如何使用python-3.x中的字典格式化字符串？ [英] How do I format a string using a dictionary in python-3.x?

问题描述

我是使用字典格式化字符串的大粉丝。它可以帮助我阅读我使用的字符串格式，并让我利用现有的字典。例如：

I am a big fan of using dictionaries to format strings. It helps me read the string format I am using as well as let me take advantage of existing dictionaries. For example:

class MyClass:
    def __init__(self):
        self.title = 'Title'

a = MyClass()
print 'The title is %(title)s' % a.__dict__

path = '/path/to/a/file'
print 'You put your file here: %(path)s' % locals()

但是，我无法弄清python 3.x语法的做法（或者甚至有可能）。我想做以下

However I cannot figure out the python 3.x syntax for doing the same (or if that is even possible). I would like to do the following

# Fails, KeyError 'latitude'
geopoint = {'latitude':41.123,'longitude':71.091}
print '{latitude} {longitude}'.format(geopoint)

# Succeeds
print '{latitude} {longitude}'.format(latitude=41.123,longitude=71.091)

推荐答案

对你有好处

geopoint = {'latitude':41.123,'longitude':71.091}
print('{latitude} {longitude}'.format(**geopoint))

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