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| author | Victor Stinner <vstinner@python.org> | 2021-09-02 10:58:00 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2021-09-02 10:58:00 (GMT) |
| commit | 19ba2122ac7313ac29207360cfa864a275b9489e (patch) | |
| tree | ab34611e2b6158889cabec93f76f40c71b6ea470 /Lib/_pyio.py | |
| parent | a8066087054417885db0a2dbdce2ddb2ac498247 (diff) | |
| download | cpython-19ba2122ac7313ac29207360cfa864a275b9489e.zip cpython-19ba2122ac7313ac29207360cfa864a275b9489e.tar.gz cpython-19ba2122ac7313ac29207360cfa864a275b9489e.tar.bz2 | |
bpo-37330: open() no longer accept 'U' in file mode (GH-28118)
open(), io.open(), codecs.open() and fileinput.FileInput no longer
accept "U" ("universal newline") in the file mode. This flag was
deprecated since Python 3.3.
Diffstat (limited to 'Lib/_pyio.py')
| -rw-r--r-- | Lib/_pyio.py | 14 |
1 files changed, 1 insertions, 13 deletions
diff --git a/Lib/_pyio.py b/Lib/_pyio.py index 56e9a0c..d711974 100644 --- a/Lib/_pyio.py +++ b/Lib/_pyio.py @@ -101,7 +101,6 @@ def open(file, mode="r", buffering=-1, encoding=None, errors=None, 'b' binary mode 't' text mode (default) '+' open a disk file for updating (reading and writing) - 'U' universal newline mode (deprecated) ========= =============================================================== The default mode is 'rt' (open for reading text). For binary random @@ -117,10 +116,6 @@ def open(file, mode="r", buffering=-1, encoding=None, errors=None, returned as strings, the bytes having been first decoded using a platform-dependent encoding or using the specified encoding if given. - 'U' mode is deprecated and will raise an exception in future versions - of Python. It has no effect in Python 3. Use newline to control - universal newlines mode. - buffering is an optional integer used to set the buffering policy. Pass 0 to switch buffering off (only allowed in binary mode), 1 to select line buffering (only usable in text mode), and an integer > 1 to indicate @@ -206,7 +201,7 @@ def open(file, mode="r", buffering=-1, encoding=None, errors=None, if errors is not None and not isinstance(errors, str): raise TypeError("invalid errors: %r" % errors) modes = set(mode) - if modes - set("axrwb+tU") or len(mode) > len(modes): + if modes - set("axrwb+t") or len(mode) > len(modes): raise ValueError("invalid mode: %r" % mode) creating = "x" in modes reading = "r" in modes @@ -215,13 +210,6 @@ def open(file, mode="r", buffering=-1, encoding=None, errors=None, updating = "+" in modes text = "t" in modes binary = "b" in modes - if "U" in modes: - if creating or writing or appending or updating: - raise ValueError("mode U cannot be combined with 'x', 'w', 'a', or '+'") - import warnings - warnings.warn("'U' mode is deprecated", - DeprecationWarning, 2) - reading = True if text and binary: raise ValueError("can't have text and binary mode at once") if creating + reading + writing + appending > 1: |