read_csv character encoding bug?

This is a weird one from StackOverflow, this file has some \x00s which seem to be ignored when printing but confuse read_csv:

x = 'x,y\n \x00\x00\x00,Reg\n \x00\x00\x00,Reg\nI,Swp\nI,Swp\n'
X = StringIO(x)

In [3]: pd.read_csv(X)
Out[3]: 
     x    y
0          
1  NaN  NaN
2    I  Swp
3    I  Swp

In [4]: print x
x,y
 ,Reg
 ,Reg
I,Swp
I,Swp

[jreback]

if u want to put up tests for the c engine and s nice error message Python engine then can close

[wesm]

Seems like if you can address the regex delimiter problem (easier said than done) then it may be possible to deprecate the Python engine. This would be easier in the possible pandas 2.0 future in which we might add libre2 to the build / development toolchain