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Python 3.0 comprehensions are a snowflake

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rocky
2018-06-24 16:46:56 -04:00
parent 4cbd136635
commit 93e889e82a
2 changed files with 43 additions and 7 deletions
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11
uncompyle6/parsers/parse30.py
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@@ -64,6 +64,17 @@ class Python30Parser(Python31Parser):
LOAD_FAST FOR_ITER store comp_iter
JUMP_BACK
set_comp_header ::= BUILD_SET_0 DUP_TOP STORE_FAST
set_comp ::= set_comp_header
LOAD_FAST FOR_ITER store comp_iter
JUMP_BACK
dict_comp_header ::= BUILD_MAP_0 DUP_TOP STORE_FAST
dict_comp ::= dict_comp_header
LOAD_FAST FOR_ITER store dict_comp_iter
JUMP_BACK
dict_comp_iter ::= expr expr ROT_TWO expr STORE_SUBSCR
# JUMP_IF_TRUE POP_TOP as a replacement
comp_if ::= expr jmp_false comp_iter

29
uncompyle6/semantics/pysource.py
View File

@@ -1051,10 +1051,15 @@ class SourceWalker(GenericASTTraversal, object):
self.prec=100
ast = ast[0]
# Pick out important parts of the comprehension:
# * the variable we interate over: "store"
# * the results we accumulate: "n"
is_30_dict_comp = False
store = None
n = ast[iter_index]
if ast in ['set_comp_func', 'dict_comp_func',
'list_comp', 'set_comp_func_header']:
if ast in ('set_comp_func', 'dict_comp_func',
'list_comp', 'set_comp_func_header'):
for k in ast:
if k == 'comp_iter':
n = k
@@ -1063,6 +1068,21 @@ class SourceWalker(GenericASTTraversal, object):
pass
pass
pass
elif ast in ('dict_comp', 'set_comp'):
assert self.version == 3.0
for k in ast:
if k in ('dict_comp_header', 'set_comp_header'):
n = k
elif k == 'store':
store = k
elif k == 'dict_comp_iter':
is_30_dict_comp = True
n = (k[3], k[1])
pass
elif k == 'comp_iter':
n = k[1]
pass
pass
else:
assert n == 'list_iter', n
@@ -1115,6 +1135,11 @@ class SourceWalker(GenericASTTraversal, object):
# Another approach might be to be able to pass in the source name
# for the dummy argument.
if is_30_dict_comp:
self.preorder(n[0])
self.write(': ')
self.preorder(n[1])
else:
self.preorder(n[0])
self.write(' for ')
if comp_store: