Mercurial > pytave
annotate pyeval.cc @ 372:b20b8cf8ad07
Make an internal function to return the name of the builtins module
* oct-py-util.cc (pytave::py_builtins_module_name): New function.
(pytave::py_builtins_module): Use it.
author | Mike Miller <mtmiller@octave.org> |
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date | Fri, 26 Aug 2016 13:59:18 -0700 |
parents | 087e7bc3697f |
children | 3644df6564bc |
rev | line source |
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161 | 1 /* |
2 | |
3 Copyright (C) 2016 Colin B. Macdonald | |
4 | |
5 This file is part of Pytave. | |
6 | |
7 Pytave is free software; you can redistribute it and/or modify it | |
8 under the terms of the GNU General Public License as published by the | |
9 Free Software Foundation; either version 3 of the License, or (at your | |
10 option) any later version. | |
11 | |
12 Pytave is distributed in the hope that it will be useful, but WITHOUT | |
13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
15 for more details. | |
16 | |
17 You should have received a copy of the GNU General Public License | |
18 along with Pytave; see the file COPYING. If not, see | |
19 <http://www.gnu.org/licenses/>. | |
20 | |
21 */ | |
22 | |
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23 #if defined (HAVE_CONFIG_H) |
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24 # include <config.h> |
161 | 25 #endif |
26 | |
27 #include <dlfcn.h> | |
28 #include <boost/python.hpp> | |
29 #include <boost/python/numeric.hpp> | |
30 | |
31 #include <oct.h> | |
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32 #include <octave/parse.h> |
161 | 33 |
34 #define PYTAVE_DO_DECLARE_SYMBOL | |
35 #include "arrayobjectdefs.h" | |
36 #include "exceptions.h" | |
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37 #include "oct-py-eval.h" |
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38 #include "oct-py-util.h" |
161 | 39 #include "python_to_octave.h" |
40 | |
41 using namespace boost::python; | |
42 | |
43 DEFUN_DLD (pyeval, args, nargout, | |
44 "-*- texinfo -*-\n\ | |
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45 @deftypefn {} {} pyeval (@var{expr})\n\ |
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46 @deftypefnx {} {} pyeval (@var{expr}, @var{localns})\n\ |
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47 @deftypefnx {} {@var{x} =} pyeval (@dots{})\n\ |
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48 Evaluate a Python expression and return the result.\n\ |
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49 \n\ |
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50 When called with an optional second argument, @var{localns} is a\n\ |
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51 @code{py.dict} that acts as the namespace for any assignments or other\n\ |
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52 side effects of the expression.\n\ |
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53 \n\ |
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54 Examples:\n\ |
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55 @example\n\ |
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56 @group\n\ |
176 | 57 pyexec (\"import sys\")\n\ |
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58 pyeval (\"sys.version\")\n\ |
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59 @result{} ...\n\ |
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60 pyeval (\"dict(two=2)\")\n\ |
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61 @result{} [pyobject ...]\n\ |
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62 @{'two': 2@}\n\ |
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63 @end group\n\ |
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64 @end example\n\ |
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65 @seealso{pycall, pyexec}\n\ |
161 | 66 @end deftypefn") |
67 { | |
68 octave_value_list retval; | |
69 | |
70 int nargin = args.length (); | |
71 | |
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72 if (nargin < 1 || nargin > 2) |
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73 { |
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74 print_usage (); |
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75 return retval; |
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76 } |
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77 |
161 | 78 std::string code = args(0).string_value (); |
79 | |
80 Py_Initialize (); | |
81 | |
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82 PyObject *local_namespace = 0; |
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83 if (nargin > 1) |
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84 { |
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85 local_namespace = pytave::pyobject_unwrap_object (args(1)); |
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86 if (! local_namespace) |
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87 error ("pyeval: NAMESPACE must be a valid Python reference"); |
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88 } |
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89 |
161 | 90 try |
91 { | |
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92 PyObject *obj = pytave::py_eval_string (code, 0, local_namespace); |
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93 boost::python::object res { boost::python::handle<> (obj) }; |
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94 |
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95 if (nargout > 0 || ! res.is_none ()) |
161 | 96 { |
97 octave_value val; | |
98 pytave::pyobj_to_octvalue (val, res); | |
99 retval(0) = val; | |
100 } | |
101 } | |
102 catch (pytave::object_convert_exception const &) | |
103 { | |
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104 error ("pyexec: error in return value type conversion"); |
161 | 105 } |
106 catch (error_already_set const &) | |
107 { | |
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108 std::string message = pytave::fetch_exception_message (); |
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109 error ("pyeval: %s", message.c_str ()); |
161 | 110 } |
111 | |
112 return retval; | |
113 } | |
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114 |
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115 /* |
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116 %!assert (isnumeric (double (pyeval ("0")))) |
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117 %!assert (isreal (double (pyeval ("0")))) |
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118 %!assert (double (pyeval ("0")), 0) |
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119 |
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120 %!assert (isnumeric (pyeval ("10.1"))) |
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121 %!assert (isreal (pyeval ("10.1"))) |
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122 %!assert (pyeval ("10.1"), 10.1) |
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123 |
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124 %!assert (isnumeric (pyeval ("2j"))) |
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125 %!assert (iscomplex (pyeval ("2j"))) |
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126 %!assert (pyeval ("2j"), 2j) |
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127 |
