add error msg and test

Author: rushabh-v

pandas/io/parsers.py

@@ -1908,6 +1908,9 @@ def __init__(self, src, **kwds):
                 ]
             else:
                 self.names = list(range(self._reader.table_width))
+        elif self.prefix:
+            raise ValueError("Argument prefix must be None "
+                             "if argument header is not None")
 
         # gh-9755
         #

pandas/tests/io/parser/test_header.py

@@ -24,6 +24,16 @@ def test_read_with_bad_header(all_parsers):
         parser.read_csv(s, header=[10])
 
 
+def test_read_raises_on_header_prefix(all_parsers):
+    parser = all_parsers
+    msg = ("Argument prefix must be None "
+          "if argument header is not None")
+    with pytest.raises(ValueError, match=msg):
+        s = StringIO("0,1\n2,3")
+        parser.read_csv(s, header=0, prefix = "_X")
+    
+
+
 def test_negative_header(all_parsers):
     # see gh-27779
     parser = all_parsers