| path_or_buf : string or file handle, default None
File path or object, if None is provided the result is returned as a string.
文件路径或对象，如果没有提供，则结果将作为字符串返回
sep : character, default ‘,’
Field delimiter for the output file.
输出文件的字段分隔符。
na_rep : string, default ‘’
Missing data representation
缺失数据表示
float_format : string, default None
Format string for floating point numbers
浮点数的转为字符串
columns : sequence, optional
Columns to write
要写的列
header : boolean or list of string, default True
Write out the column names. If a list of strings is given it is assumed to be aliases for the column names
写出列名。如果给出了字符串列表，则假定它是列名的别名
index : boolean, default True
Write row names (index)
写行名（索引）
index_label : string or sequence, or False, default None
Column label for index column(s) if desired. If None is given, and header and indexare True, then the index names are used. A sequence should be given if the DataFrame uses MultiIndex. If False do not print fields for index names. Use index_label=False for easier importing in R
索引列的列标签（如果需要）。如果给出None，并且header和index为True，则使用索引名称。如果DataFrame使用MultiIndex，则应该给出一个序列。如果为False，则不输出索引名称的字段。使用index_label = False可以更轻松地导入R
mode : str
Python write mode, default ‘w’
写的模式：str
encoding : string, optional
A string representing the encoding to use in the output file, defaults to ‘ascii’ on Python 2 and ‘utf-8’ on Python 3.
表示要在输出文件中使用的编码的字符串，默认为Python 2上的“ascii”和Python 3上的“utf-8”。
compression : string, optional
A string representing the compression to use in the output file. Allowed values are ‘gzip’, ‘bz2’, ‘zip’, ‘xz’. This input is only used when the first argument is a filename.
表示要在输出文件中使用的压缩的字符串。允许的值为'gzip'，'bz2'，'zip'，'xz'。仅当第一个参数是文件名时才使用此输入
line_terminator : string, default '\n'
The newline character or character sequence to use in the output file
要在输出文件中使用的换行符或字符序列
quoting : optional constant from csv module
defaults to csv.QUOTE_MINIMAL. If you have set a float_format then floats are converted to strings and thus csv.QUOTE_NONNUMERIC will treat them as non-numeric
quotechar : string (length 1), default ‘”’
character used to quote fields
doublequote : boolean, default True
Control quoting of quotechar inside a field
escapechar : string (length 1), default None
character used to escape sep and quotechar when appropriate
chunksize : int or None
rows to write at a time
tupleize_cols : boolean, default False
Deprecated since version 0.21.0: This argument will be removed and will always write each row of the multi-index as a separate row in the CSV file.
Write MultiIndex columns as a list of tuples (if True) or in the new, expanded format, where each MultiIndex column is a row in the CSV (if False).
date_format : string, default None
Format string for datetime objects
decimal: string, default ‘.’
Character recognized as decimal separator. E.g. use ‘,’ for European data
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