U
    >vf~3                     @   sb   d dl Zd dlZd dlmZmZmZ d dlmZ	 d dl
m  mZ G dd dZG dd dZdS )    N)	DataFrameIndexSeriesc                   @   s   e Zd Zejdd Zejdee	ddd Z
dd Zd	d
 Zdd Zdd Zdd Zdd Zdd Zdd Zdd Zdd Zdd Zejdddd d!d"gfd#d$gd%d& Zd'd( Zd)d* Zd+S ),
TestSamplec                 C   s0   |t krtjd}ntjdd}||d dS )N
   )Zdtype)r   nprandomrandn)selfframe_or_seriesZarr r   J/tmp/pip-unpacked-wheel-vdrwu74i/pandas/tests/frame/methods/test_sample.pyobj   s    zTestSample.objtestr   c              	   C   sB  t jdd}t|jd|d|jd|d t|jd|d|jd|d t|jdt j|d|jdt j|d t|jdt j|d|jdt j|d t|jddt j|d	|jddt j|d	 g g  }}tdD ]4}t j| |	|jdd
 |	|jdd qtj|  tj|  d S )Nr   d      nrandom_stategffffff?)fracr      T)r   replacer   r   r   )
r   r   randinttmassert_equalsampleZRandomStaterangeseedappend)r
   r   r   r   Zos1Zos2_r   r   r   test_sample   s8     

zTestSample.test_samplec                 C   sL   t |jdddkstt |jdddks0tt |jdddksHtd S )Nr   r   g(\?r      g
ףp=
?)lenr   AssertionErrorr
   r   r   r   r   test_sample_lengths>   s    zTestSample.test_sample_lengthsc              	   C   s.   d}t jt|d |jdd W 5 Q R X d S )Nzdrandom_state must be an integer, array-like, a BitGenerator, Generator, a numpy RandomState, or NonematchZa_string)r   pytestraises
ValueErrorr   r
   r   msgr   r   r    test_sample_invalid_random_stateD   s    z+TestSample.test_sample_invalid_random_statec              	   C   s0   d}t jt|d |jddd W 5 Q R X d S )Nz0Please enter a value for `frac` OR `n`, not bothr(   r#   g333333?)r   r   r*   r.   r   r   r   "test_sample_wont_accept_n_and_fracM   s    z-TestSample.test_sample_wont_accept_n_and_fracc              	   C   sP   t jtdd |jdd W 5 Q R X t jtdd |jdd W 5 Q R X d S )Nz<A negative number of rows requested. Please provide `n` >= 0r(   r   z?A negative number of rows requested. Please provide `frac` >= 0g333333ӿr   r*   r&   r   r   r   $test_sample_requires_positive_n_fracS   s    z/TestSample.test_sample_requires_positive_n_fracc              	   C   s*   t jtdd |jdd W 5 Q R X d S )Nz$Only integers accepted as `n` valuesr(   g	@r   r*   r&   r   r   r   test_sample_requires_integer_n_   s    z)TestSample.test_sample_requires_integer_nc              	   C   s   d}t jt|d |jdddgd W 5 Q R X t jt|d dgd }|jd|d W 5 Q R X t jtd	d" tddd
g}|jd|d W 5 Q R X d S )N5Weights and axis to be sampled must be of same lengthr(   r#   r      r   weights      ?   z%Fewer non-zero entries in p than sizeg?r   )r+   r,   r-   r   r   )r
   r   r/   bad_weightsZbad_weight_seriesr   r   r   "test_sample_invalid_weight_lengthsd   s    
z-TestSample.test_sample_invalid_weight_lengthsc              	   C   s:   dgd }d}t jt|d |jd|d W 5 Q R X d S )Ngr   z.weight vector many not include negative valuesr(   r#   r7   r*   )r
   r   r;   r/   r   r   r   test_sample_negative_weightsr   s    
z'TestSample.test_sample_negative_weightsc              	   C   s   dgd }t j|d< d}tjt|d |jd|d W 5 Q R X dgd }t j |d< tjt|d |jd|d W 5 Q R X d S )Ng?r   r   z*weight vector may not include `inf` valuesr(   r#   r7   )r   infr+   r,   r-   r   )r
   r   Zweights_with_infr/   Zweights_with_ninfr   r   r   test_sample_inf_weightsy   s    


z"TestSample.test_sample_inf_weightsc              	   C   s6   dgd }t jtdd |jd|d W 5 Q R X d S )Nr   r   $Invalid weights: weights sum to zeror(   r#   r7   r*   )r
   r   Zzero_weightsr   r   r   test_sample_zero_weights   s    
z#TestSample.test_sample_zero_weightsc              	   C   s8   t jgd }tjtdd |jd|d W 5 Q R X d S )Nr   r@   r(   r#   r7   )r   nanr+   r,   r-   r   )r
   r   Znan_weightsr   r   r   test_sample_missing_weights   s    z&TestSample.test_sample_missing_weightsc                 C   s8   d gd }d|d< t |jdd|d|jdd  d S )Nr   r9      r6   r   r   axisr8      )r   r   r   iloc)r
   r   Zweights_with_Noner   r   r   test_sample_none_weights   s    
 z#TestSample.test_sample_none_weightszfunc_str,argznp.arrayr   r#   r6   r   )znp.random.MT19937r#   )znp.random.PCG64r:   c                 C   sh   t tddtddd}t||}|jdt||d}|jdtt||d}t|| d S )Nr         col1col2r#   r   )	r   r   r   get_objr   evalcomr   r   )r
   Zfunc_strargr   r   resultexpectedr   r   r   test_sample_random_state   s
    
