In [1]: print( "hello world")
hello world
In [2]: print( " i %d x %g " % (3, 3.14))
i 3 x 3.14
In [3]: a = 12.345678901234
In [4]: print( "%s" % "{}".format(a))
12.3456789012
In [5]: print( repr(a))
12.345678901234
In [6]: print( "%g" % a)
12.3457
Whenever print thinks that the current writing position is somewhere in the middle of a line, it adds a leading blank. This can be avoided by using sys.stdout.write.