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88 lines
4.1 KiB
ReStructuredText
88 lines
4.1 KiB
ReStructuredText
========================================
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:mod:`util` - Miscellaneous utilities
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========================================
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.. module:: misc
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.. function:: nonone(value, replace_value)
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Returns ``value`` if value is not None. Returns ``replace_value`` otherwise.
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.. function:: dedupe(iterable)
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Returns a list of elements in ``iterable`` with all dupes removed. The order of the elements is preserved.
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.. function:: flatten(iterables, start_with=None)
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Takes the list of iterable ``iterables`` and returns a list containing elements of every iterable.
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If ``start_with`` is not None, the result will start with ``start_with`` items, exactly as if ``start_with`` would be the first item of lists.
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.. function:: first(iterable)
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Returns the first item of ``iterable`` or ``None`` if empty.
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.. function:: tryint(value, default=0)
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Tries to convert ``value`` to in ``int`` and returns ``default`` if it fails.
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.. function:: escape(s, to_escape, escape_with='\\')
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Returns ``s`` with characters in ``to_escape`` all prepended with ``escape_with``.
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.. function:: format_size(size, decimal=0, forcepower=-1, showdesc=True)
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Transform a byte count ``size`` in a formatted string (KB, MB etc..). ``decimal`` is the number digits after the dot. ``forcepower`` is the desired suffix. 0 is B, 1 is KB, 2 is MB etc.. if kept at -1, the suffix will be automatically chosen (so the resulting number is always below 1024). If ``showdesc`` is True, the suffix will be shown after the number. Usage example::
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>>> format_size(1234, decimal=2, showdesc=True)
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'1.21 KB'
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.. function:: format_time(seconds, with_hours=True)
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Transforms seconds in a hh:mm:ss string.
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If `with_hours` if false, the format is mm:ss.
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.. function:: format_time_decimal(seconds)
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Transforms seconds in a strings like '3.4 minutes'.
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.. function:: get_file_ext(filename)
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Returns the lowercase extension part of ``filename``, without the dot.
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.. function:: pluralize(number, word, decimals=0, plural_word=None)
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Returns a string with ``number`` in front of ``word``, and adds a 's' to ``word`` if ``number`` > 1. If ``plural_word`` is defined, it will replace ``word`` in plural cases instead of appending a 's'.
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.. function:: rem_file_ext(filename)
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Returns ``filename`` without extension.
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.. function:: multi_replace(s, replace_from, replace_to='')
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A function like str.replace() with multiple replacements. ``replace_from`` is a list of things you want to replace (Ex: ``['a','bc','d']``). ``replace_to`` is a list of what you want to replace to. If ``replace_to`` is a list and has the same length as ``replace_from``, ``replace_from`` items will be translated to corresponding ``replace_to``. A ``replace_to`` list must have the same length as ``replace_from``. If ``replace_to`` is a string, all ``replace_from`` occurences will be replaced by that string. ``replace_from`` can also be a string. If it is, every char in it will be translated as if ``replace_from`` would be a list of chars. If ``replace_to`` is a string and has the same length as ``replace_from``, it will be transformed into a list.
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.. function:: open_if_filename(infile, mode='rb')
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If ``infile`` is a string, it opens and returns it. If it's already a file object, it simply returns it. This function returns ``(file, should_close_flag)``. The should_close_flag is True is a file has effectively been opened (if we already pass a file object, we assume that the responsibility for closing the file has already been taken). Example usage::
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fp, shouldclose = open_if_filename(infile)
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dostuff()
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if shouldclose:
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fp.close()
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.. class:: FileOrPath(file_or_path, mode='rb')
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Does the same as :func:`open_if_filename`, but it can be used with a ``with`` statement. Example::
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with FileOrPath(infile):
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dostuff()
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.. function:: delete_if_empty(path, files_to_delete=[])
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Same as with :func:`clean_empty_dirs`, but not recursive.
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.. function:: modified_after(first_path, second_path)
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Returns True if ``first_path``'s mtime is higher than ``second_path``'s mtime. |