z#TestSample.test_sample_random_statec                 C   s   |t d}t j }|jd|d}|jd|d}|jj|jjk rLt|jdt jdd}|jdt jdd}t	
|| d S )Nr   2   r   r:   )r   Zaranger   Zdefault_rngr   indexvaluesallr%   r   r   )r
   r   r   rngZresult1Zresult2r   r   r   test_sample_generator   s    
z TestSample.test_sample_generatorc              	   C   sL   t dtdi}t||}d}tjt|d |jddd W 5 Q R X d S )NAabczJReplace has to be set to `True` when upsampling the population `frac` > 1.r(   r   F)r   r   )r   listr   rO   r+   r,   r-   r   )r
   r   r   r/   r   r   r   *test_sample_upsampling_without_replacement   s    z5TestSample.test_sample_upsampling_without_replacementN)__name__
__module____qualname__r+   Zfixturer   markZparametrizer^   r   r"   r'   r0   r1   r3   r4   r<   r=   r?   rA   rC   rI   rU   r[   r_   r   r   r   r   r      s2   

'	
r   c                   @   s<   e Zd Zdd Zdd Zdd Zdd Zd	d
 Zdd ZdS )TestSampleDataFramec           	   	   C   s  dgd }d|d< t tddtdddgd |d}|jdd	d
}t||jdd  ttd}d}tjt	|d |jddd
 W 5 Q R X d}tjt	|d |jdddd W 5 Q R X tjt
dd |jddd
 W 5 Q R X dgd }d|d< t|jd|d
|jd d  t tddgd d}ddg}t|jdd|d|dg  t|jdd|d|dg  dgd }d|d< t|jdd|d|jdd  t|jdd|d|jdd  d}tjt	|d |jddd W 5 Q R X d}tjt	|d |jddd W 5 Q R X ttd}tjt	d d |jddd W 5 Q R X d!}tjt	|d |jdddgd d W 5 Q R X d S )"Nr   r   r6   rD   rJ   rK   a)rM   rN   	colStringeasyweightsrg   r7   rG   z@Strings cannot be passed as weights when sampling from a Series.r(   r#   Zweight_columnzLStrings can only be passed to weights when sampling from rows on a DataFrame)r   r8   rF   z-'String passed to weights not a valid column'Znot_a_real_column_namer9   rL   rE   rN   columnsZrowsrW   z)No axis named 2 for object type DataFramer   )r   rF   z2No axis named not_a_name for object type DataFrameZ
not_a_namez&No axis named 1 for object type Seriesr5   )r   r   r   r   assert_frame_equalrH   r   r+   r,   r-   KeyError)	r
   easy_weight_listdfsample1serr/   Zweights_less_than_1Zsecond_column_weightZweightr   r   r   r"      sp    
 
   
" zTestSampleDataFrame.test_samplec                 C   s|   dgd }d|d< t tddtdddgd d	}|jdd|d
}t||dg  t|jddd|jdddd d S )Nr   r#   r6   r   r   rJ   rK   re   rM   rN   rf   rE   rf   *   r   )r   rF   r   )r   r   r   r   ri   )r
   rk   rl   rm   r   r   r   test_sample_axis1$  s    
 z%TestSampleDataFrame.test_sample_axis1c              	   C   s  t dddgdddgdddd	gd
}tdddgd	ddgd
}t|jd	g |jd|d tdddgd	ddgd
}t|jd	g |jd|d tddgd	dgd
}t|jd	g |jd|d tddgddgd
}tjtdd |jd|d W 5 Q R X d S )NrD   rG      re   bcrL   	   r#   )rW   r6   r   r8   gMbP?i'  r   g{Gz?r   r@   r(   )	r   r   r   ri   locr   r+   r,   r-   )r
   rl   rn   Zser2Zser3Zser4r   r   r   %test_sample_aligns_weights_with_frame4  s    $z9TestSampleDataFrame.test_sample_aligns_weights_with_framec              	   C   sH   t tjdddddgd}|d}td  d|d< W 5 Q R X d S )	Nr   r#   re   rs   rt   )rh   r6   d)r   r   r   r	   r   r   Zassert_produces_warning)r
   rl   Zdf2r   r   r   test_sample_is_copyI  s    
z'TestSampleDataFrame.test_sample_is_copyc                 C   s   t t jdt jg}| }tdddg}|j|d t|| tdddgdt jt jgd}|d  }|jdddd	 |d }t	|| d S )
Nr6   r   r#   rv   )rX   r8   r8   g      ?T)r   r   r8   )
r   arrayrB   copyr   r   r   Zassert_numpy_array_equalr   Zassert_series_equal)r
   rS   rT   rn   rl   r   r   r   #test_sample_does_not_modify_weightsR  s    z7TestSampleDataFrame.test_sample_does_not_modify_weightsc                 C   sR   t tddtdddgd d}|jddd}ttd}tj|j|dd	 d S )
Nr   rJ   rK   re   ro   r#   T)Zignore_index)exact)r   r   r   r   r   Zassert_index_equalrW   )r
   rl   rS   Zexpected_indexr   r   r   test_sample_ignore_indexd  s    z,TestSampleDataFrame.test_sample_ignore_indexN)	r`   ra   rb   r"   rq   rx   rz   r}   r   r   r   r   r   rd      s   U	rd   )Znumpyr   r+   Zpandasr   r   r   Zpandas._testingZ_testingr   Zpandas.core.commoncorecommonrQ   r   rd   r   r   r   r   <module>   s    ?