Python打印string.split不带方括号

Question

I have

cmd=arg[3:]

which gives for eg

['file python parameter1=5 parameter2=456 ']

When I am printing I want to print in the format - python file parameters..

I tried

print "%s %s %s" % (string.split(cmd[0])[1],string.split(cmd[0])[0],string.split(cmd[0])[2:])

which gives

python file ['parameter1=5 parameter2=456 ']

How can i get the parameters part printed without the square braces or the quotes?

Thanks. For the last part how can I print

Answer 1

You are asking Python to turn a list into a string. This is why you are seeing the brackets and quotes. All you need to do is use join to make it a string again.

" ".join(string.split(cmd[0])[2:])

or if you really prefer the string module

string.join(" ", string.split(cmd[0])[2:])

I would prefer to see the code written like this if I were doing a code review:

fname, interp, args = cmd[0].split(" ", 2)
print "%s %s %s" % (interp, fname, args)

Answer 2

You could try something like that:

' '.join(cmd[0].split()[2:])

instead of:

string.split(cmd[0])[2:]

Also, I would recommend you to use an intermediate variable to avoid to do the same split 3 times... Or even better :

print ' '.join(cmd[0].split(' ', 2))

or actually simply:

print cmd[0]

But I guess you don't want to only print it...

Answer 3

与% -style字符串格式相比，优先使用format方法。

print "{0[1]} {0[0]} {0[2]}".format(cmd[0].split(None, 2))