I have some csv data in the following format.

Ln      Dr      Tag      Lab       0:01   0:02  0:03  0:04   0:05  0:06  0:07  
0:08  0:09       
L0      St       vT      4R          0         0         0        0         0   
   0         0        0       0         
L2      Tx       st      4R          8         8         8        8         8   
    8        8        8       8 
L2      Tx       ss      4R          1         1         9        6         1   
    0        0        6       7 

I want to plot a timeseries graph using the columns (`Ln` , `Dr`, `Tg`,`Lab`) 
as the keys and the `0:0n ` field as values on a timeseries graph.I want all 
the timeseries to be plotted on a single timeseries? 

I have the following code.

    #!/usr/bin/env python

    import matplotlib.pyplot as plt 
    import datetime
    import numpy as np
    import csv 
    import sys 
    
    
    with open("test.csv", 'r', newline='') as fin:
        reader = csv.DictReader(fin)
        for row in reader:
              key = (row['Ln'], row['Dr'], row['Tg'],row['Lab'])
              #code to extract the values and plot a timeseries.                
                                                                                
                                                                             
    ~  

How do I extract all the values in columns `0:0n` without induviduall 
specifying each one of them. 
                            
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