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| author | Serhiy Storchaka <storchaka@gmail.com> | 2016-03-08 21:35:35 (GMT) |
|---|---|---|
| committer | Serhiy Storchaka <storchaka@gmail.com> | 2016-03-08 21:35:35 (GMT) |
| commit | 0554d83f0ff7e9da5c021b57820b26a330c09129 (patch) | |
| tree | 8eb9df1f6380e67119e38782fcdef2cb0f6aa0be /Lib/fileinput.py | |
| parent | 4a6f4825f4d4de76e73ca15d413089078970f4a2 (diff) | |
| download | cpython-0554d83f0ff7e9da5c021b57820b26a330c09129.zip cpython-0554d83f0ff7e9da5c021b57820b26a330c09129.tar.gz cpython-0554d83f0ff7e9da5c021b57820b26a330c09129.tar.bz2 | |
Issue #15068: Avoid creating a reference loop in fileinput.
Diffstat (limited to 'Lib/fileinput.py')
| -rw-r--r-- | Lib/fileinput.py | 28 |
1 files changed, 15 insertions, 13 deletions
diff --git a/Lib/fileinput.py b/Lib/fileinput.py index 9f14762..d2b5206 100644 --- a/Lib/fileinput.py +++ b/Lib/fileinput.py @@ -207,7 +207,6 @@ class FileInput: self._startlineno = 0 self._filelineno = 0 self._file = None - self._readline = self._start_readline self._isstdin = False self._backupfilename = None # restrict mode argument to reading modes @@ -245,15 +244,15 @@ class FileInput: return self def __next__(self): - line = self._readline() - if line: - self._filelineno += 1 - return line - if not self._file: - raise StopIteration - self.nextfile() - # Recursive call - return self.__next__() + while True: + line = self._readline() + if line: + self._filelineno += 1 + return line + if not self._file: + raise StopIteration + self.nextfile() + # repeat with next file def __getitem__(self, i): if i != self.lineno(): @@ -277,7 +276,10 @@ class FileInput: finally: file = self._file self._file = None - self._readline = self._start_readline + try: + del self._readline # restore FileInput._readline + except AttributeError: + pass try: if file and not self._isstdin: file.close() @@ -301,7 +303,7 @@ class FileInput: self.nextfile() # repeat with next file - def _start_readline(self): + def _readline(self): if not self._files: if 'b' in self._mode: return b'' @@ -356,7 +358,7 @@ class FileInput: self._file = self._openhook(self._filename, self._mode) else: self._file = open(self._filename, self._mode) - self._readline = self._file.readline + self._readline = self._file.readline # hide FileInput._readline return self._readline() def filename(self): |