34 lines
902 B
Python
34 lines
902 B
Python
from os import listdir, path
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def add_zeros(v: int, digits=3):
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"""
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return v as string, add leading zeros if len(str(v)) < digits
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"""
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s = str(v)
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return '0' * (max(digits - len(s), 0)) + s
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def get_next_filename(basename, directory=".", digits=3):
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"""
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get the next filename (without extenstion).
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example:
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basename = file
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directory has file001, file002, file004
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-> return file005
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"""
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files = listdir(directory)
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files.sort()
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files.reverse()
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lowest_number = 0
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for file in files:
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if not path.isfile(file): continue
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if not file.startswith(basename): continue
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try:
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number = int(file.split('.')[0].strip(basename))
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if number < lowest_number: continue
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lowest_number = number
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except ValueError:
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continue
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return basename + add_zeros(lowest_number)
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