cmd/brename.py

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Python
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'''
Batch rename files by providing a string to be `eval`ed, using variable `x` as
the current filename.
Yes I know this is weird, but for certain tasks it's just too quick and easy to pass up.
For example:
Prefix all the files:
brename.py "'Test_' + x"
Keep the first word and extension:
brename.py "(x.split(' ')[0] + '.' + x.split('.')[-1]) if ' ' in x else x"
'''
import argparse
import os
import random
import re
import sys
from voussoirkit import safeprint
from voussoirkit import spinal
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apostrophe = "'"
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dot = '.'
hyphen = '-'
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quote = '"'
space = ' '
underscore = '_'
def brename(transformation, autoyes=False, recurse=False):
if recurse:
olds = [x.absolute_path for x in spinal.walk_generator('.')]
else:
olds = [os.path.join(os.getcwd(), x) for x in os.listdir('.')]
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news = []
for (index, x) in enumerate(olds):
directory = os.path.dirname(x)
basename = os.path.basename(x)
(noext, ext) = os.path.splitext(basename)
x = basename
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x = eval(transformation)
x = os.path.join(directory, x)
news.append(x)
pairs = [(x, y) for (x, y) in zip(olds, news) if x != y]
if not pairs:
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print('Nothing to replace')
return
loop(pairs, dry=True)
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ok = autoyes
if not ok:
print('Is this correct? y/n')
ok = input('>').lower() in ('y', 'yes', 'yeehaw')
if ok:
loop(pairs, dry=False)
def excise(s, mark_left, mark_right):
'''
Remove the text between the left and right landmarks, inclusive, returning
the rest of the text.
excise('What a wonderful day [soundtrack].mp3', ' [', ']') ->
returns 'What a wonderful day.mp3'
'''
return s.split(mark_left)[0] + s.split(mark_right)[-1]
def longest_length(li):
longest = 0
for item in li:
longest = max(longest, len(item))
return longest
def loop(pairs, dry=False):
for (old, new) in pairs:
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if dry:
line = f'{old}\n{new}\n'
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safeprint.safeprint(line)
else:
os.rename(old, new)
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def title(text):
(text, extension) = os.path.splitext(text)
text = text.title()
if ' ' in text:
(first, rest) = text.split(' ', 1)
else:
(first, rest) = (text, '')
rest = ' %s ' % rest
for article in ['The', 'A', 'An', 'At', 'To', 'In', 'Of', 'From', 'And']:
article = ' %s ' % article
rest = rest.replace(article, article.lower())
rest = rest.strip()
if rest != '':
rest = ' ' + rest
text = first + rest + extension
return text
def brename_argparse(args):
brename(args.transformation, autoyes=args.autoyes, recurse=args.recurse)
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def main(argv):
parser = argparse.ArgumentParser(description=__doc__)
parser.add_argument('transformation', help='python command using x as variable name')
parser.add_argument('-y', '--yes', dest='autoyes', action='store_true', help='accept results without confirming')
parser.add_argument('--recurse', dest='recurse', action='store_true', help='operate on subdirectories also')
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parser.set_defaults(func=brename_argparse)
args = parser.parse_args(argv)
args.func(args)
if __name__ == '__main__':
raise SystemExit(main(sys.argv[1:]))