[ 
https://issues.apache.org/jira/browse/ARROW-8904?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

ASF GitHub Bot updated ARROW-8904:
----------------------------------
    Labels: pull-request-available  (was: )

> [Python] Fix usages of deprecated C++ APIs related to child/field
> -----------------------------------------------------------------
>
>                 Key: ARROW-8904
>                 URL: https://issues.apache.org/jira/browse/ARROW-8904
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: Python
>            Reporter: Wes McKinney
>            Assignee: Wes McKinney
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 1.0.0
>
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> {code}
> -- Running cmake --build for pyarrow
> cmake --build . --config debug -- -j16
> [19/20] Building CXX object CMakeFiles/lib.dir/lib.cpp.o
> lib.cpp:20265:85: warning: 'num_children' is deprecated: Use num_fields() 
> [-Wdeprecated-declarations]
>   __pyx_t_1 = __pyx_f_7pyarrow_3lib__normalize_index(__pyx_v_i, 
> __pyx_v_self->type->num_children()); if (unlikely(__pyx_t_1 == 
> ((Py_ssize_t)-1L))) __PYX_ERR(1, 119, __pyx_L1_error)
>                                                                               
>       ^
> /home/wesm/local/include/arrow/type.h:263:3: note: 'num_children' has been 
> explicitly marked deprecated here
>   ARROW_DEPRECATED("Use num_fields()")
>   ^
> /home/wesm/local/include/arrow/util/macros.h:104:48: note: expanded from 
> macro 'ARROW_DEPRECATED'
> #  define ARROW_DEPRECATED(...) __attribute__((deprecated(__VA_ARGS__)))
>                                                ^
> lib.cpp:20276:76: warning: 'child' is deprecated: Use field(i) 
> [-Wdeprecated-declarations]
>   __pyx_t_2 = 
> __pyx_f_7pyarrow_3lib_pyarrow_wrap_field(__pyx_v_self->type->child(__pyx_v_index));
>  if (unlikely(!__pyx_t_2)) __PYX_ERR(1, 120, __pyx_L1_error)
>                                                                            ^
> /home/wesm/local/include/arrow/type.h:251:3: note: 'child' has been 
> explicitly marked deprecated here
>   ARROW_DEPRECATED("Use field(i)")
>   ^
> /home/wesm/local/include/arrow/util/macros.h:104:48: note: expanded from 
> macro 'ARROW_DEPRECATED'
> #  define ARROW_DEPRECATED(...) __attribute__((deprecated(__VA_ARGS__)))
>                                                ^
> lib.cpp:20507:56: warning: 'num_children' is deprecated: Use num_fields() 
> [-Wdeprecated-declarations]
>   __pyx_t_1 = __Pyx_PyInt_From_int(__pyx_v_self->type->num_children()); if 
> (unlikely(!__pyx_t_1)) __PYX_ERR(1, 139, __pyx_L1_error)
>                                                        ^
> /home/wesm/local/include/arrow/type.h:263:3: note: 'num_children' has been 
> explicitly marked deprecated here
>   ARROW_DEPRECATED("Use num_fields()")
>   ^
> /home/wesm/local/include/arrow/util/macros.h:104:48: note: expanded from 
> macro 'ARROW_DEPRECATED'
> #  define ARROW_DEPRECATED(...) __attribute__((deprecated(__VA_ARGS__)))
>                                                ^
> lib.cpp:23361:44: warning: 'num_children' is deprecated: Use num_fields() 
> [-Wdeprecated-declarations]
>   __pyx_r = __pyx_v_self->__pyx_base.type->num_children();
>                                            ^
> /home/wesm/local/include/arrow/type.h:263:3: note: 'num_children' has been 
> explicitly marked deprecated here
>   ARROW_DEPRECATED("Use num_fields()")
>   ^
> /home/wesm/local/include/arrow/util/macros.h:104:48: note: expanded from 
> macro 'ARROW_DEPRECATED'
> #  define ARROW_DEPRECATED(...) __attribute__((deprecated(__VA_ARGS__)))
>                                                ^
> lib.cpp:24039:44: warning: 'num_children' is deprecated: Use num_fields() 
> [-Wdeprecated-declarations]
>   __pyx_r = __pyx_v_self->__pyx_base.type->num_children();
>                                            ^
> /home/wesm/local/include/arrow/type.h:263:3: note: 'num_children' has been 
> explicitly marked deprecated here
>   ARROW_DEPRECATED("Use num_fields()")
>   ^
> /home/wesm/local/include/arrow/util/macros.h:104:48: note: expanded from 
> macro 'ARROW_DEPRECATED'
> #  define ARROW_DEPRECATED(...) __attribute__((deprecated(__VA_ARGS__)))
>                                                ^
> lib.cpp:58220:37: warning: 'child' is deprecated: Use field(pos) 
> [-Wdeprecated-declarations]
>   __pyx_v_child = __pyx_v_self->ap->child(__pyx_v_child_id);
>                                     ^
> /home/wesm/local/include/arrow/array.h:1281:3: note: 'child' has been 
> explicitly marked deprecated here
>   ARROW_DEPRECATED("Use field(pos)")
>   ^
> /home/wesm/local/include/arrow/util/macros.h:104:48: note: expanded from 
> macro 'ARROW_DEPRECATED'
> #  define ARROW_DEPRECATED(...) __attribute__((deprecated(__VA_ARGS__)))
>                                                ^
> lib.cpp:58956:74: warning: 'children' is deprecated: Use fields() 
> [-Wdeprecated-declarations]
>   __pyx_v_child_fields = 
> __pyx_v_self->__pyx_base.__pyx_base.type->type->children();
>                                                                          ^
> /home/wesm/local/include/arrow/type.h:257:3: note: 'children' has been 
> explicitly marked deprecated here
>   ARROW_DEPRECATED("Use fields()")
>   ^
> /home/wesm/local/include/arrow/util/macros.h:104:48: note: expanded from 
> macro 'ARROW_DEPRECATED'
> #  define ARROW_DEPRECATED(...) __attribute__((deprecated(__VA_ARGS__)))
>                                                ^
> lib.cpp:78247:73: warning: 'child' is deprecated: Use field(pos) 
> [-Wdeprecated-declarations]
>   __pyx_v_result = (( arrow::UnionArray 
> *)__pyx_v_self->__pyx_base.ap)->child(__pyx_v_pos);
>                                                                         ^
> /home/wesm/local/include/arrow/array.h:1281:3: note: 'child' has been 
> explicitly marked deprecated here
>   ARROW_DEPRECATED("Use field(pos)")
>   ^
> /home/wesm/local/include/arrow/util/macros.h:104:48: note: expanded from 
> macro 'ARROW_DEPRECATED'
> #  define ARROW_DEPRECATED(...) __attribute__((deprecated(__VA_ARGS__)))
>                                                ^
> 8 warnings generated.
> {code}



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