How to pass file name to function?

How to pass file name to function?

If you open the file inside the save_file function, you pass the file name, which has type char * . If you open the file outside the save_file function, you pass the opened file structure pointer, which has type FILE * .

How do you pass a file into a function in Python?

Use sys. argv and exec() to execute a file with arguments read() with file as the opened script to get the script contents. Assign sys. argv to a list of the arguments to pass to the opened file. Call exec(source) with source as the string containing the script contents to execute the file.

How do you pass a file name as a parameter in Python?

This can be done by passing a comma-separated list of file names as one of the arguments while running the script. FOr example, if you have a script called `myscipt.py’ you would run it as: python myscript.py file1,file2,file3.

How do you pass a file path as an argument in Python?

To use it, you just pass a path or filename into a new Path() object using forward slashes and it handles the rest: Notice two things here: You should use forward slashes with pathlib functions. The Path() object will convert forward slashes into the correct kind of slash for the current operating system.

Can a file be a parameter?

What is a parameter file? A parameter file is a document containing all the data that the model needs to perform a simulation. It is in the XML data format and is written in plain text.

How do you write a main function in Python?

Defining Main Functions in Python

1. Put Most Code Into a Function or Class.
2. Use if __name__ == “__main__” to Control the Execution of Your Code.
3. Create a Function Called main() to Contain the Code You Want to Run.
4. Call Other Functions From main()
5. Summary of Python Main Function Best Practices.

How do you pass a path to a parameter in Python?

1. well that worked, how can i append file name to path, for example: my path variable be C:\Users\venkat\Desktop\python, i should append sam.csv as file to path. –
2. You could use os package.
3. os.path.join(path, “file_name”) , file name as string creates a file under my path directory, Thank you so much. –

Can we use raw_input in Python 3?

The raw_input() function is similar to input() function in Python 3. x. Developers are recommended to use raw_input function in Python 2. x.

What does __ file __ mean in Python?

The __file__ variable: __file__ is a variable that contains the path to the module that is currently being imported. Python creates a __file__ variable for itself when it is about to import a module. The updating and maintaining of this variable is the responsibility of the import system.

How do you distinguish between Shutil copy () and Shutil Copytree ()?

copy() will copy a single file, shutil. copytree() will copy an entire folder and every folder and file contained in it. Calling shutil. copytree( source, destination ) will copy the folder at the path source , along with all of its files and subfolders, to the folder at the path destination .

How to input filename as a variable for function?

I want to create a function where i type enter_filename (filename) and the filename is a file with .txt extension. So I need to enter something like this test.txt as my input to the function. Please help me create a function where I can enter filename test.txt and execute my program. Sign in to answer this question.

How to write a function in Python with a filename as an argument?

>>> loadfile (‘nums.txt’, 2) array ( [ 3., 6., 9.]) The def line of a function definition must end with :. The arguments to a function need to be variables, like filename, not fixed strings like ‘filename.py’. The above takes x as an argument but then ignores it and attempts to load a file name whose name is the single character x.

How to extract path and filename from a variable?

Comment : please see comments. You can only extract path and filename from (1) a parameter of the BAT itself %1, or (2) the parameter of a CALL %1 or (3) a local FOR variable %%a. in HELP CALL or HELP FOR you may find more detailed information:

Can a variable be used as an argument to a function?

The arguments to a function need to be variables, like filename, not fixed strings like ‘filename.py’. The above takes x as an argument but then ignores it and attempts to load a file name whose name is the single character x. filename.py is not a valid name for a simple variable. Even if it were, the code doesn’t attempt to use that variable name.