BF: must decode() buffer

Author: Ben Cipollini

nipype/interfaces/base.py

@@ -1171,7 +1171,7 @@ def read(self, drain=0):
     def _read(self, drain):
         "Read from the file descriptor"
         fd = self.fileno()
-        buf = os.read(fd, 4096)
+        buf = os.read(fd, 4096).decode()
         if not buf and not self._buf:
             return None
         if '\n' not in buf: