The ornamental design for a hanger for a shoppingbag, as shown and described.
FIG. 1 is a perspective view of a hanger for a shopping bag showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a left side elevational view thereof;
FIG. 5 is a right side elevational view thereof; and,
FIG. 6 is a perspective view of the design showing two hangers in state of use with a shopping bag.
The broken lines showing a middle portion of the hanger are for illustrating purposes only and form no part of the claimed design. The broken lines showing the shopping bag are for illustrating environmental purposes only and form no part of the claimed design.