I have a Dictionary in python which have some blank values. i want to fill that blank values with numbers consecutively in a row.

Below is my dictionary dataset which have blank values

Dict1 = {"BM":["A","B","C"],"ASM":["D","E","F"],"CSM":[""],"DSM":[""],"RSM":["G","H"],"ZSM":["I"],"NSM":["J","","l"]}

I tried below code

`max_length = max(len(lst) for lst in designation_dict.values())

# Pad the lists in the designation dictionary with 'L{n}' to make them equal length
for key in designation_dict:
    for i in range(max_length):
        if i < len(designation_dict[key]):
            if designation_dict[key][i] == "":
                designation_dict[key][i] = f'L{i+1}'
        else:
            designation_dict[key].append(f'L{i+1}')
`

This code retunrs below output

{'BM': ['A', 'B', 'C'],
 'ASM': ['D', 'E', 'F'],
 'CSM': ['L1', 'L2', 'L3'],
 'DSM': ['L1', 'L2', 'L3'],
 'RSM': ['G', 'H', 'L3'],
 'ZSM': ['I', 'L2', 'L3'],
 'NSM': ['J', 'L2', 'l']}

but my expected output is

{'BM': ['A', 'B', 'C'],
 'ASM': ['D', 'E', 'F'],
 'CSM': ['L1', 'L1', 'L1'],
 'DSM': ['L2', 'L2', 'L2'],
 'RSM': ['G', 'H', 'L3'],
 'ZSM': ['I', 'L3', 'L4'],
 'NSM': ['J', 'L4', 'l']}