Plugins/CheckerPlugins/SyntaxChecker/SyntaxCheck.py

Sun, 30 Mar 2014 22:00:14 +0200

author
T.Rzepka <Tobias.Rzepka@gmail.com>
date
Sun, 30 Mar 2014 22:00:14 +0200
branch
Py2 comp.
changeset 3456
96232974dcdb
parent 3161
Utilities/SyntaxCheck.py@06f57a834adf
parent 3412
Utilities/SyntaxCheck.py@9364dab2d472
child 3515
1b8381afe38f
permissions
-rw-r--r--

Merge with BgService.

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1 # -*- coding: utf-8 -*-
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2
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3 # Copyright (c) 2011 - 2014 Detlev Offenbach <detlev@die-offenbachs.de>
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4 #
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5 # pylint: disable=C0103
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7 """
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8 Module implementing the syntax check for Python 2/3.
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9 """
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10 import re
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11 import sys
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12 import traceback
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13
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14 try:
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15 from pyflakes.checker import Checker
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16 from pyflakes.messages import ImportStarUsed
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17 except ImportError:
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18 pass
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20
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21 def initService():
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22 """
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23 Initialize the service and return the entry point.
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24
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25 @return the entry point for the background client (function)
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26 """
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27 return syntaxAndPyflakesCheck
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29
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30 def normalizeCode(codestring):
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31 """
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32 Function to normalize the given code.
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33
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34 @param codestring code to be normalized (string)
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35 @return normalized code (string)
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36 """
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37 codestring = codestring.replace("\r\n", "\n").replace("\r", "\n")
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38
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39 if codestring and codestring[-1] != '\n':
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40 codestring = codestring + '\n'
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41
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42 # Check type for py2: if not str it's unicode
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43 if sys.version_info[0] == 2:
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44 try:
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45 codestring = codestring.encode('utf-8')
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46 except UnicodeError:
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47 pass
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49 return codestring
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51
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52 def extractLineFlags(line, startComment="#", endComment=""):
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53 """
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54 Function to extract flags starting and ending with '__' from a line
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55 comment.
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57 @param line line to extract flags from (string)
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58 @keyparam startComment string identifying the start of the comment (string)
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59 @keyparam endComment string identifying the end of a comment (string)
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60 @return list containing the extracted flags (list of strings)
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61 """
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62 flags = []
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63
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64 pos = line.rfind(startComment)
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65 if pos >= 0:
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66 comment = line[pos + len(startComment):].strip()
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67 if endComment:
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68 comment = comment.replace("endComment", "")
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69 flags = [f.strip() for f in comment.split()
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70 if (f.startswith("__") and f.endswith("__"))]
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71 return flags
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73
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74 def syntaxAndPyflakesCheck(filename, codestring, checkFlakes=True,
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75 ignoreStarImportWarnings=False):
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76 """
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77 Function to compile one Python source file to Python bytecode
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78 and to perform a pyflakes check.
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79
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80 @param filename source filename (string)
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81 @param codestring string containing the code to compile (string)
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82 @keyparam checkFlakes flag indicating to do a pyflakes check (boolean)
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83 @keyparam ignoreStarImportWarnings flag indicating to
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84 ignore 'star import' warnings (boolean)
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85 @return dictionary with the keys 'error' and 'warnings' which
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86 hold a list containing details about the error/ warnings
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87 (file name, line number, column, codestring (only at syntax
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88 errors), the message, a list with arguments for the message)
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89 """
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90 try:
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91 import builtins
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92 except ImportError:
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93 import __builtin__ as builtins #__IGNORE_WARNING__
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94
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95 try:
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96 if sys.version_info[0] == 2:
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97 file_enc = filename.encode(sys.getfilesystemencoding())
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98 else:
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99 file_enc = filename
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100
