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annotate env/lib/python3.7/site-packages/libpasteurize/fixes/fix_annotations.py @ 0:26e78fe6e8c4 draft

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"planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
author shellac
date Sat, 02 May 2020 07:14:21 -0400
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1 u"""
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2 Fixer to remove function annotations
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3 """
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4
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5 from lib2to3 import fixer_base
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6 from lib2to3.pgen2 import token
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7 from lib2to3.fixer_util import syms
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8
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9 warning_text = u"Removing function annotations completely."
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10
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11 def param_without_annotations(node):
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12 return node.children[0]
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13
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14 class FixAnnotations(fixer_base.BaseFix):
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15
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16 warned = False
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17
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18 def warn_once(self, node, reason):
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19 if not self.warned:
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20 self.warned = True
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21 self.warning(node, reason=reason)
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22
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23 PATTERN = u"""
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24 funcdef< 'def' any parameters< '(' [params=any] ')' > ['->' ret=any] ':' any* >
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25 """
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26
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27 def transform(self, node, results):
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28 u"""
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29 This just strips annotations from the funcdef completely.
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30 """
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31 params = results.get(u"params")
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32 ret = results.get(u"ret")
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33 if ret is not None:
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34 assert ret.prev_sibling.type == token.RARROW, u"Invalid return annotation"
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35 self.warn_once(node, reason=warning_text)
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36 ret.prev_sibling.remove()
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37 ret.remove()
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38 if params is None: return
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39 if params.type == syms.typedargslist:
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40 # more than one param in a typedargslist
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41 for param in params.children:
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42 if param.type == syms.tname:
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43 self.warn_once(node, reason=warning_text)
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44 param.replace(param_without_annotations(param))
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45 elif params.type == syms.tname:
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46 # one param
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47 self.warn_once(node, reason=warning_text)
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48 params.replace(param_without_annotations(params))