4.4 Changelog

Driver Migration Guide

Please read our Driver Migration Guide for guidance and breaking changes when migrating from 1.7 drivers to 4.X drivers.

Changelog

4.4.3

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🔧 Fixes

• Fix wrong serialization of the DateTime type's timezone (#684).

4.4.2

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🔧 Fixes

• Fix the driver sending partial data (causing connection closure and hence slightly worse performance) on errors during data serialization (#641).

⭐ New Features

• Backported (experimental) preview of pandas DataFrame export for results. (#678). Note: the change is self-contained and does not affect any other parts of the driver.

4.4.1

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🔧 Fixes

• Fix pool closing stale connections that are in use (#631). Especially, but not only, in concurrent contexts, this would lead to all sorts of unspecific errors.

👏 Improvements

• Performance improvement when packing data (#622).

4.4.0

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🔧 Fixes

• Fail fast and raise the original error during discovery (initial attempt to connect to the server) on certain errors that are expected to be experienced across all cluster-members ,e.g., Neo.ClientError.Database.DatabaseNotFound and Neo.ClientError.Transaction.InvalidBookmark(#611).
• Fix wrong serialization of the Time type's timezone (#616).

4.4.0b1

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🔧 Fixes

• Use selectors.DefaultSelector instead of select.select which resolves the number of simultaneously open files (including sockets) being limited to 1024 on all operating systems that support it (#604).
• Fixed AttributeError on connection clean-up (#603).

👏 Improvements

• Log the reason when a secure connection could not be established (#608).

4.4.0a1

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⭐ New Features

• Introduce impersonation support (#599).
• Add bearer authentication support (single sign-on) (#579).
• Add Bolt 4.4 support (#560).

🔧 Fixes

• Time types use Decimals and integers instead of floats for sub-seconds (#551).
  This fixes rounding issues and allows for an exact representation of nanoseconds, but comes at the cost of a slightly altered API. Please refer to the documentation.

👏 Improvements

• Fail fast on transaction begin (#586).
• Only send qid parameter over the wire when necessary (#585).
• Reduce the number of RESET messages send over the wire to the bare minimum (#572).
• Fail fast on re-using a broken transaction (#566).

🧹Clean-up

• Drop support for Python 3.5 (end of life 2020-11-13) (#560).