Requirements.txt 大于等于然后小于？

Question

I have this line in my requirements file

django>=1.10,<1.11

Does that mean I need to have Django version >= 1.10 and then less than 1.11 ?

Answer 1

Yes . The pip manual [doc] has a section on the format of " requirement specifiers ". These are documented in PEP-508 [pep] and PEP-440 [pep] :

The comparison operator determines the kind of version clause:

1. ~= : Compatible release clause
2. == : Version matching clause
3. != : Version exclusion clause
4. <= , >= : Inclusive ordered comparison clause
5. < , > : Exclusive ordered comparison clause
6. === : Arbitrary equality clause.

The comma ( "," ) is equivalent to a logical and operator: a candidate version must match all given version clauses in order to match the specifier as a whole.

So in your case it means that the Django version is 1.10 or higher and not 1.11 or higher (so 1.10 is fine, 1.10.1 , as well, but not 1.11 , 1.11.1 , or 2.0.1 ).