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The difference is whether you break old code for users.

• Stampo00 5y ago
  Both would break old code for users. If you don't want to update your code don't update your dependency.
  • neolog 5y ago
    No, installing jinja2 doesn't break my jinja-using code. Installing 2.0 does.
    • one_off_comment 5y ago
      That sounds like a package manager/module system issue, not a library issue. A sound system would let you use both as long as you weren't ambiguous with your imports.