How do you remove all elements from a repeated Proto field in Python?

Question

Suppose I have the .proto file:

message Bar { }

message Foo {
  repeated Bar bars = 1;
}

How can you delete all of the elements in the field bar?

Answer 1

Use a combination of del and [:]:

del foo.bars[:]

Answer 2

You can use foo.ClearField('bars') or del foo.bars[:].