Flask parse multiple file upload
Assume you have a form with: <input type="file" .... multiple> This strategy can be often use in Angular >2. Angular Material does not support input type file, so to enable file upload we catch click mouse event on usual material input control and trigger click on hidden input type file. If you would like to upload multiple files with this strategy into Flask server, it will be hold in ImmutableMultiDict ( more ). This dictionary can store multiple values for the same key. For example: ImmutableMultiDict([('files', <FileStorage: '[Edward_Thorp]_Beat_the_marke.pdf' ('application/pdf')>), ('files', <FileStorage: '[Edward_Thorp]_The_mathematics_of_gambling.djvu' ('image/vnd.djvu')>), ('files', <FileStorage: ['Larry_Dressler]_Roger_Schwarz_Standing_in_the_F.pdf' ('application/pdf')>)]) If you would try ...