Showing the changes to sys/lib/python/UserString.py (1 of 3706 files). Show all
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| 1 | +#!/usr/bin/env python | |
| 2 | +## vim:ts=4:et:nowrap | |
| 3 | +"""A user-defined wrapper around string objects | |
| 4 | + | |
| 5 | +Note: string objects have grown methods in Python 1.6 | |
| 6 | +This module requires Python 1.6 or later. | |
| 7 | +""" | |
| 8 | +import sys | |
| 9 | + | |
| 10 | +__all__ = ["UserString","MutableString"] | |
| 11 | + | |
| 12 | +class UserString: | |
| 13 | + def __init__(self, seq): | |
| 14 | + if isinstance(seq, basestring): | |
| 15 | + self.data = seq | |
| 16 | + elif isinstance(seq, UserString): | |
| 17 | + self.data = seq.data[:] | |
| 18 | + else: | |
| 19 | + self.data = str(seq) | |
| 20 | + def __str__(self): return str(self.data) | |
| 21 | + def __repr__(self): return repr(self.data) | |
| 22 | + def __int__(self): return int(self.data) | |
| 23 | + def __long__(self): return long(self.data) | |
| 24 | + def __float__(self): return float(self.data) | |
| 25 | + def __complex__(self): return complex(self.data) | |
| 26 | + def __hash__(self): return hash(self.data) | |
| 27 | + | |
| 28 | + def __cmp__(self, string): | |
| 29 | + if isinstance(string, UserString): | |
| 30 | + return cmp(self.data, string.data) | |
| 31 | + else: | |
| 32 | + return cmp(self.data, string) | |
| 33 | + def __contains__(self, char): | |
| 34 | + return char in self.data | |
| 35 | + | |
| 36 | + def __len__(self): return len(self.data) | |
| 37 | + def __getitem__(self, index): return self.__class__(self.data[index]) | |
| 38 | + def __getslice__(self, start, end): | |
| 39 | + start = max(start, 0); end = max(end, 0) | |
| 40 | + return self.__class__(self.data[start:end]) | |
| 41 | + | |
| 42 | + def __add__(self, other): | |
| 43 | + if isinstance(other, UserString): | |
| 44 | + return self.__class__(self.data + other.data) | |
| 45 | + elif isinstance(other, basestring): | |
| 46 | + return self.__class__(self.data + other) | |
| 47 | + else: | |
| 48 | + return self.__class__(self.data + str(other)) | |
| 49 | + def __radd__(self, other): | |
| 50 | + if isinstance(other, basestring): | |
| 51 | + return self.__class__(other + self.data) | |
| 52 | + else: | |
| 53 | + return self.__class__(str(other) + self.data) | |
| 54 | + def __mul__(self, n): | |
| 55 | + return self.__class__(self.data*n) | |
| 56 | + __rmul__ = __mul__ | |
| 57 | + def __mod__(self, args): | |
| 58 | + return self.__class__(self.data % args) | |
| 59 | + | |
| 60 | + # the following methods are defined in alphabetical order: | |
| 61 | + def capitalize(self): return self.__class__(self.data.capitalize()) | |
| 62 | + def center(self, width, *args): | |
| 63 | + return self.__class__(self.data.center(width, *args)) | |
| 64 | + def count(self, sub, start=0, end=sys.maxint): | |
| 65 | + return self.data.count(sub, start, end) | |
| 66 | + def decode(self, encoding=None, errors=None): # XXX improve this? | |
| 67 | + if encoding: | |
| 68 | + if errors: | |
| 69 | + return self.__class__(self.data.decode(encoding, errors)) | |
| 70 | + else: | |
| 71 | + return self.__class__(self.data.decode(encoding)) | |
| 72 | + else: | |
| 73 | + return self.__class__(self.data.decode()) | |
| 74 | + def encode(self, encoding=None, errors=None): # XXX improve this? | |
| 75 | + if encoding: | |
| 76 | + if errors: | |
| 77 | + return self.__class__(self.data.encode(encoding, errors)) | |
| 78 | + else: | |
| 79 | + return self.__class__(self.data.encode(encoding)) | |
| 80 | + else: | |
| 81 | + return self.__class__(self.data.encode()) | |
| 82 | + def endswith(self, suffix, start=0, end=sys.maxint): | |
| 83 | + return self.data.endswith(suffix, start, end) | |
| 84 | + def expandtabs(self, tabsize=8): | |
| 85 | + return self.__class__(self.data.expandtabs(tabsize)) | |
| 86 | + def find(self, sub, start=0, end=sys.maxint): | |
| 87 | + return self.data.find(sub, start, end) | |
| 88 | + def index(self, sub, start=0, end=sys.maxint): | |
| 89 | + return self.data.index(sub, start, end) | |
| 90 | + def isalpha(self): return self.data.isalpha() | |
| 91 | + def isalnum(self): return self.data.isalnum() | |
| 92 | + def isdecimal(self): return self.data.isdecimal() | |
| 93 | + def isdigit(self): return self.data.isdigit() | |
| 94 | + def islower(self): return self.data.islower() | |
| 95 | + def isnumeric(self): return self.data.isnumeric() | |
| 96 | + def isspace(self): return self.data.isspace() | |
| 97 | + def istitle(self): return self.data.istitle() | |
| 98 | + def isupper(self): return self.data.isupper() | |
| 99 | + def join(self, seq): return self.data.join(seq) | |
| 100 | + def ljust(self, width, *args): | |
| 101 | + return self.__class__(self.data.ljust(width, *args)) | |
| 102 | + def lower(self): return self.__class__(self.data.lower()) | |
