Duncan Booth wrote: > "[EMAIL PROTECTED]" <[EMAIL PROTECTED]> wrote: > >> In order to make sure all variables be larger than 0, I tried to created >> constraint function like this: >> >> cons = [] >> for i in range(N): >> c = lambda x: x[i] - 1e-10 >> cons.append(c) >> >> But when functions in cons are evaluated, the value in all functions are >> all the same(N-1, which is the last value of i in the loop). >> >> What I want is, when functions in cons be evaluated, every function >> refers to a different variable in X. > > So pass i in as a default value: > > for i in range(N): > def c(x, i=i): > return x[i] - 1e-10 > cons.append(c)
Thanks all of you have read or replied. Both Duncan's and Steven's solution work well. Thanks! I love python, not only because of the language itself, and also the so kind community! Xiao Jianfeng -- http://mail.python.org/mailman/listinfo/python-list