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101 # It also encode the code back to avoid 'Encoding declaration in
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102 # unicode string' exception on Python2
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103 codestring = normalizeCode(codestring)
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104
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105 if filename.endswith('.ptl'):
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106 try:
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107 import quixote.ptl_compile
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108 except ImportError:
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109 return [{'error': (filename, 0, 0, '',
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110 'Quixote plugin not found.')}]
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111 template = quixote.ptl_compile.Template(codestring, file_enc)
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112 template.compile()
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113 else:
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114 # ast.PyCF_ONLY_AST = 1024, speed optimisation
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115 module = builtins.compile(codestring, file_enc, 'exec', 1024)
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116 except SyntaxError as detail:
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117 index = 0
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118 code = ""
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119 error = ""
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120 lines = traceback.format_exception_only(SyntaxError, detail)
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121 if sys.version_info[0] == 2:
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122 lines = [x.decode(sys.getfilesystemencoding()) for x in lines]
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123 match = re.match('\s*File "(.+)", line (\d+)',
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124 lines[0].replace('<string>', '{0}'.format(filename)))
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125 if match is not None:
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126 fn, line = match.group(1, 2)
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127 if lines[1].startswith('SyntaxError:'):
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128 error = re.match('SyntaxError: (.+)', lines[1]).group(1)
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129 else:
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130 code = re.match('(.+)', lines[1]).group(1)
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131 for seLine in lines[2:]:
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132 if seLine.startswith('SyntaxError:'):
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133 error = re.match('SyntaxError: (.+)', seLine).group(1)
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134 elif seLine.rstrip().endswith('^'):
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135 index = len(seLine.rstrip()) - 4
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136 else:
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137 fn = detail.filename
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138 line = detail.lineno or 1
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diff changeset
139 error = detail.msg
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140 return [{'error': (fn, int(line), index, code.strip(), error)}]
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141 except ValueError as detail:
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142 try:
e6bb19eb87ea Fixes for autocodecheck with pyflakes and update of py2flakes to 0.6.1.
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diff changeset
143 fn = detail.filename
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144 line = detail.lineno
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diff changeset
145 error = detail.msg
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diff changeset
146 except AttributeError:
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diff changeset
147 fn = filename
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148 line = 1
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diff changeset
149 error = str(detail)
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150 return [{'error': (fn, line, 0, "", error)}]
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151 except Exception as detail:
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diff changeset
152 try:
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diff changeset
153 fn = detail.filename
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diff changeset
154 line = detail.lineno
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diff changeset
155 error = detail.msg
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156 return [{'error': (fn, line, 0, "", error)}]
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157 except: # this catchall is intentional
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diff changeset
158 pass
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parents:
diff changeset
159
e6bb19eb87ea Fixes for autocodecheck with pyflakes and update of py2flakes to 0.6.1.
T.Rzepka <Tobias.Rzepka@gmail.com>
parents:
diff changeset
160 # pyflakes
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diff changeset
161 if not checkFlakes:
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diff changeset
162 return [{}]
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diff changeset
163
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diff changeset
164 results = []
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165 lines = codestring.splitlines()
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diff changeset
166 try:
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diff changeset
167 warnings = Checker(module, filename)
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diff changeset
168 warnings.messages.sort(key=lambda a: a.lineno)
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diff changeset
169 for warning in warnings.messages:
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diff changeset
170 if ignoreStarImportWarnings and \
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070b35dde35e Fixed a bunch of indentation issues.
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diff changeset
171 isinstance(warning, ImportStarUsed):
070b35dde35e Fixed a bunch of indentation issues.
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diff changeset
172 continue
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parents:
diff changeset
173
3177
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diff changeset
174 _fn, lineno, col, message, msg_args = warning.getMessageData()
3065
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diff changeset
175 if "__IGNORE_WARNING__" not in extractLineFlags(
070b35dde35e Fixed a bunch of indentation issues.
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diff changeset
176 lines[lineno - 1].strip()):
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diff changeset
177 results.append((_fn, lineno, col, "", message, msg_args))
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diff changeset
178 except SyntaxError as err:
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diff changeset
179 if err.text.strip():
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diff changeset
180 msg = err.text.strip()
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diff changeset
181 else:
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diff changeset
182 msg = err.msg
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diff changeset
183 results.append((filename, err.lineno, 0, "FLAKES_ERROR", msg, []))
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diff changeset
184
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diff changeset
185 return [{'warnings': results}]

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