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How to use _is_printable method in Slash

Best Python code snippet using slash

parameter_types.py

Source:parameter_types.py

...14"""15import re16import unicodedata17import six18def _is_printable(char):19    """determine if a unicode code point is printable.20    This checks if the character is either "other" (mostly control21    codes), or a non-horizontal space. All characters that don't match22    those criteria are considered printable; that is: letters;23    combining marks; numbers; punctuation; symbols; (horizontal) space24    separators.25    """26    category = unicodedata.category(char)27    return (not category.startswith("C") and28            (not category.startswith("Z") or category == "Zs"))29def _get_all_chars():30    for i in range(0xFFFF):31        yield six.unichr(i)32# build a regex that matches all printable characters. This allows33# spaces in the middle of the name. Also note that the regexp below34# deliberately allows the empty string. This is so only the constraint35# which enforces a minimum length for the name is triggered when an36# empty string is tested. Otherwise it is not deterministic which37# constraint fails and this causes issues for some unittests when38# PYTHONHASHSEED is set randomly.39def _build_regex_range(ws=True, invert=False, exclude=None):40    """Build a range regex for a set of characters in utf8.41    This builds a valid range regex for characters in utf8 by42    iterating the entire space and building up a set of x-y ranges for43    all the characters we find which are valid.44    :param ws: should we include whitespace in this range.45    :param exclude: any characters we want to exclude46    :param invert: invert the logic47    The inversion is useful when we want to generate a set of ranges48    which is everything that's not a certain class. For instance,49    produce all all the non printable characters as a set of ranges.50    """51    if exclude is None:52        exclude = []53    regex = ""54    # are we currently in a range55    in_range = False56    # last character we found, for closing ranges57    last = None58    # last character we added to the regex, this lets us know that we59    # already have B in the range, which means we don't need to close60    # it out with B-B. While the later seems to work, it's kind of bad form.61    last_added = None62    def valid_char(char):63        if char in exclude:64            result = False65        elif ws:66            result = _is_printable(char)67        else:68            # Zs is the unicode class for space characters, of which69            # there are about 10 in this range.70            result = (_is_printable(char) and71                      unicodedata.category(char) != "Zs")72        if invert is True:73            return not result74        return result75    # iterate through the entire character range. in_76    for c in _get_all_chars():77        if valid_char(c):78            if not in_range:79                regex += re.escape(c)80                last_added = c81            in_range = True82        else:83            if in_range and last != last_added:84                regex += "-" + re.escape(last)...

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