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-rw-r--r--src/lxml/saxparser.pxi4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/lxml/saxparser.pxi b/src/lxml/saxparser.pxi
index cdfb014b..28a482e2 100644
--- a/src/lxml/saxparser.pxi
+++ b/src/lxml/saxparser.pxi
@@ -838,8 +838,8 @@ cdef class TreeBuilder(_SaxParserTarget):
f"end tag mismatch (expected {self._last.tag}, got {tag})"
return element
- def pi(self, target, data):
- u"""pi(self, target, data)
+ def pi(self, target, data=None):
+ u"""pi(self, target, data=None)
Creates a processing instruction using the factory, appends it
(unless disabled) and returns it.