrMore(QuotedString(quoteChar="'"))("densities").setParseAction(traceParseAction(tokenMap(int)))
In [7]: tokens = densities.parseString(string)
>>entering int(line: 'densities: '160' '240' '320' '480' '640'', 11, (['160', '240', '320', '480', '640'], {'densities': [(['160', '240', '320', '480', '640'], {})]}))
<<leaving int (ret: [160, 240, 320, 480, 640])
The ret shown here is the desired result, but somehow it doesn't appear to be the same as tokens.asDict()['densities']?