pd.to_csv详解

1.首先查询当前的工作路径:

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  1. import os  
  2. os.getcwd() #获取当前工作路径  
2.to_csv()是DataFrame类的方法,read_csv()是pandas的方法

转自:https://blog.csdn.net/toshibahuai/article/details/79034829

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  1. dt.to_csv() #默认dt是DataFrame的一个实例,参数解释如下  

  • 路径 path_or_buf: A string path to the file to write or a StringIO
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  1. dt.to_csv('Result.csv'#相对位置,保存在getwcd()获得的路径下  
  2. dt.to_csv('C:/Users/think/Desktop/Result.csv'#绝对位置  

  • 分隔符 sep : Field delimiter for the output file (default ”,”)
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  1. dt.to_csv('C:/Users/think/Desktop/Result.csv',sep='?')#使用?分隔需要保存的数据,如果不写,默认是,  

  • 替换空值 na_rep: A string representation of a missing value (default ‘’)
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  1. dt.to_csv('C:/Users/think/Desktop/Result1.csv',na_rep='NA'#确实值保存为NA,如果不写,默认是空  

  • 格式 float_format: Format string for floating point numbers
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  1. dt.to_csv('C:/Users/think/Desktop/Result1.csv',float_format='%.2f'#保留两位小数  

  • 是否保留某列数据 cols: Columns to write (default None)
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  1. dt.to_csv('C:/Users/think/Desktop/Result.csv',columns=['name']) #保存索引列和name列  

  • 是否保留列名 header: Whether to write out the column names (default True)
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  1. dt.to_csv('C:/Users/think/Desktop/Result.csv',header=0#不保存列名  

  • 是否保留行索引 index:  whether to write row (index) names (default True)
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  1. dt.to_csv('C:/Users/think/Desktop/Result1.csv',index=0#不保存行索引  

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