Python: 消除print的自动换行

来源:互联网 发布:淘宝无线套餐链接转换 编辑:程序博客网 时间:2024/06/09 13:46

Python: 消除print换行

标签:python print \n

by 小威威


对于python2.X,要消除print的自动换行,只需在print尾部加上一个逗号”,”,但是这一做法在python3.X就不适用了,这是为什么呢?我们可以在交互式的环境下输入help(print),查询print的原理和使用方法。

Help on built-in function print in module builtins:

print(…)
print(value, …, sep=’ ‘, end=’\n’, file=sys.stdout, flush=False)

appledeMacBook-Pro-2:Desktop apple$ python3Python 3.5.0 (v3.5.0:374f501f4567, Sep 12 2015, 11:00:19) [GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwinType "help", "copyright", "credits" or "license" for more information.>>> help(print)Help on built-in function print in module builtins:print(...)    print(value, ..., sep=' ', end='\n', file=sys.stdout, flush=False)    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.(END) 

注意看这一句:

print(value, ..., sep=' ', end='\n', file=sys.stdout, flush=False)

这一句说明在python3中print是一个函数,对于函数,其形参中有默认参数和关键参数。我们发现,在结尾处出现了end = ‘\n’,说明print是以\n结束的,end是默认参数。只要我们在print中将默认参数的值改为空或者空格,就能实现不换行。

举个栗子:

#!/usr/bin/python3# Filename: using_list.py# This is my shopping listshoplist = ['apple', 'mango', 'carrot', 'banana']print ('These items are:')for i in shoplist:    print (i,end=' ')# End

输出结果如下:

These items are:apple mango carrot banana 

以上内容皆为本人观点,欢迎大家提出批评和指导,我们一起探讨。


0 0