New submission from Jeong-Min Lee:
lambda (x): x
should be transformed to
lambda x: x
not
lambda x1: x1[0]
----------
components: Demos and Tools
files: 2to3_lambda_nontuple_param.diff
messages: 55654
nosy: falsetru, gvanrossum
severity: normal
status: open
title: [patch] 2to3, lambda with non-tuple argument inside parenthesis
__________________________________
Tracker <[EMAIL PROTECTED]>
<http://bugs.python.org/issue1107>
__________________________________
Index: tests/test_fixers.py
===================================================================
--- tests/test_fixers.py (revision 57982)
+++ tests/test_fixers.py (working copy)
@@ -1527,6 +1527,16 @@
s = """lambda x: x + 5"""
self.unchanged(s)
+ def test_lambda_single_nontuple_argument_inside_parenthesis(self):
+ b = """lambda (x): x"""
+ a = """lambda x: x"""
+ self.check(b, a)
+
+ def test_lambda_single_tuple_argument_inside_parenthesis(self):
+ b = """lambda (x,): x"""
+ a = """lambda x1: x1[0]"""
+ self.check(b, a)
+
def test_lambda_simple(self):
b = """lambda (x, y): x + f(y)"""
a = """lambda x_y: x_y[0] + f(x_y[1])"""
Index: fixes/fix_tuple_params.py
===================================================================
--- fixes/fix_tuple_params.py (revision 57982)
+++ fixes/fix_tuple_params.py (working copy)
@@ -99,6 +99,12 @@
body = results["body"]
params = find_params(args)
+ if not isinstance(params, list):
+ new_param = Name(params)
+ new_param.set_prefix(args.get_prefix())
+ args.replace(new_param.clone())
+ return
+
to_index = map_to_index(params)
tup_name = self.new_name(tuple_name(params))
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