Mercurial > cpython-lru_cache-weakref

annotate Lib/test/test_ast.py @ 54294:dba767bc3155 legacy-trunk

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remove mention of old ctypes version
author Benjamin Peterson <benjamin@python.org>
date Sat, 23 May 2009 20:59:09 +0000
parents 6e33aeaee77d
children 0c357e3fc3d0
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 import sys, itertools, unittest
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2 from test import test_support
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3 import ast
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4
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5 def to_tuple(t):
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6 if t is None or isinstance(t, (basestring, int, long, complex)):
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7 return t
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8 elif isinstance(t, list):
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9 return [to_tuple(e) for e in t]
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10 result = [t.__class__.__name__]
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11 if hasattr(t, 'lineno') and hasattr(t, 'col_offset'):
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12 result.append((t.lineno, t.col_offset))
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13 if t._fields is None:
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14 return tuple(result)
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15 for f in t._fields:
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16 result.append(to_tuple(getattr(t, f)))
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17 return tuple(result)
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18
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19
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20 # These tests are compiled through "exec"
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21 # There should be atleast one test per statement
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22 exec_tests = [
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23 # FunctionDef
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24 "def f(): pass",
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25 # ClassDef
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26 "class C:pass",
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27 # Return
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28 "def f():return 1",
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29 # Delete
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30 "del v",
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31 # Assign
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32 "v = 1",
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33 # AugAssign
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34 "v += 1",
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35 # Print
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36 "print >>f, 1, ",
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37 # For
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38 "for v in v:pass",
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39 # While
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40 "while v:pass",
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41 # If
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42 "if v:pass",
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43 # Raise
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44 "raise Exception, 'string'",
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45 # TryExcept
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46 "try:\n pass\nexcept Exception:\n pass",
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47 # TryFinally
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48 "try:\n pass\nfinally:\n pass",
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49 # Assert
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50 "assert v",
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51 # Import
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52 "import sys",
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53 # ImportFrom
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54 "from sys import v",
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55 # Exec
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56 "exec 'v'",
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57 # Global
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58 "global v",
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59 # Expr
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60 "1",
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61 # Pass,
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62 "pass",
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63 # Break
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64 "break",
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65 # Continue
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66 "continue",
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67 ]
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68
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69 # These are compiled through "single"
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70 # because of overlap with "eval", it just tests what
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71 # can't be tested with "eval"
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72 single_tests = [
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73 "1+2"
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74 ]
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75
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76 # These are compiled through "eval"
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77 # It should test all expressions
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78 eval_tests = [
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79 # BoolOp
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80 "a and b",
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81 # BinOp
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82 "a + b",
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83 # UnaryOp
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84 "not v",
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85 # Lambda
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86 "lambda:None",
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87 # Dict
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88 "{ 1:2 }",
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89 # ListComp
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90 "[a for b in c if d]",
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91 # GeneratorExp
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92 "(a for b in c if d)",
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93 # Yield - yield expressions can't work outside a function
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94 #
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95 # Compare
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96 "1 < 2 < 3",
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97 # Call
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98 "f(1,2,c=3,*d,**e)",
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99 # Repr
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100 "`v`",
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101 # Num
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102 "10L",
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103 # Str
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104 "'string'",
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105 # Attribute
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106 "a.b",
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107 # Subscript
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108 "a[b:c]",
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109 # Name
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110 "v",
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111 # List
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112 "[1,2,3]",
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113 # Tuple
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114 "1,2,3",
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115 # Combination
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116 "a.b.c.d(a.b[1:2])",
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117
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118 ]
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119
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120 # TODO: expr_context, slice, boolop, operator, unaryop, cmpop, comprehension
