mirror of
https://github.com/Sneed-Group/Poodletooth-iLand
synced 2024-11-01 01:07:54 +00:00
152 lines
4.8 KiB
Python
152 lines
4.8 KiB
Python
"""Adjust some old Python 2 idioms to their modern counterparts.
|
|
|
|
* Change some type comparisons to isinstance() calls:
|
|
type(x) == T -> isinstance(x, T)
|
|
type(x) is T -> isinstance(x, T)
|
|
type(x) != T -> not isinstance(x, T)
|
|
type(x) is not T -> not isinstance(x, T)
|
|
|
|
* Change "while 1:" into "while True:".
|
|
|
|
* Change both
|
|
|
|
v = list(EXPR)
|
|
v.sort()
|
|
foo(v)
|
|
|
|
and the more general
|
|
|
|
v = EXPR
|
|
v.sort()
|
|
foo(v)
|
|
|
|
into
|
|
|
|
v = sorted(EXPR)
|
|
foo(v)
|
|
"""
|
|
# Author: Jacques Frechet, Collin Winter
|
|
|
|
# Local imports
|
|
from .. import fixer_base
|
|
from ..fixer_util import Call, Comma, Name, Node, BlankLine, syms
|
|
|
|
CMP = "(n='!=' | '==' | 'is' | n=comp_op< 'is' 'not' >)"
|
|
TYPE = "power< 'type' trailer< '(' x=any ')' > >"
|
|
|
|
class FixIdioms(fixer_base.BaseFix):
|
|
explicit = True # The user must ask for this fixer
|
|
|
|
PATTERN = r"""
|
|
isinstance=comparison< %s %s T=any >
|
|
|
|
|
isinstance=comparison< T=any %s %s >
|
|
|
|
|
while_stmt< 'while' while='1' ':' any+ >
|
|
|
|
|
sorted=any<
|
|
any*
|
|
simple_stmt<
|
|
expr_stmt< id1=any '='
|
|
power< list='list' trailer< '(' (not arglist<any+>) any ')' > >
|
|
>
|
|
'\n'
|
|
>
|
|
sort=
|
|
simple_stmt<
|
|
power< id2=any
|
|
trailer< '.' 'sort' > trailer< '(' ')' >
|
|
>
|
|
'\n'
|
|
>
|
|
next=any*
|
|
>
|
|
|
|
|
sorted=any<
|
|
any*
|
|
simple_stmt< expr_stmt< id1=any '=' expr=any > '\n' >
|
|
sort=
|
|
simple_stmt<
|
|
power< id2=any
|
|
trailer< '.' 'sort' > trailer< '(' ')' >
|
|
>
|
|
'\n'
|
|
>
|
|
next=any*
|
|
>
|
|
""" % (TYPE, CMP, CMP, TYPE)
|
|
|
|
def match(self, node):
|
|
r = super(FixIdioms, self).match(node)
|
|
# If we've matched one of the sort/sorted subpatterns above, we
|
|
# want to reject matches where the initial assignment and the
|
|
# subsequent .sort() call involve different identifiers.
|
|
if r and "sorted" in r:
|
|
if r["id1"] == r["id2"]:
|
|
return r
|
|
return None
|
|
return r
|
|
|
|
def transform(self, node, results):
|
|
if "isinstance" in results:
|
|
return self.transform_isinstance(node, results)
|
|
elif "while" in results:
|
|
return self.transform_while(node, results)
|
|
elif "sorted" in results:
|
|
return self.transform_sort(node, results)
|
|
else:
|
|
raise RuntimeError("Invalid match")
|
|
|
|
def transform_isinstance(self, node, results):
|
|
x = results["x"].clone() # The thing inside of type()
|
|
T = results["T"].clone() # The type being compared against
|
|
x.prefix = u""
|
|
T.prefix = u" "
|
|
test = Call(Name(u"isinstance"), [x, Comma(), T])
|
|
if "n" in results:
|
|
test.prefix = u" "
|
|
test = Node(syms.not_test, [Name(u"not"), test])
|
|
test.prefix = node.prefix
|
|
return test
|
|
|
|
def transform_while(self, node, results):
|
|
one = results["while"]
|
|
one.replace(Name(u"True", prefix=one.prefix))
|
|
|
|
def transform_sort(self, node, results):
|
|
sort_stmt = results["sort"]
|
|
next_stmt = results["next"]
|
|
list_call = results.get("list")
|
|
simple_expr = results.get("expr")
|
|
|
|
if list_call:
|
|
list_call.replace(Name(u"sorted", prefix=list_call.prefix))
|
|
elif simple_expr:
|
|
new = simple_expr.clone()
|
|
new.prefix = u""
|
|
simple_expr.replace(Call(Name(u"sorted"), [new],
|
|
prefix=simple_expr.prefix))
|
|
else:
|
|
raise RuntimeError("should not have reached here")
|
|
sort_stmt.remove()
|
|
|
|
btwn = sort_stmt.prefix
|
|
# Keep any prefix lines between the sort_stmt and the list_call and
|
|
# shove them right after the sorted() call.
|
|
if u"\n" in btwn:
|
|
if next_stmt:
|
|
# The new prefix should be everything from the sort_stmt's
|
|
# prefix up to the last newline, then the old prefix after a new
|
|
# line.
|
|
prefix_lines = (btwn.rpartition(u"\n")[0], next_stmt[0].prefix)
|
|
next_stmt[0].prefix = u"\n".join(prefix_lines)
|
|
else:
|
|
assert list_call.parent
|
|
assert list_call.next_sibling is None
|
|
# Put a blank line after list_call and set its prefix.
|
|
end_line = BlankLine()
|
|
list_call.parent.append_child(end_line)
|
|
assert list_call.next_sibling is end_line
|
|
# The new prefix should be everything up to the first new line
|
|
# of sort_stmt's prefix.
|
|
end_line.prefix = btwn.rpartition(u"\n")[0]
|