| 103 | + def lstrip(self, chars=None): return self.__class__(self.data.lstrip(chars)) | |
| 104 | + def partition(self, sep): | |
| 105 | + return self.data.partition(sep) | |
| 106 | + def replace(self, old, new, maxsplit=-1): | |
| 107 | + return self.__class__(self.data.replace(old, new, maxsplit)) | |
| 108 | + def rfind(self, sub, start=0, end=sys.maxint): | |
| 109 | + return self.data.rfind(sub, start, end) | |
| 110 | + def rindex(self, sub, start=0, end=sys.maxint): | |
| 111 | + return self.data.rindex(sub, start, end) | |
| 112 | + def rjust(self, width, *args): | |
| 113 | + return self.__class__(self.data.rjust(width, *args)) | |
| 114 | + def rpartition(self, sep): | |
| 115 | + return self.data.rpartition(sep) | |
| 116 | + def rstrip(self, chars=None): return self.__class__(self.data.rstrip(chars)) | |
| 117 | + def split(self, sep=None, maxsplit=-1): | |
| 118 | + return self.data.split(sep, maxsplit) | |
| 119 | + def rsplit(self, sep=None, maxsplit=-1): | |
| 120 | + return self.data.rsplit(sep, maxsplit) | |
| 121 | + def splitlines(self, keepends=0): return self.data.splitlines(keepends) | |
| 122 | + def startswith(self, prefix, start=0, end=sys.maxint): | |
| 123 | + return self.data.startswith(prefix, start, end) | |
| 124 | + def strip(self, chars=None): return self.__class__(self.data.strip(chars)) | |
| 125 | + def swapcase(self): return self.__class__(self.data.swapcase()) | |
| 126 | + def title(self): return self.__class__(self.data.title()) | |
| 127 | + def translate(self, *args): | |
| 128 | + return self.__class__(self.data.translate(*args)) | |
| 129 | + def upper(self): return self.__class__(self.data.upper()) | |
| 130 | + def zfill(self, width): return self.__class__(self.data.zfill(width)) | |
| 131 | + | |
| 132 | +class MutableString(UserString): | |
| 133 | + """mutable string objects | |
| 134 | + | |
| 135 | + Python strings are immutable objects. This has the advantage, that | |
| 136 | + strings may be used as dictionary keys. If this property isn't needed | |
| 137 | + and you insist on changing string values in place instead, you may cheat | |
| 138 | + and use MutableString. | |
| 139 | + | |
| 140 | + But the purpose of this class is an educational one: to prevent | |
| 141 | + people from inventing their own mutable string class derived | |
| 142 | + from UserString and than forget thereby to remove (override) the | |
| 143 | + __hash__ method inherited from UserString. This would lead to | |
| 144 | + errors that would be very hard to track down. | |
| 145 | + | |
| 146 | + A faster and better solution is to rewrite your program using lists.""" | |
| 147 | + def __init__(self, string=""): | |
| 148 | + self.data = string | |
| 149 | + def __hash__(self): | |
| 150 | + raise TypeError, "unhashable type (it is mutable)" | |
| 151 | + def __setitem__(self, index, sub): | |
| 152 | + if index < 0: | |
| 153 | + index += len(self.data) | |
| 154 | + if index < 0 or index >= len(self.data): raise IndexError | |
| 155 | + self.data = self.data[:index] + sub + self.data[index+1:] | |
| 156 | + def __delitem__(self, index): | |
| 157 | + if index < 0: | |
| 158 | + index += len(self.data) | |
| 159 | + if index < 0 or index >= len(self.data): raise IndexError | |
| 160 | + self.data = self.data[:index] + self.data[index+1:] | |
| 161 | + def __setslice__(self, start, end, sub): | |
| 162 | + start = max(start, 0); end = max(end, 0) | |
| 163 | + if isinstance(sub, UserString): | |
| 164 | + self.data = self.data[:start]+sub.data+self.data[end:] | |
| 165 | + elif isinstance(sub, basestring): | |
| 166 | + self.data = self.data[:start]+sub+self.data[end:] | |
| 167 | + else: | |
| 168 | + self.data = self.data[:start]+str(sub)+self.data[end:] | |
| 169 | + def __delslice__(self, start, end): | |
| 170 | + start = max(start, 0); end = max(end, 0) | |
| 171 | + self.data = self.data[:start] + self.data[end:] | |
| 172 | + def immutable(self): | |
| 173 | + return UserString(self.data) | |
| 174 | + def __iadd__(self, other): | |
| 175 | + if isinstance(other, UserString): | |
| 176 | + self.data += other.data | |
| 177 | + elif isinstance(other, basestring): | |
| 178 | + self.data += other | |
| 179 | + else: | |
| 180 | + self.data += str(other) | |
| 181 | + return self | |
| 182 | + def __imul__(self, n): | |
| 183 | + self.data *= n | |
| 184 | + return self | |
| 185 | + | |
| 186 | +if __name__ == "__main__": | |
| 187 | + # execute the regression test to stdout, if called as a script: | |
| 188 | + import os | |
| 189 | + called_in_dir, called_as = os.path.split(sys.argv[0]) | |
| 190 | + called_as, py = os.path.splitext(called_as) | |
| 191 | + if '-q' in sys.argv: | |
| 192 | + from test import test_support | |
| 193 | + test_support.verbose = 0 | |
| 194 | + __import__('test.test_' + called_as.lower()) | |