Feature/switch program#5932
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reyoung merged 13 commits intoPaddlePaddle:developfrom Nov 30, 2017
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Change books just use `import fluid`, not submodules
Use default_main_program/default_startup_program instead
* Two functions: switch_main_program/switch_startup_program * A guard: program_guard. Users can use the `with` statement change default programs * Change unittests in `test_layers`
QiJune
reviewed
Nov 29, 2017
| global _main_program_ | ||
| prev_program = _main_program_ | ||
| _main_program_ = program | ||
| return prev_program |
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Here, why return prev_program, not _main_program_? We are switch to a new program, not previous one
QiJune
reviewed
Nov 29, 2017
| Get default main program. The main program is used for training or testing. | ||
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| Returns: | ||
| Program: main program |
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Why we need this default_main_program() function, not use _main_program_ directly?
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Second step of #5929.
Fix #5929.
Please review #5930 first.