您可以将关键字参数传递
assign为字典，如下所示：
kwargs = {"ln(A)" : lambda x: np.log(x.A)}df.assign(**kwargs) A B ln(A)0 1 0.500033 0.0000001 2 -0.392229 0.6931472 3 0.385512 1.0986123 4 -0.029816 1.3862944 5 -2.386748 1.6094385 6 -1.828487 1.7917596 7 0.096117 1.9459107 8 -2.867469 2.0794428 9 -0.731787 2.1972259 10 -0.686110 2.302585
