Which mode is not a valid way to access a file from within a python script

I want to read a text file using python. I've done it already in my old laptop and desktop computer, but when I try it on new system, error appears: file directory is not valid and file doesn't exist. txtFile = open("D:/folder/m.txt") I can't even install external libraries which contains the code above! I am using windows 8 and latest python 2.7 edit: guys, my main problem is the open() method always returns "file directory is not valid","There is no such a file in that directory" even when it's completely valid and exist! I tied it with various files and directories and it doesn't work at all. it works on my old systems but not working on this new laptop. I can't even use external libraries because the open() method is not working in anywhere even in libraries. please help me. If you type on Windows, you should always use \ instead of / when input the path of a file. Also, always notice the Escape Character. Use \\ if you are not sure. Err...we can also add an r before the path. So, try this below. txtFile = open("D:\\folder\\m.txt") txtFile = open(r"D:\folder\m.txt") Both of them should work. with open('file.txt', 'r+') as f: builtins.py says: Character Meaning --------- --------------------------------------------------------------- 'r' open for reading (default) 'w' open for writing, truncating the file first 'x' create a new file and open it for writing 'a' open for writing, appending to the end of the file if it exists 'b' binary mode 't' text mode (default) '+' ope...

I've encountered a very odd error. I have this code as part of many of my functions in my python script: url=['http://API_URL/query/query.aspx?name=', name, '&md=user'] url=''.join(url) file = open("QueryESO.xml", "w") filehandle = urllib.urlopen(url) for lines in filehandle.readlines(): file.write(lines) file.close() When I run in IDLE, everything works great. If I run it with Python (Command Line) then it gives me this error: [Errno 22] invalid mode('w') or filename: 'QueryESO.xml' Here's where it starts to get weird: Weird #1: I have the exact same code in different functions in my script, but the error only occurs for one of them. Weird #2: If I change the code to this, it works fine: url=['http://API_URL/query/query.aspx?name=', name, '&md=user'] print url url=''.join(url) file = open("QueryESO.xml", "w") filehandle = urllib.urlopen(url) for lines in filehandle.readlines(): file.write(lines) file.close() I also tried moving the print url to after I joined the list, which didn't work, and I just tried print "", which also got the previously mentioned error. So I guess I've found a solution... but can anyone explain this behavior? Am I doing something wrong? (And do you need me to post the entire script so you can mess with it?) EDIT: Here is the entire code: import urllib from Tkinter import * import tkFont master = Tk() QUERY_ESO = "QueryESO.xml" def QueryXML(xml, attribute): x = [""] x=''.join(x) z = xml.split(x, 1) x = [""] x=''.join(x) z=z[1] z=z.split(x, 1) return...

Python file modes Don’t confuse, read about every mode below. • rfor reading – The file pointer is placed at the beginning of the file. This is the default mode. • r+Opens a file for both reading and writing. The file pointer will be at the beginning of the file. • w Opens a file for writing only. Overwrites the file if the file exists. If the file does not exist, create a new file for writing. • w+Opens a file for both writing and reading. Overwrites the existing file if the file exists. If the file does not exist, it creates a new file for reading and writing. • rbOpens a file for reading only in binary format. The file pointer is placed at the beginning of the file. • rb+Opens a file for both reading and writing in binary format. • wb+Opens a file for both writing and reading in binary format. Overwrites the existing file if the file exists. If the file does not exist, it creates a new file for reading and writing. • aOpens a file for appending. The file pointer is at the end of the file if the file exists. That is, the file is in the append mode. If the file does not exist, it creates a new file for writing. • abOpens a file for appending in binary format. The file pointer is at the end of the file if the file exists. That is, the file is in the append mode. If the file does not exist, it creates a new file for writing. • a+Opens a file for both appending and reading. The file pointer is at the end of the file if the file exists. The file opens in the append mode. If t...

You no longer need to be worried if you are taking the LinkedIn Python (Programming Language) Skill Quiz Exam and are unsure about the proper answer to the question “Which mode is not a valid way to access a file from within a Python script?” I have provided the right answer to your question below. Which mode is not a valid way to access a file from within a Python script? Options • append(‘a’) • read(‘r’) • scan(‘s’) • write(‘w’) The Correct Answer Is: • scan(‘s’) Conclusion I believe I was successful in answering your query “Which mode is not a valid way to access a file from within a Python script?”. I hope you easily pass the certification exam and get the certificate as soon as possible. Have a great time! Good luck!

Closed 7 months ago. From the 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 between binary and text files; on systems that don’t have this distinction, adding the 'b' has no effect. and w+ : Opens a file for both writing and reading. Overwrites the existing file if the file exists. If the file does not exist, creates a new file for reading and writing. But, how to read a file open with w+? Here is a list of the different modes of opening a file: • r Opens a file for reading only. The file pointer is placed at the beginning of the file. This is the default mode. • rb Opens a file for reading only in binary format. The file pointer is placed at the beginning of the file. This is the default mode. • r+ Opens a file for both reading and writing. The file pointer will be at the beginning of the file. • rb+ Opens a file for both reading and writing in binary format. The file pointer will be at the beginning of the file. • w Opens a file for writing only. Overwrites the file if the file exists. If the file does not exist, creates a new file for writing. • wb Opens a file for writing only in binary format. Overwrites the file if the file exists. If the file does not exist, creates a new file for writing. • w+ Opens a file for both writing and reading. Overwrites the existing file if the file exists. If the file does not exist, creates a new file for rea...

python3.11 to the shell. /usr/local/python is a popular alternative location.) On Windows machines where you have installed Python from the Microsoft Store, the python3.11 command will be available. If you have the py.exe launcher installed, you can use the py command. See Excursus: Setting environment variables for other ways to launch Python. Typing an end-of-file character ( Control- D on Unix, Control- Z on Windows) at the primary prompt causes the interpreter to exit with a zero exit status. If that doesn’t work, you can exit the interpreter by typing the following command: quit(). The interpreter’s line-editing features include interactive editing, history substitution and code completion on systems that support the Control- P to the first Python prompt you get. If it beeps, you have command line editing; see Appendix Interactive Input Editing and History Substitution for an introduction to the keys. If nothing appears to happen, or if ^P is echoed, command line editing isn’t available; you’ll only be able to use backspace to remove characters from the current line. The interpreter operates somewhat like the Unix shell: when called with standard input connected to a tty device, it reads and executes commands interactively; when called with a file name argument or with a file as standard input, it reads and executes a script from that file. A second way of starting the interpreter is python -c command [arg] ..., which executes the statement(s) in command, analogous to...