dump_sections.py doesn't calculate last_bank

[kanzure]

$ python dump_sections.py
Traceback (most recent call last):
  File "dump_sections.py", line 126, in <module>
    output = dump_sections(baserom)
  File "dump_sections.py", line 83, in dump_sections
    last_bank = calculate_bank_quantity(path, bank_size=bank_size)
  File "dump_sections.py", line 46, in calculate_bank_quantity
    return float(os.lstat(path).st_size) / bank_size
OSError: [Errno 2] No such file or directory: 'baserom.gbc'

and then:

$ python dump_sections.py
Traceback (most recent call last):
  File "dump_sections.py", line 126, in <module>
    output = dump_sections(baserom)
  File "dump_sections.py", line 92, in dump_sections
    banks = range(initial_bank, last_bank)
TypeError: range() integer end argument expected, got float.

wtf?

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Above report is from pokecrystal issue 141.