gistfile1.txt

In [1]: from itertools import chain, repeat, islice 
   ...:  
   ...: def pad_infinite(iterable, padding=None): 
   ...:    return chain(iterable, repeat(padding)) 
   ...:  
   ...: def pad(iterable, size, padding=None): 
   ...:    return islice(pad_infinite(iterable, padding), size) 
   ...:                                                                                                                                                                    
In [2]: from collections import defaultdict 
In [3]: import pandas as pd
In [4]: mb_funcs = defaultdict(list)
In [5]: with open("new-mb-funcs.txt", "r") as new_mb_funcs: 
   ...:     for line in new_mb_funcs: 
   ...:         mb_funcs[line.split()[-1].rstrip('(')].append(line.split()[1])
In [7]: for key in mb_funcs.keys(): 
   ...:     mb_funcs[key] = list(pad(mb_funcs[key], 150, padding=''))
In [8]: df = pd.DataFrame(mb_funcs)                                                                                                                                        
In [9]: df.to_csv("mb_func_locations.csv", index=None, header=True)