Fix read_bytes() in Python 2 on 'file' objects

generalmimon · generalmimon · commit c56bf6b81c10 · 2022-04-09T03:44:03.000+02:00
diff --git a/kaitaistruct.py b/kaitaistruct.py
@@ -300,7 +300,9 @@ def read_bytes(self, n):
             )
 
         is_satisfiable = True
-        if self._io.seekable():
+        # in Python 2, there is a common error ['file' object has no
+        # attribute 'seekable'], so we need to make sure that seekable() exists
+        if callable(getattr(self._io, 'seekable', None)) and self._io.seekable():
             num_bytes_available = self.size() - self.pos()
             is_satisfiable = (n <= num_bytes_available)
 

Original file line number	Diff line number	Diff line change
`@@ -300,7 +300,9 @@ def read_bytes(self, n):`
`300`	`300`	`)`
`301`	`301`
`302`	`302`	`is_satisfiable = True`
`303`		`- if self._io.seekable():`
	`303`	`+ # in Python 2, there is a common error ['file' object has no`
	`304`	`+ # attribute 'seekable'], so we need to make sure that seekable() exists`
	`305`	`+ if callable(getattr(self._io, 'seekable', None)) and self._io.seekable():`
`304`	`306`	`num_bytes_available = self.size() - self.pos()`
`305`	`307`	`is_satisfiable = (n <= num_bytes_available)`
`306`	`308`