Mercurial > repos > shellac > guppy_basecaller
comparison env/lib/python3.7/site-packages/libfuturize/fixes/fix_print.py @ 0:26e78fe6e8c4 draft
"planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
| author | shellac |
|---|---|
| date | Sat, 02 May 2020 07:14:21 -0400 |
| parents | |
| children |
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| -1:000000000000 | 0:26e78fe6e8c4 |
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| 1 # Copyright 2006 Google, Inc. All Rights Reserved. | |
| 2 # Licensed to PSF under a Contributor Agreement. | |
| 3 | |
| 4 """Fixer for print. | |
| 5 | |
| 6 Change: | |
| 7 "print" into "print()" | |
| 8 "print ..." into "print(...)" | |
| 9 "print(...)" not changed | |
| 10 "print ... ," into "print(..., end=' ')" | |
| 11 "print >>x, ..." into "print(..., file=x)" | |
| 12 | |
| 13 No changes are applied if print_function is imported from __future__ | |
| 14 | |
| 15 """ | |
| 16 | |
| 17 # Local imports | |
| 18 from lib2to3 import patcomp, pytree, fixer_base | |
| 19 from lib2to3.pgen2 import token | |
| 20 from lib2to3.fixer_util import Name, Call, Comma, String | |
| 21 # from libmodernize import add_future | |
| 22 | |
| 23 parend_expr = patcomp.compile_pattern( | |
| 24 """atom< '(' [arith_expr|atom|power|term|STRING|NAME] ')' >""" | |
| 25 ) | |
| 26 | |
| 27 | |
| 28 class FixPrint(fixer_base.BaseFix): | |
| 29 | |
| 30 BM_compatible = True | |
| 31 | |
| 32 PATTERN = """ | |
| 33 simple_stmt< any* bare='print' any* > | print_stmt | |
| 34 """ | |
| 35 | |
| 36 def transform(self, node, results): | |
| 37 assert results | |
| 38 | |
| 39 bare_print = results.get("bare") | |
| 40 | |
| 41 if bare_print: | |
| 42 # Special-case print all by itself. | |
| 43 bare_print.replace(Call(Name(u"print"), [], | |
| 44 prefix=bare_print.prefix)) | |
| 45 # The "from __future__ import print_function"" declaration is added | |
| 46 # by the fix_print_with_import fixer, so we skip it here. | |
| 47 # add_future(node, u'print_function') | |
| 48 return | |
| 49 assert node.children[0] == Name(u"print") | |
| 50 args = node.children[1:] | |
| 51 if len(args) == 1 and parend_expr.match(args[0]): | |
| 52 # We don't want to keep sticking parens around an | |
| 53 # already-parenthesised expression. | |
| 54 return | |
| 55 | |
| 56 sep = end = file = None | |
| 57 if args and args[-1] == Comma(): | |
| 58 args = args[:-1] | |
| 59 end = " " | |
| 60 if args and args[0] == pytree.Leaf(token.RIGHTSHIFT, u">>"): | |
| 61 assert len(args) >= 2 | |
| 62 file = args[1].clone() | |
| 63 args = args[3:] # Strip a possible comma after the file expression | |
| 64 # Now synthesize a print(args, sep=..., end=..., file=...) node. | |
| 65 l_args = [arg.clone() for arg in args] | |
| 66 if l_args: | |
| 67 l_args[0].prefix = u"" | |
| 68 if sep is not None or end is not None or file is not None: | |
| 69 if sep is not None: | |
| 70 self.add_kwarg(l_args, u"sep", String(repr(sep))) | |
| 71 if end is not None: | |
| 72 self.add_kwarg(l_args, u"end", String(repr(end))) | |
| 73 if file is not None: | |
| 74 self.add_kwarg(l_args, u"file", file) | |
| 75 n_stmt = Call(Name(u"print"), l_args) | |
| 76 n_stmt.prefix = node.prefix | |
| 77 | |
| 78 # Note that there are corner cases where adding this future-import is | |
| 79 # incorrect, for example when the file also has a 'print ()' statement | |
| 80 # that was intended to print "()". | |
| 81 # add_future(node, u'print_function') | |
| 82 return n_stmt | |
| 83 | |
| 84 def add_kwarg(self, l_nodes, s_kwd, n_expr): | |
| 85 # XXX All this prefix-setting may lose comments (though rarely) | |
| 86 n_expr.prefix = u"" | |
| 87 n_argument = pytree.Node(self.syms.argument, | |
| 88 (Name(s_kwd), | |
| 89 pytree.Leaf(token.EQUAL, u"="), | |
| 90 n_expr)) | |
| 91 if l_nodes: | |
| 92 l_nodes.append(Comma()) | |
| 93 n_argument.prefix = u" " | |
| 94 l_nodes.append(n_argument) |