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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def scanf_compile(format, collapseWhitespace=True):
 """ Translate the format into a regular expression For example: (\S+) \- ([+-]?\d+) errors, ([+-]?\d+) warnings Translated formats are cached for faster reuse """


    format_pat = ""
    cast_list = []
    i = 0
    length = len(format)
    while i < length:
        found = None
        for token, pattern, cast in scanf_translate:
            found = token.match(format, i)
            if found:
                if cast: # cast != None
                    cast_list.append(cast)
                groups = found.groupdict() or found.groups()
                if groups:
                    pattern = pattern % groups
                format_pat += pattern
                i = found.end()
                break
        if not found:
            char = format[i]
            # escape special characters
            if char in "|^$()[]-.+*?{}<>\\":
                format_pat += "\\"
            format_pat += char
            i += 1
    if DEBUG:
        print("DEBUG: %r -> %s" % (format, format_pat))
    if collapseWhitespace:
        format_pat = re.sub(r'\s+', r'\\s+', format_pat)

    format_re = re.compile(format_pat)
    return format_re, cast_list