如何在 Python 中的多行中添加多个字符串？

Question

I'm lost in Python world:

message = struct.pack('B', 4) +
    minissdpdStringEncode(st) +
    minissdpdStringEncode(usn) +
    minissdpdStringEncode(server) +
    minissdpdStringEncode(location)

It doesn't run. Do I really need to put this all on one line or something?

That would be messy in my opinion.

Answer 1

You have two choices:

message = struct.pack('B', 4) + \
    minissdpdStringEncode(st)

or

message = (struct.pack('B', 4) +
    minissdpdStringEncode(st))

I usually find the second form with parentheses easier to read.

Answer 2

You can continue a line by ending it with a backslash \\ :

message = struct.pack('B', 4) + \
    minissdpdStringEncode(st) + \
    minissdpdStringEncode(usn) + \
    minissdpdStringEncode(server) + \
    minissdpdStringEncode(location)

Answer 3

除了最后一行之外，在语句的每一行末尾添加一个反斜杠 (\\)。