在熊猫中使用to_csv函数时如何解决定界符错误

Question

This is a followup question on how to write a single row cell by cell and fill it in csv file

 import pandas as pd
 delim = "@@@"
 # just for abrevation
 tmp = pd.read_csv("mycsv.csv",sep='@@@')
 tmp.loc[0,:] = "None"
 tmp.to_csv("mycsv.csv",sep=delim,index=False)

I am getting follow error . Please suggest some correct solution

self.writer = csv.writer(f, **writer_kwargs)
TypeError: "delimiter" must be a 1-character string
Exception ignored in: <module 'threading' from 
Traceback (most recent call last):
  line 1296, in _shutdown
 _main_thread._delete()
File /share/python-3.6.1/linux_x86_64/lib/python3.6/threading.py", line 1015, 
in _delete
del _active[get_ident()]
KeyError: 140613724829696

Answer 1

As per the Error and the to_csv documentation, it supports only one character.

Whereas read_csv supports str . That's why it works why reading and failing at writing. You might need to change the delimiter to one character.