remove fstring
@@ -165,7 +165,7 @@ def read_buffer(f):
elif set_name in cell_sets_element.keys():
cell_sets[name].append(cell_sets_element[set_name])
else:
- raise ReadError(f"Unknown cell set '{set_name}'")
+ raise ReadError("Unknown cell set '{}'".format(set_name))
else:
# There are just too many Abaqus keywords to explicitly skip them.
line = f.readline()