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121 # excepthandler, arguments, keywords, alias
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122
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123 class AST_Tests(unittest.TestCase):
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124
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125 def _assert_order(self, ast_node, parent_pos):
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126 if not isinstance(ast_node, ast.AST) or ast_node._fields is None:
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127 return
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128 if isinstance(ast_node, (ast.expr, ast.stmt, ast.excepthandler)):
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129 node_pos = (ast_node.lineno, ast_node.col_offset)
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130 self.assert_(node_pos >= parent_pos)
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131 parent_pos = (ast_node.lineno, ast_node.col_offset)
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132 for name in ast_node._fields:
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133 value = getattr(ast_node, name)
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134 if isinstance(value, list):
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135 for child in value:
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136 self._assert_order(child, parent_pos)
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137 elif value is not None:
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138 self._assert_order(value, parent_pos)
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139
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140 def test_snippets(self):
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141 for input, output, kind in ((exec_tests, exec_results, "exec"),
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142 (single_tests, single_results, "single"),
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143 (eval_tests, eval_results, "eval")):
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144 for i, o in itertools.izip(input, output):
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145 ast_tree = compile(i, "?", kind, ast.PyCF_ONLY_AST)
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146 self.assertEquals(to_tuple(ast_tree), o)
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147 self._assert_order(ast_tree, (0, 0))
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148
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149 def test_nodeclasses(self):
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150 x = ast.BinOp(1, 2, 3, lineno=0)
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151 self.assertEquals(x.left, 1)
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152 self.assertEquals(x.op, 2)
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153 self.assertEquals(x.right, 3)
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154 self.assertEquals(x.lineno, 0)
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155
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156 # node raises exception when not given enough arguments
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157 self.assertRaises(TypeError, ast.BinOp, 1, 2)
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158
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159 # can set attributes through kwargs too
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160 x = ast.BinOp(left=1, op=2, right=3, lineno=0)
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161 self.assertEquals(x.left, 1)
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162 self.assertEquals(x.op, 2)
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163 self.assertEquals(x.right, 3)
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164 self.assertEquals(x.lineno, 0)
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165
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166 # this used to fail because Sub._fields was None
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167 x = ast.Sub()
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168
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169 def test_pickling(self):
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170 import pickle
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171 mods = [pickle]
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172 try:
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173 import cPickle
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174 mods.append(cPickle)
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175 except ImportError:
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176 pass
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177 protocols = [0, 1, 2]
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178 for mod in mods:
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179 for protocol in protocols:
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180 for ast in (compile(i, "?", "exec", 0x400) for i in exec_tests):
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181 ast2 = mod.loads(mod.dumps(ast, protocol))
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182 self.assertEquals(to_tuple(ast2), to_tuple(ast))
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183
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184
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185 class ASTHelpers_Test(unittest.TestCase):
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186
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187 def test_parse(self):
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188 a = ast.parse('foo(1 + 1)')
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189 b = compile('foo(1 + 1)', '<unknown>', 'exec', ast.PyCF_ONLY_AST)
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190 self.assertEqual(ast.dump(a), ast.dump(b))
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191
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192 def test_dump(self):
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193 node = ast.parse('spam(eggs, "and cheese")')
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194 self.assertEqual(ast.dump(node),
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195 "Module(body=[Expr(value=Call(func=Name(id='spam', ctx=Load()), "
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196 "args=[Name(id='eggs', ctx=Load()), Str(s='and cheese')], "
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197 "keywords=[], starargs=None, kwargs=None))])"
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198 )
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199 self.assertEqual(ast.dump(node, annotate_fields=False),
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200 "Module([Expr(Call(Name('spam', Load()), [Name('eggs', Load()), "
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diff changeset
201 "Str('and cheese')], [], None, None))])"
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202 )
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203 self.assertEqual(ast.dump(node, include_attributes=True),
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204 "Module(body=[Expr(value=Call(func=Name(id='spam', ctx=Load(), "
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205 "lineno=1, col_offset=0), args=[Name(id='eggs', ctx=Load(), "
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206 "lineno=1, col_offset=5), Str(s='and cheese', lineno=1, "
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diff changeset
207 "col_offset=11)], keywords=[], starargs=None, kwargs=None, "
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208 "lineno=1, col_offset=0), lineno=1, col_offset=0)])"
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209 )
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210
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211 def test_copy_location(self):
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212 src = ast.parse('1 + 1', mode='eval')
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213 src.body.right = ast.copy_location(ast.Num(2), src.body.right)
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214 self.assertEqual(ast.dump(src, include_attributes=True),
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215 'Expression(body=BinOp(left=Num(n=1, lineno=1, col_offset=0), '
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216 'op=Add(), right=Num(n=2, lineno=1, col_offset=4), lineno=1, '
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diff changeset
217 'col_offset=0))'
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218 )
