upload.py

from flask import Flask, request

app = Flask(__name__)


@app.route("/", methods=['GET', 'POST'])
def upload():
    if request.method == 'GET':
        return """
        <form enctype="multipart/form-data" method="POST">
            <input type="file" name="file" />
            <input type="submit" value="Submit" />
        </form>
        """
    fil = request.files['file']
    print(fil.filename)
    fil.save('./'+fil.filename)
    return "OK"

if __name__ == '__main__':
    app.run(host='0.0.0.0', debug=True)