How can I use Flask-WTF for file uploads?

How can I use Flask-WTF for file uploads?

You can use Flask-WTF's FileField to handle file uploads in your Flask application. First, ensure you have Flask-WTF installed.

What do I need to install to get started?

You need to install Flask-WTF and Flask. You can do this using pip: pip install Flask-WTF Flask.

Can you show me a simple example?

Sure! Here's a basic example:

from flask import Flask, render_template, request
from flask_wtf import FlaskForm
from wtforms import FileField, SubmitField

app = Flask(__name__)
app.secret_key = 'your_secret_key'

class UploadForm(FlaskForm):
    file = FileField('Upload File')
    submit = SubmitField('Submit')

@app.route('/', methods=['GET', 'POST'])
def upload():
    form = UploadForm()
    if form.validate_on_submit():
        file = form.file.data
        # Process the file here
        return 'File uploaded successfully!'
    return render_template('upload.html', form=form)

if __name__ == '__main__':
    app.run(debug=True)

What file types can I upload?

You can specify allowed file types by validating the file extension in your form's validation method.