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219
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220 def test_fix_missing_locations(self):
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221 src = ast.parse('write("spam")')
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222 src.body.append(ast.Expr(ast.Call(ast.Name('spam', ast.Load()),
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223 [ast.Str('eggs')], [], None, None)))
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224 self.assertEqual(src, ast.fix_missing_locations(src))
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225 self.assertEqual(ast.dump(src, include_attributes=True),
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226 "Module(body=[Expr(value=Call(func=Name(id='write', ctx=Load(), "
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227 "lineno=1, col_offset=0), args=[Str(s='spam', lineno=1, "
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diff changeset
228 "col_offset=6)], keywords=[], starargs=None, kwargs=None, "
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diff changeset
229 "lineno=1, col_offset=0), lineno=1, col_offset=0), "
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230 "Expr(value=Call(func=Name(id='spam', ctx=Load(), lineno=1, "
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diff changeset
231 "col_offset=0), args=[Str(s='eggs', lineno=1, col_offset=0)], "
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diff changeset
232 "keywords=[], starargs=None, kwargs=None, lineno=1, "
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diff changeset
233 "col_offset=0), lineno=1, col_offset=0)])"
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234 )
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235
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236 def test_increment_lineno(self):
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237 src = ast.parse('1 + 1', mode='eval')
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238 self.assertEqual(ast.increment_lineno(src, n=3), src)
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diff changeset
239 self.assertEqual(ast.dump(src, include_attributes=True),
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diff changeset
240 'Expression(body=BinOp(left=Num(n=1, lineno=4, col_offset=0), '
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diff changeset
241 'op=Add(), right=Num(n=1, lineno=4, col_offset=4), lineno=4, '
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diff changeset
242 'col_offset=0))'
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diff changeset
243 )
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244
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diff changeset
245 def test_iter_fields(self):
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246 node = ast.parse('foo()', mode='eval')
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247 d = dict(ast.iter_fields(node.body))
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248 self.assertEqual(d.pop('func').id, 'foo')
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249 self.assertEqual(d, {'keywords': [], 'kwargs': None,
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diff changeset
250 'args': [], 'starargs': None})
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251
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diff changeset
252 def test_iter_child_nodes(self):
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diff changeset
253 node = ast.parse("spam(23, 42, eggs='leek')", mode='eval')
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diff changeset
254 self.assertEqual(len(list(ast.iter_child_nodes(node.body))), 4)
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diff changeset
255 iterator = ast.iter_child_nodes(node.body)
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diff changeset
256 self.assertEqual(next(iterator).id, 'spam')
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diff changeset
257 self.assertEqual(next(iterator).n, 23)
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diff changeset
258 self.assertEqual(next(iterator).n, 42)
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diff changeset
259 self.assertEqual(ast.dump(next(iterator)),
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diff changeset
260 "keyword(arg='eggs', value=Str(s='leek'))"
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261 )
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diff changeset
262
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diff changeset
263 def test_get_docstring(self):
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diff changeset
264 node = ast.parse('def foo():\n """line one\n line two"""')
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diff changeset
265 self.assertEqual(ast.get_docstring(node.body[0]),
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diff changeset
266 'line one\nline two')
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diff changeset
267
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diff changeset
268 def test_literal_eval(self):
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diff changeset
269 self.assertEqual(ast.literal_eval('[1, 2, 3]'), [1, 2, 3])
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diff changeset
270 self.assertEqual(ast.literal_eval('{"foo": 42}'), {"foo": 42})
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271 self.assertEqual(ast.literal_eval('(True, False, None)'), (True, False, None))
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272 self.assertRaises(ValueError, ast.literal_eval, 'foo()')
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273
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274 def test_literal_eval_issue4907(self):
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275 self.assertEqual(ast.literal_eval('2j'), 2j)
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276 self.assertEqual(ast.literal_eval('10 + 2j'), 10 + 2j)
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277 self.assertEqual(ast.literal_eval('1.5 - 2j'), 1.5 - 2j)
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278 self.assertRaises(ValueError, ast.literal_eval, '2 + (3 + 4j)')
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279
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280
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281 def test_main():
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282 test_support.run_unittest(AST_Tests, ASTHelpers_Test)
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283
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284 def main():
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285 if __name__ != '__main__':
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286 return
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287 if sys.argv[1:] == ['-g']:
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288 for statements, kind in ((exec_tests, "exec"), (single_tests, "single"),
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289 (eval_tests, "eval")):
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290 print kind+"_results = ["
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291 for s in statements:
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292 print repr(to_tuple(compile(s, "?", kind, 0x400)))+","
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293 print "]"
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294 print "main()"
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295 raise SystemExit
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296 test_main()
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297
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298 #### EVERYTHING BELOW IS GENERATED #####
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299 exec_results = [
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300 ('Module', [('FunctionDef', (1, 0), 'f', ('arguments', [], None, None, []), [('Pass', (1, 9))], [])]),
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393822f2ef90 Patch #1759: Backport of PEP 3129 class decorators
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301 ('Module', [('ClassDef', (1, 0), 'C', [], [('Pass', (1, 8))], [])]),
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302 ('Module', [('FunctionDef', (1, 0), 'f', ('arguments', [], None, None, []), [('Return', (1, 8), ('Num', (1, 15), 1))], [])]),
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303 ('Module', [('Delete', (1, 0), [('Name', (1, 4), 'v', ('Del',))])]),
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parents: 36723
diff changeset
304 ('Module', [('Assign', (1, 0), [('Name', (1, 0), 'v', ('Store',))], ('Num', (1, 4), 1))]),
39037
9f70f6ba7b69 Fix AST compiler bug #1501934: incorrect LOAD/STORE_GLOBAL generation.
