How to get console output into a txt file (using python flask server)

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Let's suppose I have a server code and when the function savePersonList() is called, the result printed on console should be saved into a text file.

#server coding

app = Flask(__name__)
def allowed_file(filename):
  # this has changed from the original example because the original did not work for me
    return filename[-3:].lower() in ALLOWED_EXTENSIONS


@app.route('/', methods=['GET', 'POST']) #integrate code below function
def upload_file(): 

    if request.authorization and request.authorization.username == 'user1' and request.authorization.password == 'pass2': #login code line
        if request.method == 'POST':
            print("This is a post Request \n\n")
            file = request.files['file']
            if file and allowed_file(file.filename):
                print("File Sent is valid \n\n")
                print('**found file', file.filename)
                filename = secure_filename(file.filename) #use this from existing code before calling video capture 
                file.save(os.path.join(app.config['UPLOAD_FOLDER'], filename))  
    #code
                ''' This is the start of face recongition script '''
                CF.Key.set('d7c5495c64a44bc692761cd7c45ad56e')
                CF.BaseUrl.set('https://southeastasia.api.cognitive.microsoft.com/face/v1.0/')

                firstRun = True
                lastRun  = False

                #savePersonList()

if you are running on linux just use python app.py > file.txt(provided file.txt is created) might as well work on windows.

and add logger to your flask app as described in docs

so you can write it for each request yourself the file.txt then acts as your debug log.Hope it helps.

How do I redirect a console output to a file in python? To redirect the output of a command to a text file instead of printing it to the screen in the command window, we simply need to execute the command and append it with the “>” angle bracket symbol—called, appropriately enough, a redirection.

You could redirect sys.stdout to be a file (see Redirect stdout to a file in Python?) but it might be better to use the logging module.

How do you write the output of a function to a text file in Python? Hi to all! I’m wondering if there is any possibility to save the output as a textfile. With output, I mean this: It would be great, it I could save the file to a defined path; and it would be even better, when the file automatically opens after the script has come to an end … Perhaps, anybody knows how to do this?🙂 Thanks a lot! Phil

The answer of srinath samala is correct is the general case, but as you mentionned on the comment, not all the output is redirected to the file.


This is because some output of your Flask app is redirected to STDERR, and not only STDOUT.

To redirect both into your txt file, you want to use this :

python app.py >> file.txt 2>&1

So if you have a bunch of text in there already it will add it to the end. For the clarity, the output will no longer appear in stdout, it will be diverted from stdout to the file. Would anyone be interested in watching me create a Django app from on the side aswell since Corey uses it a lot in his flask tutorials. is that good idea? To do this, you’ll need to add 2> to the end of the command, followed by the output error file you want to create. In this example, you’ll type the command: dir test.exe > myoutput.txt 2> output.err. This sends the standard output stream to myoutput.txt, and the standard error stream to output.err.

Save it to a file server.py and then run python server.py . If you do another curl request in a second console you won't get any So instead of flushing on every line of output it accumulates a lot more text before anything is  Syntax to save and append the output of a command to a file. The > operator always overwrite existing output files. To append the output of a command to the same file use >> operator as follows: command >> filename In this example run two commands called date and who and save output to the same file called demo.txt:

Get introduced to the Python Flask web application framework. a Flask app in development; Enabling debug mode; Using print() to print messages to the console In your text-editor, create a new file named app.py – and keep track of where you save it, First, we have to write the code for our app. This happens because Python is trying to be clever. If the output of the command is not a console it goes into a buffered output mode. So instead of flushing on every line of output it accumulates a lot more text before anything is actually written. To get around this the python process can be launched with a -u parameter. This turns off the

Utilizing the built-in logging module to generate daily log files for debugging your own timed logging system that outputs a daily log file for your Flask or Django server. Open up a terminal and point it to the directory and run it via the following command: python A useful Git command for searching text. Questions: I want to redirect the print to a .txt file using python. I have a ‘for’ loop, which will ‘print’ the output for each of my .bam file while I want to redirect ALL these output to one file.

Comments
  • with this I'm getting only this output:afshan@afshan-VirtualBox:~/Microsoft_Azure/phase_2/flalsk_azure$ python3 video_json.py > output.txt * Running on 192.168.0.112:5000 (Press CTRL+C to quit) * Restarting with stat * Debugger is active! * Debugger PIN: 255-995-400