Fixed exception when entering negative phase in editor

ayazskhan · Sep 30, 2020 · 3a45ea9 · 3a45ea9
1 parent 886aff7
commit 3a45ea9
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/pyzx/editor.py b/pyzx/editor.py
@@ -118,6 +118,7 @@ def s_to_phase(s: str, t:VertexType.Type=VertexType.Z) -> Fraction:
 	if s.find('/') != -1:
 		a,b = s.split("/", 2)
 		if not a: return Fraction(1,int(b))
+		if a == '-': a = '-1'
 		return Fraction(int(a),int(b))
 	if not s: return Fraction(1)
 	return Fraction(int(s))