Hi I am trying to understand how the string formatting works with float:
I have tried
>>> print("%s %s %s %s %-9.10f"%("this","is","monday","morning",56.3648)) it gives output of
this is monday morning 56.3648000000 however this,
>>> print("%s %s %s %s %10f"%("this","is","monday","morning",56.3648)) gives output of
this is monday morning 56.364800 what is causing the difference?
The way the pattern strings are parsed. %9.10f sets the (minimum) field width to 9 and the precision to 10, while %10f only sets the width to 10. I think you meant to write %.10f instead:
In [4]: '%10f' % 56.3648 # width Out[4]: ' 56.364800' In [5]: '%.10f' % 56.3648 # precision Out[5]: '56.3648000000' Also, consider using the newer str.format formatting style. Your first example would turn into
In [6]: '{} {} {} {} {:<9.10f}'.format('this', 'is', 'monday', 'morning', 56.3648) Out[6]: 'this is monday morning 56.3648000000' 