Uploaded Test files

venv/Lib/site-packages/ipywidgets/widgets/widget_upload.py

@@ -0,0 +1,68 @@
+# Copyright(c) Jupyter Development Team.
+# Distributed under the terms of the Modified BSD License.
+
+"""FileUpload class.
+
+Represents a file upload button.
+"""
+
+from traitlets import (
+    observe, default, Unicode, Dict, List, Int, Bool, Bytes, CaselessStrEnum
+)
+
+from .widget_description import DescriptionWidget
+from .valuewidget import ValueWidget
+from .widget_core import CoreWidget
+from .widget_button import ButtonStyle
+from .widget import register, widget_serialization
+from .trait_types import bytes_serialization, InstanceDict
+
+def content_from_json(value, widget):
+    """
+    deserialize file content
+    """
+    from_json = bytes_serialization['from_json']
+    output = [from_json(e, None) for e in value]
+    return output
+
+
+@register
+class FileUpload(DescriptionWidget, ValueWidget, CoreWidget):
+    """
+    Upload file(s) from browser to Python kernel as bytes
+    """
+    _model_name = Unicode('FileUploadModel').tag(sync=True)
+    _view_name = Unicode('FileUploadView').tag(sync=True)
+    _counter = Int().tag(sync=True)
+
+    accept = Unicode(help='File types to accept, empty string for all').tag(sync=True)
+    multiple = Bool(help='If True, allow for multiple files upload').tag(sync=True)
+    disabled = Bool(help='Enable or disable button').tag(sync=True)
+    icon = Unicode('upload', help="Font-awesome icon name, without the 'fa-' prefix.").tag(sync=True)
+    button_style = CaselessStrEnum(
+        values=['primary', 'success', 'info', 'warning', 'danger', ''], default_value='',
+        help="""Use a predefined styling for the button.""").tag(sync=True)
+    style = InstanceDict(ButtonStyle).tag(sync=True, **widget_serialization)
+    metadata = List(Dict(), help='List of file metadata').tag(sync=True)
+    data = List(Bytes(), help='List of file content (bytes)').tag(
+        sync=True, from_json=content_from_json
+    )
+    error = Unicode(help='Error message').tag(sync=True)
+    value = Dict(read_only=True)
+
+    @observe('_counter')
+    def on_incr_counter(self, change):
+        """
+        counter increment triggers the update of trait value
+        """
+        res = {}
+        msg = 'Error: length of metadata and data must be equal'
+        assert len(self.metadata) == len(self.data), msg
+        for metadata, content in zip(self.metadata, self.data):
+            name = metadata['name']
+            res[name] = {'metadata': metadata, 'content': content}
+        self.set_trait('value', res)
+
+    @default('description')
+    def _default_description(self):
+        return 'Upload'