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| -rw-r--r-- | Doc/library/codecs.rst | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/Doc/library/codecs.rst b/Doc/library/codecs.rst index c6dc0a3..e3f4311 100644 --- a/Doc/library/codecs.rst +++ b/Doc/library/codecs.rst @@ -206,7 +206,8 @@ utility functions: .. function:: open(filename, mode[, encoding[, errors[, buffering]]]) Open an encoded file using the given *mode* and return a wrapped version - providing transparent encoding/decoding. + providing transparent encoding/decoding. The default file mode is ``'r'`` + meaning to open the file in read mode. .. note:: @@ -214,6 +215,13 @@ utility functions: i.e. Unicode objects for most built-in codecs. Output is also codec-dependent and will usually be Unicode as well. + .. note:: + + Files are always opened in binary mode, even if no binary mode was + specified. This is done to avoid data loss due to encodings using 8-bit + values. This means that no automatic conversion of ``'\n'`` is done + on reading and writing. + *encoding* specifies the encoding which is to be used for the file. *errors* may be given to define the error handling. It defaults to ``'strict'`` |