Saving uploaded files in Flask - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to save an uploaded file in Flask.

Flask

file = request.files['file']
file.[1]('uploads/' + file.filename)

Drag options to blanks, or click blank then click option'

Aupload

Bopen

Cwrite

Dsave

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'write' instead of 'save' causes an error because 'write' is not a method of the file object.

Using 'open' is incorrect because it is a built-in function, not a method of the uploaded file.

The save method stores the uploaded file to the given path.

2fill in blank

medium

Complete the code to check if the uploaded file has a filename before saving.

Flask

if file.[1] != '':
    file.save('uploads/' + file.filename)

Drag options to blanks, or click blank then click option'

Apath

Bfilename

Cfile

Dname

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'name' instead of 'filename' will cause an AttributeError.

Checking 'file' or 'path' attributes does not give the filename.

The filename attribute holds the name of the uploaded file.

3fill in blank

hard

Fix the error in the code to securely save the uploaded file using Werkzeug's secure_filename.

Flask

from werkzeug.utils import [1]
filename = secure_filename(file.filename)
file.save('uploads/' + filename)

Drag options to blanks, or click blank then click option'

Asecure_filename

Bfilename_secure

Csafe_filename

Dsecure_file

Attempts:

3 left

💡 Hint

Common Mistakes

Importing a non-existent function like 'secure_file' causes ImportError.

Using wrong function names leads to NameError.

The correct import is secure_filename from werkzeug.utils.

4fill in blank

hard

Fill both blanks to save the uploaded file securely in a folder named 'uploads'.

Flask

from werkzeug.utils import [1]
filename = [2](file.filename)
file.save('uploads/' + filename)

Drag options to blanks, or click blank then click option'

Asecure_filename

Bsafe_name

Csanitize_filename

Dclean_filename

Attempts:

3 left

💡 Hint

Common Mistakes

Using different names for import and usage causes NameError.

Using made-up function names causes ImportError.

Both blanks require secure_filename to import and use the function correctly.

5fill in blank

hard

Fill all three blanks to check if a file was uploaded, secure its filename, and save it.

Flask

if '[1]' in request.files:
    file = request.files['file']
    if file.[2] != '':
        from werkzeug.utils import [3]
        filename = secure_filename(file.filename)
        file.save('uploads/' + filename)

Drag options to blanks, or click blank then click option'

Afile

Bfilename

Csecure_filename

Dupload

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong keys in request.files causes KeyError.

Not checking if filename is empty can cause saving errors.

Importing wrong function names causes ImportError.

The code checks if 'file' is in the uploaded files, then checks filename attribute, imports secure_filename, and saves the file securely.