bpo-45975: Simplify some while-loops with walrus operator (GH-29347)

2 files changed, 5 insertions, 20 deletions

diff --git a/Lib/http/client.py b/Lib/http/client.py
index 0a3e950..15c5cf6 100644
--- a/Lib/http/client.py
+++ b/Lib/http/client.py
@@ -578,11 +578,7 @@ class HTTPResponse(io.BufferedIOBase):
         assert self.chunked != _UNKNOWN
         value = []
         try:
-            while True:
-                chunk_left = self._get_chunk_left()
-                if chunk_left is None:
-                    break
-
+            while (chunk_left := self._get_chunk_left()) is not None:
                 if amt is not None and amt <= chunk_left:
                     value.append(self._safe_read(amt))
                     self.chunk_left = chunk_left - amt
@@ -998,10 +994,7 @@ class HTTPConnection:
             encode = self._is_textIO(data)
             if encode and self.debuglevel > 0:
                 print("encoding file using iso-8859-1")
-            while 1:
-                datablock = data.read(self.blocksize)
-                if not datablock:
-                    break
+            while datablock := data.read(self.blocksize):
                 if encode:
                     datablock = datablock.encode("iso-8859-1")
                 sys.audit("http.client.send", self, datablock)
@@ -1031,10 +1024,7 @@ class HTTPConnection:
         encode = self._is_textIO(readable)
         if encode and self.debuglevel > 0:
             print("encoding file using iso-8859-1")
-        while True:
-            datablock = readable.read(self.blocksize)
-            if not datablock:
-                break
+        while datablock := readable.read(self.blocksize):
             if encode:
                 datablock = datablock.encode("iso-8859-1")
             yield datablock
diff --git a/Lib/http/cookiejar.py b/Lib/http/cookiejar.py
index 65c45e2..b0161a8 100644
--- a/Lib/http/cookiejar.py
+++ b/Lib/http/cookiejar.py
@@ -1915,9 +1915,7 @@ class LWPCookieJar(FileCookieJar):
                        "comment", "commenturl")
 
         try:
-            while 1:
-                line = f.readline()
-                if line == "": break
+            while (line := f.readline()) != "":
                 if not line.startswith(header):
                     continue
                 line = line[len(header):].strip()
@@ -2017,12 +2015,9 @@ class MozillaCookieJar(FileCookieJar):
                 filename)
 
         try:
-            while 1:
-                line = f.readline()
+            while (line := f.readline()) != "":
                 rest = {}
 
-                if line == "": break
-
                 # httponly is a cookie flag as defined in rfc6265
                 # when encoded in a netscape cookie file,
                 # the line is prepended with "#HttpOnly_"