Python：打印跨越给定宽度的字符串，但第一部分左对齐，第二部分右对齐

Question

I would like to output something like:

===>>> [FINISHED] Building sources: bla                               (1h:20m:30s)
===>>> [FINISHED] Building sources: The brown fox jumped...           (7h:05m:00s)

That is, a string filling a width of N characters, with a first part left-aligned, and a second part right-aligned.

I have a print in a function and I just want to get an easy-to-read output. At the end of the execution of the script, I will see a few lines like the ones above.

Some more comments:

• The two parts of the string together are never going to exceed N .
• N is a constant value.
• I've already got the two strings, I don't need any date formatting.

Is it posible to do this using Python's string `format ìn a generic way? Something like:

N=80
first_part_of_the_string  = "===>>> [FINISHED] Building sources: " + some_random_text
second_part_of_the_string = my_function_to_convert_time_to_hms(time)

print("{<}{:N>}".format(first_part_of_the_string, second_part_of_the_string))

Answer 1

assuming you know the width of the line you can use '{:n}'.format(string) to fill the string up to n-length with spaces. This does not shorten the string if it is longer than n, as you state will never be the case.

'===>>> [FINISHED] Building sources: {:35} ({})'.format('bla', 'time')

in a similar fashion you can format the time by padding with zeroes: {:02}

hour = 1
minute = 20
second = 30
prefix = '===>>> [FINISHED] Building sources: '
content = 'bla'

time = '({:02}h:{:02}m:{:02}s)'.format(hour, minute, second)
print '{}{:35} {}'.format(prefix, content, time)

printing

'===>>> [FINISHED] Building sources: bla                                 (01h:20m:30s)'

Answer 2

Just one way, adding the right number of spaces...

>>> for a, b in ('fsad', 'trwe'), ('gregrfgsd', '5435234523554'):
        print a + ' ' * (50 - len(a + b)) + b

fsad                                          trwe
gregrfgsd                            5435234523554