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128 %!assert (ischar (char (pyeval ("\"I <3 Octave\"")))) |
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129 %!assert (char (pyeval ("\"I <3 Octave\"")), "I <3 Octave") |
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130 |
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131 %!assert (islogical (pyeval ("True"))) |
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132 %!assert (islogical (pyeval ("False"))) |
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133 %!assert (pyeval ("True"), true) |
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134 %!assert (pyeval ("False"), false) |
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135 %!assert (class (pyeval ("True")), "logical") |
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136 %!assert (class (pyeval ("False")), "logical") |
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137 |
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138 %!assert (isa (pyeval ("object()"), "pyobject")) |
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139 |
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140 %!assert (isnumeric (double (pyeval ("__import__('sys').maxsize")))) |
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141 %!assert (double (pyeval ("99999999999999")), 99999999999999) |
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142 %!assert (double (pyeval ("-99999999999999")), -99999999999999) |
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143 |
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144 %!test |
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145 %! z = pyeval ("{'x': 1., 'y': 2.}"); |
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146 %! assert (isa (z, "pyobject")) |
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147 %! assert (z{"x"}, 1) |
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148 |
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149 %!test |
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150 %! z = pyeval ("[1., 2., 3.]"); |
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151 %! assert (isa (z, "pyobject")) |
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152 %! assert ({z{1}, z{2}, z{3}}, {1, 2, 3}) |
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153 |
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154 %!test |
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155 %! z = pyeval ("(4., 5., 6.)"); |
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156 %! assert (isa (z, "pyobject")) |
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157 %! assert ({z{1}, z{2}, z{3}}, {4, 5, 6}) |
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158 |
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159 %!test |
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160 %! z = pyeval ("[1., [21., 22.], 3., [41., [421., 422.], 43.]]"); |
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161 %! assert (isa (z, "pyobject")) |
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162 %! assert (isa (z{2}, "pyobject")) |
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163 %! assert (z{2}{1}, 21) |
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164 %! assert (z{2}{2}, 22) |
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165 %! assert (isa (z{4}{2}, "pyobject")) |
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166 %! assert (z{4}{2}{1}, 421) |
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167 %! assert (z{4}{2}{2}, 422) |
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168 |
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169 %!error <NameError> |
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170 %! pyexec ("def raiseException(): raise NameError ('oops')") |
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171 %! pyeval ("raiseException()") |
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172 |
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173 %!test |
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174 %! % Variable defined in global namespace is available locally |
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175 %! myNS = pyeval ("{}"); |
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176 %! pyexec ("myvar = 1.") |
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177 %! assert (pyeval ("myvar", myNS), 1); |
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178 |
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179 %!test |
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180 %! % Variables with same name can have different values in different namespaces |
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181 %! myNS1 = pyeval ("{}"); |
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182 %! myNS2 = pyeval ("{}"); |
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183 %! pyexec ("myvar = 1.") |
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184 %! pyexec ("myvar = 2.", myNS1) |
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185 %! pyexec ("myvar = 3.", myNS2) |
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186 %! assert (pyeval ("myvar"), 1) |
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187 %! assert (pyeval ("myvar", myNS1), 2) |
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188 %! assert (pyeval ("myvar", myNS2), 3) |
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189 |
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190 %!error <NameError> |
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191 %! pyexec ("if 'myvar' in globals(): del myvar") |
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192 %! % Variable defined in local namespace MUST not be available globally |
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193 %! myNS = pyeval ("{}"); |
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194 %! pyexec ("myvar = 1.", myNS) |
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195 %! pyeval ("myvar"); |
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196 |
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197 %!error <NameError> |
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198 %! pyexec ("if 'myvar' in globals(): del myvar") |
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199 %! % Variable defined in one local namespace MUST not be available in another |
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200 %! myNS1 = pyeval ("{}"); |
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201 %! myNS2 = pyeval ("{}"); |
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202 %! pyexec ("myvar = 1.", myNS1) |
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203 %! pyeval ("myvar", myNS2); |
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204 |
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205 %!error <NameError> |
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206 %! pyexec ("if 'sys' in globals(): del sys") |
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207 %! % Modules imported in local namespace MUST not be accessible globally |
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208 %! myNS = pyeval ("{}"); |
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209 %! pyexec ("import sys", myNS); |
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210 %! pyeval ("sys"); |
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211 */ |