Pandas read_csv fails
add this : lineterminator = ':'
I am using pandas read_csv to open a csv file 1327x11. The first 265 rows are only 4 columns wide. Here is row 1 to 5
DWS_LENS1.converter,"-300.0,5.5; -0.1,5.5; 10.0,-5.5; 300.0,-5.5",(mass->volts),:  DWS_LENS1.mass_dependent,false,:
DWS_LENS1.voltage.reading,-5.12642,V,:
DWS_LENS1.voltage.target,-4.95000,V,: 
DWS_LENS2.converter,"-300.0,20.0; -10.0,20.0; 10.0,-20.0; 300.0,-20.0",(mass->volts),:
and here are some other rows :   
157955,SAMPLE,,,,1760.5388,,,,:
,: 
Summary,:
,: 
Analyte,H3O+ (ppb),NO+ (ppb),O2+ (ppb),O- (ppb),OH- (ppb),: 
toluene,1872.7367,,,,,: 
isobutane,,1945.7385,,,,:
hexafluorobenzene,,,1951.0644,2121.6486,,:
tetrafluorobenzene,,,,,1599.5802,:
I receive Error tokenizing data. C error: Expected 4 fields in line 266, saw 11
I tried 
df=pd.read_csv(test,error_bad_lines=False)
but it skips most rows and returns a 491x4 table.
If I use pd.read_csv(test,delim_whitespace=True,error_bad_lines=False)
I obtain a 1300x4 table but it fails splitting some data.
How can I have the 11 columns back?