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-rw-r--r--src/lxml/html/__init__.py2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/lxml/html/__init__.py b/src/lxml/html/__init__.py
index 525f9dc2..b0ab2c1e 100644
--- a/src/lxml/html/__init__.py
+++ b/src/lxml/html/__init__.py
@@ -1137,6 +1137,8 @@ def open_http_urllib(method, url, values):
data = None
else:
data = urlencode(values)
+ if not isinstance(data, bytes):
+ data = data.encode('ASCII')
return urlopen(url, data)