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How to Use MappingProxyType to Create Immutable Dict Views in Python

Create a read-only, immutable view of a dictionary using MappingProxyType from the types module, while the original dict stays mutable.

mappingproxytype dict immutable

Python

from types import MappingProxyType

config = {"debug": True, "port": 8080}

# Create an immutable read-only view of the dict
read_only_config = MappingProxyType(config)

print(f"Read-only value: {read_only_config['debug']}")
print(f"Dict is mapping: {isinstance(read_only_config, dict)}")

# Original dict can still be …

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