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B �5�g � @ s� d dl mZ d dlmZ d dlZd dlmZ d dlZd dlm Z d dl Z d dl Z d dl m Z mZ d dlZd dlmZ edd � �Zed d �d d ��Zed ddd�dd��Zedd� �Zedd� �Zedd� �Zed dd��ZG d d � d �ZdS ) � )� annotations)�contextmanagerN)�Path)�rmtree)�IO�Any)� get_handlec c s( t | d|dd��}|jV W dQ R X dS )a Open a compressed file and return a file object. Parameters ---------- path : str The path where the file is read from. compression : {'gzip', 'bz2', 'zip', 'xz', None} Name of the decompression to use Returns ------- file object �rbF)� compressionZis_textN)r �handle)�pathr r � r �N/home/digitalm-up/venv/lib/python3.7/site-packages/pandas/_testing/contexts.py�decompress_file s r �str)�tzc # sL ddl � ddl�� �fdd�}� j�d�}|| � z dV W d||� X dS )a� Context manager for temporarily setting a timezone. Parameters ---------- tz : str A string representing a valid timezone. Examples -------- >>> from datetime import datetime >>> from dateutil.tz import tzlocal >>> tzlocal().tzname(datetime.now()) 'IST' >>> with set_timezone('US/Eastern'): ... tzlocal().tzname(datetime.now()) ... 'EDT' r Nc sB | d kr,y � j d= W q> tk r( Y q>X n| � j d< ��� d S )N�TZ)�environ�KeyError�tzset)r )�os�timer r �setTZB s zset_timezone.<locals>.setTZr )r r r �get)r r Zorig_tzr )r r r � set_timezone) s r F�boolr )�return_filelike�kwargsc k s� t t�� �}| dkrd} d�tjtjtj dd��| } || }|� � t |�}|rl|� dd� t |f|�}z |V W dt |t �s�|�� |�� r�|�� X dS )az Gets a temporary path and agrees to remove on close. This implementation does not use tempfile.mkstemp to avoid having a file handle. If the code using the returned path wants to delete the file itself, windows requires that no program has a file handle to it. Parameters ---------- filename : str (optional) suffix of the created file. return_filelike : bool (default False) if True, returns a file-like which is *always* cleaned. Necessary for savefig and other functions which want to append extensions. **kwargs Additional keywords are passed to open(). N� � )�k�modezw+b)r �tempfile� gettempdir�join�random�choices�string� ascii_letters�digits�touchr � setdefault�open� isinstance�close�is_file�unlink)�filenamer r �folderr Z handle_or_strr r r � ensure_cleanT s r3 c c s@ t jdd�} z | V W dy t| � W n tk r8 Y nX X dS )z{ Get a temporary directory path and agrees to remove on close. Yields ------ Temporary directory path r )�suffixN)r" �mkdtempr �OSError)Zdirectory_namer r r �ensure_clean_dir� s r7 c c s2 t tj�} z dV W dtj�� tj�| � X dS )z� Get a context manager to safely set environment variables All changes will be undone on close, hence environment variables set within this contextmanager will neither persist nor change global state. N)�dictr r �clear�update)Z saved_environr r r �!ensure_safe_environment_variables� s r; c k sD ddl }dddh}| |kr"td��|j| f|� dV |�| � dS )au Context manager to temporarily register a CSV dialect for parsing CSV. Parameters ---------- name : str The name of the dialect. kwargs : mapping The parameters for the dialect. Raises ------ ValueError : the name of the dialect conflicts with a builtin one. See Also -------- csv : Python's CSV library. r N�excelz excel-tab�unixz Cannot override builtin dialect.)�csv� ValueError�register_dialect�unregister_dialect)�namer r> Z_BUILTIN_DIALECTSr r r �with_csv_dialect� s rC c c sP ddl m} |d kr|j}|j}|j}|�| � ||_d V ||_|�|� d S )Nr )� expressions)Zpandas.core.computationrD Z _MIN_ELEMENTSZ USE_NUMEXPRZset_use_numexpr)ZuseZ min_elements�exprZolduseZoldminr r r � use_numexpr� s rF c @ s( e Zd ZdZdd� Zdd� Zdd� ZdS ) � RNGContexta, Context manager to set the numpy random number generator speed. Returns to the original value upon exiting the context manager. Parameters ---------- seed : int Seed for numpy.random.seed Examples -------- with RNGContext(42): np.random.randn() c C s || _ d S )N)�seed)�selfrH r r r �__init__� s zRNGContext.__init__c C s t j�� | _t j�| j� d S )N)�npr% Z get_state� start_staterH )rI r r r � __enter__� s zRNGContext.__enter__c C s t j�| j� d S )N)rK r% Z set_staterL )rI �exc_type� exc_value� tracebackr r r �__exit__� s zRNGContext.__exit__N)�__name__� __module__� __qualname__�__doc__rJ rM rQ r r r r rG � s rG )NF)N)� __future__r � contextlibr r �pathlibr r% �shutilr r' r" �typingr r �numpyrK Zpandas.io.commonr r r r3 r7 r; rC rF rG r r r r �<module> s( +,
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