fix: catch YappsSyntaxError as StructureFormatErrro

Author: ycexiao

news/catch-YapsSyntaxError.rst

@@ -0,0 +1,23 @@
+**Added:**
+
+* <news item>
+
+**Changed:**
+
+* <news item>
+
+**Deprecated:**
+
+* <news item>
+
+**Removed:**
+
+* <news item>
+
+**Fixed:**
+
+* Let ``diffpy.structure`` pass the tests with ``pycifrw`` installed from ``PyPI``.
+
+**Security:**
+
+* <news item>

src/diffpy/structure/parsers/p_cif.py

@@ -36,6 +36,7 @@
 from diffpy.structure import Atom, Lattice, Structure
 from diffpy.structure.parsers import StructureParser
 from diffpy.structure.structureerrors import StructureFormatError
+from CifFile.yapps3_compiled_rt import YappsSyntaxError
 
 # ----------------------------------------------------------------------------
 
@@ -408,7 +409,7 @@ def _parseCifDataSource(self, datasource):
                     # stop after reading the first structure
                     if self.stru is not None:
                         break
-        except (StarError, ValueError, IndexError) as err:
+        except (YappsSyntaxError, StarError, ValueError, IndexError) as err:
             exc_type, exc_value, exc_traceback = sys.exc_info()
             emsg = str(err).strip()
             e = StructureFormatError(emsg)