Python string interpolation using dictionary and strings

Question

Given:

dict = {\"path\": \"/var/blah\"}
curr = \"1.1\"
prev = \"1.0\"

What\'s the best/shortest way to interpolate the string to generate t

Answer 1

And of course you could use the newer (from 2.6) .format string method:

>>> mydict = {"path": "/var/blah"}
>>> curr = "1.1"
>>> prev = "1.0"
>>>
>>> s = "path: {0} curr: {1} prev: {2}".format(mydict['path'], curr, prev)
>>> s
'path: /var/blah curr: 1.1 prev: 1.0'   

Or, if all elements were in the dictionary, you could do this:

>>> mydict = {"path": "/var/blah", "curr": 1.1, "prev": 1.0}
>>> "path: {path} curr: {curr} prev: {prev}".format(**mydict)
'path: /var/blah curr: 1.1 prev: 1.0'
>>>

From the str.format() documentation:

This method of string formatting is the new standard in Python 3.0, and should be preferred to the % formatting described in String Formatting Operations in new code.