[utils,compat] Move struct_pack and struct_unpack to compat.py

5 files changed, 33 insertions, 24 deletions

diff --git a/youtube_dl/compat.py b/youtube_dl/compat.py
index 12b53cdc8..f697bee7e 100644
--- a/youtube_dl/compat.py
+++ b/youtube_dl/compat.py
@@ -11,6 +11,7 @@ import re
 import shlex
 import shutil
 import socket
+import struct
 import subprocess
 import sys
 import itertools
@@ -592,6 +593,26 @@ if sys.version_info >= (3, 0):
 else:
     from tokenize import generate_tokens as compat_tokenize_tokenize
 
+
+try:
+    struct.pack('!I', 0)
+except TypeError:
+    # In Python 2.6 and 2.7.x < 2.7.7, struct requires a bytes argument
+    # See https://bugs.python.org/issue19099
+    def struct_pack(spec, *args):
+        if isinstance(spec, compat_str):
+            spec = spec.encode('ascii')
+        return struct.pack(spec, *args)
+
+    def struct_unpack(spec, *args):
+        if isinstance(spec, compat_str):
+            spec = spec.encode('ascii')
+        return struct.unpack(spec, *args)
+else:
+    struct_pack = struct.pack
+    struct_unpack = struct.unpack
+
+
 __all__ = [
     'compat_HTMLParser',
     'compat_HTTPError',
@@ -634,6 +655,8 @@ __all__ = [
     'compat_xml_parse_error',
     'compat_xpath',
     'shlex_quote',
+    'struct_pack',
+    'struct_unpack',
     'subprocess_check_output',
     'workaround_optparse_bug9161',
 ]
diff --git a/youtube_dl/downloader/f4m.py b/youtube_dl/downloader/f4m.py
index 664d87543..b282fe3d6 100644
--- a/youtube_dl/downloader/f4m.py
+++ b/youtube_dl/downloader/f4m.py
@@ -12,13 +12,13 @@ from ..compat import (
     compat_urlparse,
     compat_urllib_error,
     compat_urllib_parse_urlparse,
+    struct_pack,
+    struct_unpack,
 )
 from ..utils import (
     encodeFilename,
     fix_xml_ampersands,
     sanitize_open,
-    struct_pack,
-    struct_unpack,
     xpath_text,
 )
 
diff --git a/youtube_dl/extractor/rtve.py b/youtube_dl/extractor/rtve.py
index 79af47715..f59040877 100644
--- a/youtube_dl/extractor/rtve.py
+++ b/youtube_dl/extractor/rtve.py
@@ -6,6 +6,9 @@ import re
 import time
 
 from .common import InfoExtractor
+from ..compat import (
+    struct_unpack,
+)
 from ..utils import (
     ExtractorError,
     float_or_none,
@@ -13,7 +16,6 @@ from ..utils import (
     remove_start,
     sanitized_Request,
     std_headers,
-    struct_unpack,
 )
 
 
diff --git a/youtube_dl/swfinterp.py b/youtube_dl/swfinterp.py
index 06c1d6cc1..86b28716c 100644
--- a/youtube_dl/swfinterp.py
+++ b/youtube_dl/swfinterp.py
@@ -4,10 +4,12 @@ import collections
 import io
 import zlib
 
-from .compat import compat_str
+from .compat import (
+    compat_str,
+    struct_unpack,
+)
 from .utils import (
     ExtractorError,
-    struct_unpack,
 )
 
 
diff --git a/youtube_dl/utils.py b/youtube_dl/utils.py
index 6e4573784..fa16a42ad 100644
--- a/youtube_dl/utils.py
+++ b/youtube_dl/utils.py
@@ -26,7 +26,6 @@ import platform
 import re
 import socket
 import ssl
-import struct
 import subprocess
 import sys
 import tempfile
@@ -53,6 +52,7 @@ from .compat import (
     compat_urlparse,
     compat_xpath,
     shlex_quote,
+    struct_pack,
 )
 
 
@@ -1761,24 +1761,6 @@ def escape_url(url):
         fragment=escape_rfc3986(url_parsed.fragment)
     ).geturl()
 
-try:
-    struct.pack('!I', 0)
-except TypeError:
-    # In Python 2.6 and 2.7.x < 2.7.7, struct requires a bytes argument
-    # See https://bugs.python.org/issue19099
-    def struct_pack(spec, *args):
-        if isinstance(spec, compat_str):
-            spec = spec.encode('ascii')
-        return struct.pack(spec, *args)
-
-    def struct_unpack(spec, *args):
-        if isinstance(spec, compat_str):
-            spec = spec.encode('ascii')
-        return struct.unpack(spec, *args)
-else:
-    struct_pack = struct.pack
-    struct_unpack = struct.unpack
-
 
 def read_batch_urls(batch_fd):
     def fixup(url):