Neil Schemenauer <nascheme@enme.ucalgary.ca>
parents: 37466
diff changeset
305 ('Module', [('AugAssign', (1, 0), ('Name', (1, 0), 'v', ('Store',)), ('Add',), ('Num', (1, 5), 1))]),
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306 ('Module', [('Print', (1, 0), ('Name', (1, 8), 'f', ('Load',)), [('Num', (1, 11), 1)], False)]),
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307 ('Module', [('For', (1, 0), ('Name', (1, 4), 'v', ('Store',)), ('Name', (1, 9), 'v', ('Load',)), [('Pass', (1, 11))], [])]),
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diff changeset
308 ('Module', [('While', (1, 0), ('Name', (1, 6), 'v', ('Load',)), [('Pass', (1, 8))], [])]),
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Martin v. Löwis <martin@v.loewis.de>
parents: 36723
diff changeset
309 ('Module', [('If', (1, 0), ('Name', (1, 3), 'v', ('Load',)), [('Pass', (1, 5))], [])]),
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parents: 36723
diff changeset
310 ('Module', [('Raise', (1, 0), ('Name', (1, 6), 'Exception', ('Load',)), ('Str', (1, 17), 'string'), None)]),
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parents: 46197
diff changeset
311 ('Module', [('TryExcept', (1, 0), [('Pass', (2, 2))], [('ExceptHandler', (3, 0), ('Name', (3, 7), 'Exception', ('Load',)), None, [('Pass', (4, 2))])], [])]),
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diff changeset
312 ('Module', [('TryFinally', (1, 0), [('Pass', (2, 2))], [('Pass', (4, 2))])]),
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parents: 36723
diff changeset
313 ('Module', [('Assert', (1, 0), ('Name', (1, 7), 'v', ('Load',)), None)]),
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parents: 36723
diff changeset
314 ('Module', [('Import', (1, 0), [('alias', 'sys', None)])]),
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Martin v. Löwis <martin@v.loewis.de>
parents: 36723
diff changeset
315 ('Module', [('ImportFrom', (1, 0), 'sys', [('alias', 'v', None)], 0)]),
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parents: 36723
diff changeset
316 ('Module', [('Exec', (1, 0), ('Str', (1, 5), 'v'), None, None)]),
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parents: 36723
diff changeset
317 ('Module', [('Global', (1, 0), ['v'])]),
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parents: 36723
diff changeset
318 ('Module', [('Expr', (1, 0), ('Num', (1, 0), 1))]),
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parents: 36723
diff changeset
319 ('Module', [('Pass', (1, 0))]),
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parents: 36723
diff changeset
320 ('Module', [('Break', (1, 0))]),
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parents: 36723
diff changeset
321 ('Module', [('Continue', (1, 0))]),
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322 ]
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diff changeset
323 single_results = [
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diff changeset
324 ('Interactive', [('Expr', (1, 0), ('BinOp', (1, 0), ('Num', (1, 0), 1), ('Add',), ('Num', (1, 2), 2)))]),
36723
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325 ]
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diff changeset
326 eval_results = [
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diff changeset
327 ('Expression', ('BoolOp', (1, 0), ('And',), [('Name', (1, 0), 'a', ('Load',)), ('Name', (1, 6), 'b', ('Load',))])),
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parents: 36723
diff changeset
328 ('Expression', ('BinOp', (1, 0), ('Name', (1, 0), 'a', ('Load',)), ('Add',), ('Name', (1, 4), 'b', ('Load',)))),
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parents: 36723
diff changeset
