python - Difference between modes a, a+, w, w+, and r+ in built-in …
Oct 3, 2025 · In Python's built-in open function, what is the difference between the modes w, a, w+, a+, and r+? The documentation implies that these all allow writing to the file, and says that they open the …
python - Open files in 'rt' and 'wt' modes - Stack Overflow
Apr 14, 2014 · In Python 3 there's an additional difference between text and binary file modes (on all platforms). In text mode, read returns Unicode strings. In binary mode, read returns a bytes instance. …
Python file open function modes - Stack Overflow
Jul 19, 2015 · I have noticed that, in addition to the documented mode characters, Python 2.7.5.1 in Windows XP and 8.1 also accepts modes U and D at least when reading files. Mode U is used in …
python - What does python3 open "x" mode do? - Stack Overflow
Mar 27, 2015 · 'x': open for exclusive creation, failing if the file already exists When you specify exclusive creation, it clearly means, you would use this mode for exclusively creating the file. The need for this …
Confused by python file mode "w+" - Stack Overflow
Apr 25, 2013 · From the doc, Modes 'r+', 'w+' and 'a+' open the file for updating (note that 'w+' truncates the file). Append 'b' to the mode to open the file in binary mode, on systems that differentiate …
python - How to open a file for both reading and writing ... - Stack ...
Jul 11, 2011 · Is there a way to open a file for both reading and writing? As a workaround, I open the file for writing, close it, then open it again for reading. But is there a way to open a file for both readi...
python - What is the difference between rb and r+b modes in file ...
Apr 1, 2013 · On Windows, 'b' appended to the mode opens the file in binary mode, so there are also modes like 'rb', 'wb', and 'r+b'. Python on Windows makes a distinction between text and binary files; …
file - What does 'wb' mean in this code, using Python? - Stack Overflow
Apr 19, 2010 · Additionally, Python will convert line endings (\n) to whatever the platform-specific line ending is, which would corrupt a binary file like an exe or png file. Text mode should therefore be …
python - Is it important to specify file mode ('w', 'r', 'a') when ...
Jul 28, 2022 · As per the documentation, the mode argument is an optional string that specifies the mode in which the file is opened. It defaults to 'r' which means open for reading in text mode.
Python file modes detail - Stack Overflow
Mar 17, 2009 · 13 This question already has answers here: Difference between modes a, a+, w, w+, and r+ in built-in open function (9 answers) Python file open function modes (2 answers)