When comparing Kdevelop with kdev-python vs PyScripter, the Slant community recommends PyScripter for most people. In the question“What are the best Python IDEs or editors?” PyScripter is ranked 8th while Kdevelop with kdev-python is ranked 14th. The most important reason people chose PyScripter is:
PyScripter is a lightweight Python IDE.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Excellent syntax highlighting
Kdevelop has very smart syntax and semantic syntax highlighting.

Pro Real-time static analysis
Kdevelop has a pretty powerful and sophisticated implementation of static analysis for Python. It's capable of pretty good type inference, tracking types and the expected groking of inheritance trees.
Pro Lightweight
PyScripter is a lightweight Python IDE.
Pro Easy to use
Covers the needs of advanced users (thread debugging, unit testing etc.)
Cons
Con Works with no problems only on Linux
KDevelop is an IDE for the KDE platform. Even though it's cross-platform, it's mostly targeted at Linux systems and the versions for other operating systems are highly experimental.
Con Windows only
Available for Windows only.