From: Inada Naoki <songofacandy@gmail.com>
Date: Tue, 13 Apr 2021 04:51:49 +0000 (+0900)
Subject: bpo-43787: Add __iter__ to GzipFile, BZ2File, and LZMAFile (GH-25353)
X-Git-Tag: v3.10.0b1~308
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=d2a8e69c2c605fbaa3656a5f99aa8d295f74c80e;p=thirdparty%2FPython%2Fcpython.git

bpo-43787: Add __iter__ to GzipFile, BZ2File, and LZMAFile (GH-25353)
---

diff --git a/Lib/bz2.py b/Lib/bz2.py
index 43f321ae8523..a2c588e7487f 100644
--- a/Lib/bz2.py
+++ b/Lib/bz2.py
@@ -197,6 +197,10 @@ class BZ2File(_compression.BaseStream):
         self._check_can_read()
         return self._buffer.readline(size)
 
+    def __iter__(self):
+        self._check_can_read()
+        return self._buffer.__iter__()
+
     def readlines(self, size=-1):
         """Read a list of lines of uncompressed bytes from the file.
 
diff --git a/Lib/gzip.py b/Lib/gzip.py
index 0a8993ba3547..9a4e0f9c00c5 100644
--- a/Lib/gzip.py
+++ b/Lib/gzip.py
@@ -398,6 +398,10 @@ class GzipFile(_compression.BaseStream):
         self._check_not_closed()
         return self._buffer.readline(size)
 
+    def __iter__(self):
+        self._check_not_closed()
+        return self._buffer.__iter__()
+
 
 class _GzipReader(_compression.DecompressReader):
     def __init__(self, fp):
diff --git a/Lib/lzma.py b/Lib/lzma.py
index c8b197055cdd..2ada7d81d3c8 100644
--- a/Lib/lzma.py
+++ b/Lib/lzma.py
@@ -221,6 +221,10 @@ class LZMAFile(_compression.BaseStream):
         self._check_can_read()
         return self._buffer.readline(size)
 
+    def __iter__(self):
+        self._check_can_read()
+        return self._buffer.__iter__()
+
     def write(self, data):
         """Write a bytes object to the file.
 
diff --git a/Misc/NEWS.d/next/Library/2021-04-12-15-15-50.bpo-43787.wCy_Wd.rst b/Misc/NEWS.d/next/Library/2021-04-12-15-15-50.bpo-43787.wCy_Wd.rst
new file mode 100644
index 000000000000..9b8d945cbb8a
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2021-04-12-15-15-50.bpo-43787.wCy_Wd.rst
@@ -0,0 +1,3 @@
+Add ``__iter__()`` method to :class:`bz2.BZ2File`, :class:`gzip.GzipFile`, and
+:class:`lzma.LZMAFile`. It makes iterating them about 2x faster. Patch by
+Inada Naoki.