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J2ee Patterns: Business Tier: Business Deligate

To hide clients from complexity of remote communication with business service components
Minimize coupling between Clients and business services
Translate Network/Look exceptions to application / user exceptions
Introduces one more layer but hides remoteness.
Click here to view class & sequence diagrams of business deligate

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ImportError: cannot import name 'soft_unicode' from 'markupsafe'

Check the markupsafe version.  To fix the problem install 2.0.1 pip install markupsafe==2.0.1