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-rw-r--r--numpy/core/memmap.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/numpy/core/memmap.py b/numpy/core/memmap.py
index 9ba4817f4..062645551 100644
--- a/numpy/core/memmap.py
+++ b/numpy/core/memmap.py
@@ -246,7 +246,7 @@ class memmap(ndarray):
bytes = long(offset + size*_dbytes)
- if mode == 'w+' or (mode == 'r+' and flen < bytes):
+ if mode in ('w+', 'r+') and flen < bytes:
fid.seek(bytes - 1, 0)
fid.write(b'\0')
fid.flush()