TypeError: sequence item 0: expected str instance, NoneType found

[dpriskorn]

I tried transpiling a python script today and ran into this:
Traceback (most recent call last):
File "./pyrs.py", line 20, in
rs = transpile(source)
File "/home/egil/src/rust/python2rust/pyrs/transpiler.py", line 34, in transpile
return transpiler.visit(tree)
File "/home/egil/src/rust/python2rust/pyrs/clike.py", line 74, in visit
return super(CLikeTranspiler, self).visit(node)
File "/usr/lib/python3.8/ast.py", line 363, in visit
return visitor(node)
File "/home/egil/src/rust/python2rust/pyrs/transpiler.py", line 280, in visit_Module
buf += [self.visit(b) for b in node.body]
File "/home/egil/src/rust/python2rust/pyrs/transpiler.py", line 280, in
buf += [self.visit(b) for b in node.body]
File "/home/egil/src/rust/python2rust/pyrs/clike.py", line 74, in visit
return super(CLikeTranspiler, self).visit(node)
File "/usr/lib/python3.8/ast.py", line 363, in visit
return visitor(node)
File "/home/egil/src/rust/python2rust/pyrs/transpiler.py", line 193, in visit_Expr
s = self.visit(node.value)
File "/home/egil/src/rust/python2rust/pyrs/clike.py", line 74, in visit
return super(CLikeTranspiler, self).visit(node)
File "/usr/lib/python3.8/ast.py", line 363, in visit
return visitor(node)
File "/home/egil/src/rust/python2rust/pyrs/transpiler.py", line 133, in visit_Call
args = ", ".join(args)
TypeError: sequence item 0: expected str instance, NoneType found
source: https://gitlab.com/-/snippets/2001904

[konchunas]

I found that commenting out # print(f"Calculated net cost: {cost}kr") helps.
I'll try to fix that a bit later.