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 …

Jul 10, 2015 · 1 Comment "When you use with statement with open function, you do not need to close the file at the end, because with would automatically close it for you." I never knew about …

Jun 3, 2010 · What is the best way to open a file as read/write if it exists, or if it does not, then create it and open it as read/write? From what I read, file = open ('myfile.dat', 'rw') should do …

I'm looking at how to do file input and output in Python. I've written the following code to read a list of names (one per line) from a file into another file while checking a name against the name...

Oct 22, 2013 · I am very new to programming and the python language. I know how to open a file in python, but the question is how can I open the file as a parameter of a function?

Since Python 3.3, you can use the class ExitStack from the contextlib module to safely open an arbitrary number of files. It can manage a dynamic number of context-aware objects, which …

The default UTF-8 encoding of Python 3 only extends to conversions between bytes and str types. open() instead chooses an appropriate default encoding based on the environment: encoding …

Sep 3, 2015 · is not quite correct. The 'r' indicates that you wish to open the file in read mode; it does not read anything in itself. You can also read a file that is opened in other modes, …

May 18, 2020 · 23 I was learning Python in Codecademy and they were talking about using the open() function for CSV files. I couldn't really understand what the argument newline='' meant …

Aug 29, 2020 · By patching the open function inside the __builtin__ module to my mock_open(), I can mock writing to a file without creating one. Note: If you are using a module that uses …