Add __future__ import for print_function. It's a no-op in 3.0, but i… · pythoncapi/cpython@8782408 · GitHub
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ericvsmithericvsmith
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Add __future__ import for print_function. It's a no-op in 3.0, but it needs to not be a syntax error.
Closes issue 2436.
1 parent 2eb2c7c commit 8782408

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‎Include/code.h‎

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‎Include/compile.h‎

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@@ -24,6 +24,7 @@ typedef struct {
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#define FUTURE_DIVISION "division"
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#define FUTURE_ABSOLUTE_IMPORT "absolute_import"
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#define FUTURE_WITH_STATEMENT "with_statement"
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#define FUTURE_PRINT_FUNCTION "print_function"
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struct _mod; /* Declare the existence of this type */
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PyAPI_FUNC(PyCodeObject *) PyAST_Compile(struct _mod *, const char *,

‎Lib/__future__.py‎

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@@ -53,6 +53,7 @@
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"division",
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"absolute_import",
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"with_statement",
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"print_function",
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]
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__all__ = ["all_feature_names"] + all_feature_names
@@ -66,6 +67,7 @@
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CO_FUTURE_DIVISION = 0x2000 # division
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CO_FUTURE_ABSOLUTE_IMPORT = 0x4000 # perform absolute imports by default
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CO_FUTURE_WITH_STATEMENT = 0x8000 # with statement
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CO_FUTURE_PRINT_FUNCTION = 0x10000 # print function
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class _Feature:
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def __init__(self, optionalRelease, mandatoryRelease, compiler_flag):
@@ -114,3 +116,7 @@ def __repr__(self):
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with_statement = _Feature((2, 5, 0, "alpha", 1),
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(2, 6, 0, "alpha", 0),
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CO_FUTURE_WITH_STATEMENT)
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print_function = _Feature((2, 6, 0, "alpha", 2),
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(3, 0, 0, "alpha", 0),
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CO_FUTURE_PRINT_FUNCTION)

‎Lib/test/test_print.py‎

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"""Test correct operation of the print function.
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"""
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from __future__ import print_function
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import unittest
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from test import test_support
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@@ -98,6 +100,11 @@ def x(expected, args, sep=NotDefined, end=NotDefined):
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x('*\n', (ClassWith__str__('*'),))
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x('abc 1\n', (ClassWith__str__('abc'), 1))
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# # 2.x unicode tests
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# x(u'1 2\n', ('1', u'2'))
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# x(u'u\1234\n', (u'u\1234',))
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# x(u' abc 1\n', (' ', ClassWith__str__(u'abc'), 1))
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# errors
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self.assertRaises(TypeError, print, '', sep=3)
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self.assertRaises(TypeError, print, '', end=3)

‎Python/future.c‎

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