On 12/16/2014 06:48 PM, Donald Stufft wrote: > > Now if you have 1.3+debian1 installed via apt-get (or any means really), and > you’ll get the following behaviors (show with pip): > > - pip install yourthing -> 1.3+debian1 satisfies the constraint of anything, > so it stays installed. > - pip install yourthing==1.3 -> 1.3+debian1 satisfies the constraint of > ==1.3, so it stays installed. > - pip install yourthing>=1.3 -> 1.3+debian1 satisfies the constraint of >= > 1.3, so it stays installed. > - pip install yourthing>=1.4 -> 1.3+debian1 does not satisfy the constraint > of >=1.4, so pip will upgrade it to 1.4. > - pip install —upgrade youthing -> You’ve requested an upgrade, so pip will > see 1.4 exists and will install it. > - pip install —upgrade yourthing==1.3 -> You’ve requested an upgrade, but > there’s nothing newer than 1.3+debian1 that matches the constraint so it > stays installed > - pip install -upgrade youthing>=1.3 -> You’ve requested an upgrade, pip will > see 1.4 exists and satisfies the constraint and will install it. > - pip install —upgrade yourthing>1.4 -> you’ve requested an upgrade and > 1.3+debian1 is not >= 1.4, so pip will see 1.4 exists and install it. > > Does that make sense?
Yes. Thank you for that _very_ thorough explanation. :) To continue with Maurits' use-case, in order to get /exactly/ 1.3, '===' is the operator to use? Or are we still discussing that? Personally, I think pip install yourthing is 1.3 ;) -- ~Ethan~
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