Solution
import os
import tempfile
import firebase
...
file = request.files['file']
temp = tempfile.NamedTemporaryFile(delete=False)
file.save(temp.name)
firebase.storage().put(temp.name)
# Remove temp file
os.remove(temp.name)
import os
import tempfile
import firebase
...
file = request.files['file']
temp = tempfile.NamedTemporaryFile(delete=False)
file.save(temp.name)
firebase.storage().put(temp.name)
# Remove temp file
os.remove(temp.name)