329 ('Expression', ('UnaryOp', (1, 0), ('Not',), ('Name', (1, 4), 'v', ('Load',)))),
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parents: 36723
diff changeset
330 ('Expression', ('Lambda', (1, 0), ('arguments', [], None, None, []), ('Name', (1, 7), 'None', ('Load',)))),
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parents: 36723
diff changeset
331 ('Expression', ('Dict', (1, 0), [('Num', (1, 2), 1)], [('Num', (1, 4), 2)])),
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parents: 36723
diff changeset
332 ('Expression', ('ListComp', (1, 1), ('Name', (1, 1), 'a', ('Load',)), [('comprehension', ('Name', (1, 7), 'b', ('Store',)), ('Name', (1, 12), 'c', ('Load',)), [('Name', (1, 17), 'd', ('Load',))])])),
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parents: 36723
diff changeset
333 ('Expression', ('GeneratorExp', (1, 1), ('Name', (1, 1), 'a', ('Load',)), [('comprehension', ('Name', (1, 7), 'b', ('Store',)), ('Name', (1, 12), 'c', ('Load',)), [('Name', (1, 17), 'd', ('Load',))])])),
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parents: 36723
diff changeset
334 ('Expression', ('Compare', (1, 0), ('Num', (1, 0), 1), [('Lt',), ('Lt',)], [('Num', (1, 4), 2), ('Num', (1, 8), 3)])),
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parents: 36723
diff changeset
335 ('Expression', ('Call', (1, 0), ('Name', (1, 0), 'f', ('Load',)), [('Num', (1, 2), 1), ('Num', (1, 4), 2)], [('keyword', 'c', ('Num', (1, 8), 3))], ('Name', (1, 11), 'd', ('Load',)), ('Name', (1, 15), 'e', ('Load',)))),
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Martin v. Löwis <martin@v.loewis.de>
parents: 36723
diff changeset
336 ('Expression', ('Repr', (1, 0), ('Name', (1, 1), 'v', ('Load',)))),
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parents: 36723
diff changeset
337 ('Expression', ('Num', (1, 0), 10L)),
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parents: 36723
diff changeset
338 ('Expression', ('Str', (1, 0), 'string')),
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Martin v. Löwis <martin@v.loewis.de>
parents: 36723
diff changeset
339 ('Expression', ('Attribute', (1, 0), ('Name', (1, 0), 'a', ('Load',)), 'b', ('Load',))),
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Martin v. Löwis <martin@v.loewis.de>
parents: 36723
diff changeset
340 ('Expression', ('Subscript', (1, 0), ('Name', (1, 0), 'a', ('Load',)), ('Slice', ('Name', (1, 2), 'b', ('Load',)), ('Name', (1, 4), 'c', ('Load',)), None), ('Load',))),
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Martin v. Löwis <martin@v.loewis.de>
parents: 36723
diff changeset
341 ('Expression', ('Name', (1, 0), 'v', ('Load',))),
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Martin v. Löwis <martin@v.loewis.de>
parents: 36723
diff changeset
342 ('Expression', ('List', (1, 0), [('Num', (1, 1), 1), ('Num', (1, 3), 2), ('Num', (1, 5), 3)], ('Load',))),
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Martin v. Löwis <martin@v.loewis.de>
parents: 36723
diff changeset
343 ('Expression', ('Tuple', (1, 0), [('Num', (1, 0), 1), ('Num', (1, 2), 2), ('Num', (1, 4), 3)], ('Load',))),
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parents: 36723
diff changeset
344 ('Expression', ('Call', (1, 0), ('Attribute', (1, 0), ('Attribute', (1, 0), ('Attribute', (1, 0), ('Name', (1, 0), 'a', ('Load',)), 'b', ('Load',)), 'c', ('Load',)), 'd', ('Load',)), [('Subscript', (1, 8), ('Attribute', (1, 8), ('Name', (1, 8), 'a', ('Load',)), 'b', ('Load',)), ('Slice', ('Num', (1, 12), 1), ('Num', (1, 14), 2), None), ('Load',))], [], None, None)),
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345 ]
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diff changeset
346 main()