fix bug for lower version

phonopy/interface/abacus.py

@@ -313,23 +313,13 @@ def read_abacus_output(filename):
                 natom = int(re.search("[0-9]+", line).group())
             if re.search(r"TOTAL-FORCE \(eV/Angstrom\)", line):
                 force = np.zeros((natom, 3))
-                _match_pattern = (
-                    r"^(\s*)([A-Za-z]*[0-9]+)((\s*[-]?[0-9]+\.[0-9]+){3})(.*)$"
-                )
-                _match = re.match(_match_pattern, line)
-                while not _match:
-                    line = file.readline()
-                    _match = re.match(_match_pattern, line)
-                iatom = 0
-                while _match:
-                    fx, fy, fz = (_match.group(3).split()[i].strip() for i in range(3))
-                    force[iatom] = (float(fx), float(fy), float(fz))
-                    iatom += 1
-                    if iatom == natom:
-                        break
-                    else:
-                        line = file.readline()
-                        _match = re.match(_match_pattern, line)
+                ver_diff = file.readline()
+                if "---" not in ver_diff:
+                    for i in range(3):
+                        file.readline()
+                for i in range(natom):
+                    _, fx, fy, fz = file.readline().split()
+                    force[i] = (float(fx), float(fy), float(fz))
 
     if force is None:
         raise ValueError("Force data not found.")