python中的print

python2.x  --->  print不是个函数  ，无法使用help(print) 查看帮助

python3.x ----> print()是一个函数，查看帮助如下：

>>> help(print)
Help on built-in function print in module builtins:

print(...)
print(value, ..., sep=' ', end=' ', file=sys.stdout, flush=False)    #默认分割符合是以' '做分割，默认结束符合是以' '换行分割的

Prints the values to a stream, or to sys.stdout by default.
Optional keyword arguments:
file: a file-like object (stream); defaults to the current sys.stdout.
sep: string inserted between values, default a space.
end: string appended after the last value, default a newline.
flush: whether to forcibly flush the stream.

使用print输入示例：

python2.x

>>> print("a")
a
>>> print "a"
a
>>> print "a","b"
a b
>>> print "小范"
小范

python3.x：

>>> print("a","b")
a b
>>> print("a","b",end="-------")
a b------->>>
>>> print("a","b",end="")
a b>>>

>>> print("小范")
小范