pandas.Series.to_csv   Series.to_csv(path_or_buf=None, sep=',', na_rep='', float_format=None, columns=None, header=True, index=True, index_label=None, mode='w', encoding=None, compression='infer', quoting=None, quotechar='"', line_terminator=None, chunksize=None, date_format=None, doublequote=True, escapechar=None, decimal='.', errors='strict', storage_options=None)[source]
 
Write object to a comma-separated values (csv) file.  Parameters 
 
path_or_buf:str, path object, file-like object, or None, default None


String, path object (implementing os.PathLike[str]), or file-like object implementing a write() function. If None, the result is returned as a string. If a non-binary file object is passed, it should be opened with newline=’’, disabling universal newlines. If a binary file object is passed, mode might need to contain a ‘b’.  Changed in version 1.2.0: Support for binary file objects was introduced.   
sep:str, default ‘,’


String of length 1. Field delimiter for the output file.  
na_rep:str, default ‘’


Missing data representation.  
float_format:str, default None


Format string for floating point numbers.  
columns:sequence, optional


Columns to write.  
header:bool or list of str, default True


Write out the column names. If a list of strings is given it is assumed to be aliases for the column names.  
index:bool, default True


Write row names (index).  
index_label:str or sequence, or False, default None


Column label for index column(s) if desired. If None is given, and header and index are True, then the index names are used. A sequence should be given if the object uses MultiIndex. If False do not print fields for index names. Use index_label=False for easier importing in R.  
mode:str


Python write mode, default ‘w’.  
encoding:str, optional


A string representing the encoding to use in the output file, defaults to ‘utf-8’. encoding is not supported if path_or_buf is a non-binary file object.  
compression:str or dict, default ‘infer’


For on-the-fly compression of the output data. If ‘infer’ and ‘%s’ path-like, then detect compression from the following extensions: ‘.gz’, ‘.bz2’, ‘.zip’, ‘.xz’, or ‘.zst’ (otherwise no compression). Set to None for no compression. Can also be a dict with key 'method' set to one of {'zip', 'gzip', 'bz2', 'zstd'} and other key-value pairs are forwarded to zipfile.ZipFile, gzip.GzipFile, bz2.BZ2File, or zstandard.ZstdDecompressor, respectively. As an example, the following could be passed for faster compression and to create a reproducible gzip archive: compression={'method': 'gzip', 'compresslevel': 1, 'mtime': 1}.  Changed in version 1.0.0: May now be a dict with key ‘method’ as compression mode and other entries as additional compression options if compression mode is ‘zip’.   Changed in version 1.1.0: Passing compression options as keys in dict is supported for compression modes ‘gzip’, ‘bz2’, ‘zstd’, and ‘zip’.   Changed in version 1.2.0: Compression is supported for binary file objects.   Changed in version 1.2.0: Previous versions forwarded dict entries for ‘gzip’ to gzip.open instead of gzip.GzipFile which prevented setting mtime.   
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:str, default ‘"’


String of length 1. Character used to quote fields.  
line_terminator:str, optional


The newline character or character sequence to use in the output file. Defaults to os.linesep, which depends on the OS in which this method is called (’\n’ for linux, ‘\r\n’ for Windows, i.e.).  
chunksize:int or None


Rows to write at a time.  
date_format:str, default None


Format string for datetime objects.  
doublequote:bool, default True


Control quoting of quotechar inside a field.  
escapechar:str, default None


String of length 1. Character used to escape sep and quotechar when appropriate.  
decimal:str, default ‘.’


Character recognized as decimal separator. E.g. use ‘,’ for European data.  
errors:str, default ‘strict’


Specifies how encoding and decoding errors are to be handled. See the errors argument for open() for a full list of options.  New in version 1.1.0.   
storage_options:dict, optional


Extra options that make sense for a particular storage connection, e.g. host, port, username, password, etc. For HTTP(S) URLs the key-value pairs are forwarded to urllib as header options. For other URLs (e.g. starting with “s3://”, and “gcs://”) the key-value pairs are forwarded to fsspec. Please see fsspec and urllib for more details.  New in version 1.2.0.     Returns 
 None or str

If path_or_buf is None, returns the resulting csv format as a string. Otherwise returns None.      See also  read_csv

Load a CSV file into a DataFrame.  to_excel

Write DataFrame to an Excel file.    Examples 
>>> df = pd.DataFrame({'name': ['Raphael', 'Donatello'],
...                    'mask': ['red', 'purple'],
...                    'weapon': ['sai', 'bo staff']})
>>> df.to_csv(index=False)
'name,mask,weapon\nRaphael,red,sai\nDonatello,purple,bo staff\n'
  Create ‘out.zip’ containing ‘out.csv’ 
>>> compression_opts = dict(method='zip',
...                         archive_name='out.csv')  
>>> df.to_csv('out.zip', index=False,
...           compression=compression_opts)  
  To write a csv file to a new folder or nested folder you will first need to create it using either Pathlib or os: 
>>> from pathlib import Path  
>>> filepath = Path('folder/subfolder/out.csv')  
>>> filepath.parent.mkdir(parents=True, exist_ok=True)  
>>> df.to_csv(filepath)  
  
>>> import os  
>>> os.makedirs('folder/subfolder', exist_ok=True)  
>>> df.to_csv('folder/subfolder/out.csv')