Python 字符串格式化两种方式

2015-07-01  ·  1 分钟阅读  ·  Python

基本示例

>>> hi='yaung'
>>> ih='zhou'
>>> print "this is {0}".format(hi)

输出：

this is yaung

方式对比

方式一：百分号（%）格式

>>> print 'this is %s' % (hi)
this is yaung
>>> print 'this is %s %s' % (ih,hi)
this is zhou yaung

方式二：format() 方法

>>> print 'this is {1} {0}'.format(hi,ih)
this is zhou yaung

特殊情况：字符串中的 % 符号

如果字符串本身包含 % 字符，使用百分号格式时需要转义（用两个 %）：

>>> print 'i have 100% %s name' % 'english'
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: not all arguments converted during string formatting

# 解决方案：% 转义
>>> print 'i have 100%% %s name' % 'english'
i have 100% english name

# 或者用 format() 方法避免
>>> print 'i have 100% {0} name'.format('english')
i have 100% english name

#python