#!/usr/bin/python

# string
str = "String: %s %s" % ('One', 'Two');

str = "String: %10s %10s" % ('One', 'Two'); #       One       Two

str = "String: %-10s %-10s" % ('One', 'Two'); #One       Two       

str = "String: %10.2s %10.2s" % ('One', 'Two'); #        On        Tw

# number
str = "Number: %d %f" % (10, 3.14); # 10 3.140000

str = "Number: %10d %10.2f" % (10, 3.14); #      10      3.14

str = "Number: %010d %010.2f" % (10, 3.14) #0000000010 0000003.14

# named placeholder
d = {'name':'Lin', 'age':37};
str = "%(name)s %(age)d" % d;
		

#!/usr/bin/python

# string
str = "String: {} {}".format('One', 'Two'); #One Two

str = "String: {1} {0}".format('One', 'Two'); #Two One

str = "String: {:>10} {:>10}".format('One', 'Two'); #       One       Two

str = "String: {:^10} {:^10}".format('One', 'Two'); #    One       Two

str = "String: {:<10} {:<10}".format('One', 'Two'); #One       Two

str = "String: {:_<10} {:_<10}".format('One', 'Two'); #One_______ Two_______

str = "String: {:>10.2} {:>10.2}".format('One', 'Two'); #        On        Tw

# number
str = "Number: {:d} {:f}".format(10, 3.14); # 10 3.140000

str = "Number: {:10d} {:10.2f}".format(10, 3.14); #      10      3.14

str = "Number: {:010d} {:010.2f}".format(10, 3.14) #0000000010 0000003.14

# named placeholder
d = {'name':'Lin', 'age':37};
str = "{name} {age}".format(**d);
print str
		

• pyFormat