On 20/06/11 20:14:46, Tim Johnson wrote:
Currently using python 2.6, but am serving some systems that have
older versions of python (no earlier than.
Question 1:
With what version of python was str.format() first implemented?
That was 2.6, according to the online docs.
Take a look at the documentation that came with your Python
installation. The documentation for str.format ends with:
"New in version 2.6."
Question 2:
Given the following string:
S = 'Coordinates: {latitude}, {longitude}'
Is there a python library that would provide an optimal way
to parse from S the following
{'latitude':"",'longitude':""}
?
Opinions differ. Some people would use the 're' module:
import re
S = 'Coordinates: {latitude}, {longitude}'
keys = re.findall(r'{(\w+)}', S)
print '{' + ', '.join("'" + k + '\':""' for k in keys) + '}'
Other people prefer to use string methods:
S = 'Coordinates: {latitude}, {longitude}'
start = -1
keys = []
while True:
start = S.find('{', start+1)
if start == -1:
break
end = S.find('}', start)
if end > start:
keys.append(S[start+1:end])
print '{' + ', '.join("'" + k + '\':""' for k in keys) + '}'
It might be a matter of taste; it might depend on how familiar
you are with 're'; it might depend on what you mean by 'optimal'.
-- HansM
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