File: readonlydict.py

package info (click to toggle)
thunderbird 1%3A143.0.1-1
  • links: PTS, VCS
  • area: main
  • in suites: experimental
  • size: 4,703,968 kB
  • sloc: cpp: 7,770,492; javascript: 5,943,842; ansic: 3,918,754; python: 1,418,263; xml: 653,354; asm: 474,045; java: 183,079; sh: 111,238; makefile: 20,410; perl: 14,359; objc: 13,059; yacc: 4,583; pascal: 3,405; lex: 1,720; ruby: 999; exp: 762; sql: 715; awk: 580; php: 436; lisp: 430; sed: 69; csh: 10
file content (41 lines) | stat: -rw-r--r-- 1,223 bytes parent folder | download | duplicates (15) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
 
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this file,
# You can obtain one at http://mozilla.org/MPL/2.0/.

# Imported from
# https://searchfox.org/mozilla-central/rev/ece43b04e7baa4680dac46a06d5ad42b27b124f4/python/mozbuild/mozbuild/util.py#102

import copy


class ReadOnlyDict(dict):
    """A read-only dictionary."""

    def __init__(self, *args, **kwargs):
        dict.__init__(self, *args, **kwargs)

    def __delitem__(self, key):
        raise Exception("Object does not support deletion.")

    def __setitem__(self, key, value):
        raise Exception("Object does not support assignment.")

    def update(self, *args, **kwargs):
        raise Exception("Object does not support update.")

    def __copy__(self, *args, **kwargs):
        return ReadOnlyDict(**dict.copy(self, *args, **kwargs))

    def __deepcopy__(self, memo):
        result = {}
        for k, v in self.items():
            result[k] = copy.deepcopy(v, memo)

        return ReadOnlyDict(**result)

    def __reduce__(self, *args, **kwargs):
        """
        Support for `pickle`.
        """

        return (self.__class__, (dict(self),))