I have been using pyparsing 3.0.0a2 to generate railroads (the versions 3.0.0b generates only horizontal diagrams as it seems the vertical parameter doesn't have any effect, which is annoying).
The following code is using two expressions sim and sim_expr and I am trying to create the corresponding railroads as HTML files. Note that I also would like to create the standalone SVG files for documentation but I am not sure how to do it. So if you have at least this information, please let me know in a comment.
The results are two HTML files, sim.html contains a picture but the sim_expr.html is empty.
How can I solve the problem of an empty file?
from pyparsing import *
LPAR, RPAR, COMMA, DOT, EQ, COLON = map(Suppress, "(),.=:")
sim_a = (Literal('1') ^ Literal('2'))('elm*')
+ COMMA
+ (Literal('a')
^ Literal('b')
^ Literal('c')
^ Literal('d'))
sim_b = (Literal('4') ^ Literal('5'))('elm*')
+ COMMA
+ (Literal('a')
^ Literal('b')
^ Literal('c')
^ Literal('d'))
sim = sim_a ^ sim_b
sim_expr = Group(Literal('sim')('directive')
+ LPAR
+ sim.setName('List')
+ RPAR).setName('SIM')
if __name__ == '__main__':
if '3.0.0b' in __version__:
sim.create_diagram('sim.html')
sim_expr.create_diagram('sim_expr.html')
elif '3.0.0' in __version__:
from pyparsing.diagram import to_railroad, railroad_to_html
with open('sim.html', 'w') as fp:
rr = to_railroad(sim)
fp.write(railroad_to_html(rr))
with open('sim_expr.html', 'w') as fp:
rr = to_railroad(sim_expr)
fp.write(railroad_to_html(rr))
sim_expr.html
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