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-rw-r--r--numpy/lib/npyio.py3
1 files changed, 2 insertions, 1 deletions
diff --git a/numpy/lib/npyio.py b/numpy/lib/npyio.py
index b1e891f77..b63003f80 100644
--- a/numpy/lib/npyio.py
+++ b/numpy/lib/npyio.py
@@ -1291,7 +1291,8 @@ def genfromtxt(fname, dtype=float, comments='#', delimiter=None,
"""
# Py3 data conversions to bytes, for convenience
- comments = asbytes(comments)
+ if comments is not None:
+ comments = asbytes(comments)
if isinstance(delimiter, unicode):
delimiter = asbytes(delimiter)
if isinstance(missing, unicode):