映射操作Last Element异常

Question

#Right now
list(map(lambda x: f1.write(x + ','),feature))
# Would like it to be:
list(map(lambda x: if(x = map.end) f1.write(x) else: f1.write(x),feature))

Like the sample code above is there any thing I can do to exclude or make an exception such that the last element of the map does something else

Answer 1

Maybe you could use map only on feature[:-1] which are all the elements of feature except the last one. and then write the last element :

Edit : because feature is a map object, we convert it to a list before

feature = list(feature)
res = list(map(lambda x: f1.write(x + ','),feature[:-1]))
res.append(f1.write(feature[-1]))