Created
May 7, 2020 13:00
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Python lib2to3/libfuturize fixer for dict methods
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| """Fixer for some dict methods. | |
| Imports these compat methods from `future.utils` | |
| d.iterkeys() -> iterkeys(d) | |
| d.iteritems() -> iteritems(d) | |
| d.itervalues() -> itervalues(d) | |
| d.viewkeys() -> viewkeys(d) | |
| d.viewitems() -> viewitems(d) | |
| d.viewvalues() -> viewvalues(d) | |
| `futurize -w -n -f <package>.lib.fixes.fix_dict_methods .` | |
| """ | |
| from lib2to3 import pytree | |
| from lib2to3 import fixer_base | |
| from lib2to3.fixer_util import Call, Name | |
| from libfuturize.fixer_util import touch_import_top | |
| class FixDictMethods(fixer_base.BaseFix): | |
| BM_compatible = True | |
| PATTERN = """ | |
| power< head=any+ | |
| trailer< '.' method=('iterkeys'|'iteritems'|'itervalues'| | |
| 'viewkeys'|'viewitems'|'viewvalues') > | |
| parens=trailer< '(' ')' > | |
| tail=any* | |
| > | |
| """ | |
| def transform(self, node, results): | |
| node_type = self.syms.power | |
| head = results["head"] | |
| method = results["method"][0] # Extract node for method name | |
| tail = results["tail"] | |
| method_name = method.value | |
| touch_import_top(u'future.utils', method_name, node) | |
| head = [n.clone() for n in head] | |
| tail = [n.clone() for n in tail] | |
| head[0].prefix = '' | |
| return pytree.Node( | |
| node_type, [Call(Name(method_name), args=head, prefix=node.prefix)] + tail | |
| ) |
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Might be possible to simplify this by removing
tailfrom the PATTERN and return statement, but this works fine for me 🤷♂️