Mercurial > cpython-lru_cache-weakref

annotate Lib/UserString.py @ 12369:68e48bb94071 legacy-trunk

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Marc-Andre Lemburg: The maxsplit functionality in .splitlines() was replaced by the keepends functionality which allows keeping the line end markers together with the string.
author Guido van Rossum <guido@python.org>
date Tue, 11 Apr 2000 15:38:46 +0000
parents a216fe79ae00
children e44ca61db715
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
12214
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
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1 #!/usr/bin/env python
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
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2 ## vim:ts=4:et:nowrap
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
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3 """A user-defined wrapper around string objects
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
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4
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
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5 Note: string objects have grown methods in Python 1.6
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
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6 This module requires Python 1.6 or later.
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
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7 """
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
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8 from types import StringType, UnicodeType
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9 import sys
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
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10
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
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11 class UserString:
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
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12 def __init__(self, seq):
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13 if isinstance(seq, StringType) or isinstance(seq, UnicodeType):
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14 self.data = seq
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
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15 elif isinstance(seq, UserString):
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
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16 self.data = seq.data[:]
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17 else:
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18 self.data = str(seq)
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19 def __str__(self): return str(self.data)
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20 def __repr__(self): return repr(self.data)
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21 def __int__(self): return int(self.data)
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22 def __long__(self): return long(self.data)
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23 def __float__(self): return float(self.data)
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24 def __complex__(self): return complex(self.data)
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25 def __hash__(self): return hash(self.data)
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26
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27 def __cmp__(self, string):
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28 if isinstance(string, UserString):
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29 return cmp(self.data, string.data)
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30 else:
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31 return cmp(self.data, string)
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32 def __contains__(self, char):
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33 return char in self.data
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34
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35 def __len__(self): return len(self.data)
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36 def __getitem__(self, index): return self.__class__(self.data[index])
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37 def __getslice__(self, start, end):
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38 start = max(start, 0); end = max(end, 0)
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39 return self.__class__(self.data[start:end])
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40
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41 def __add__(self, other):
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42 if isinstance(other, UserString):
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43 return self.__class__(self.data + other.data)
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44 elif isinstance(other, StringType) or isinstance(other, UnicodeType):
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45 return self.__class__(self.data + other)
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46 else:
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47 return self.__class__(self.data + str(other))
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48 def __radd__(self, other):
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49 if isinstance(other, StringType) or isinstance(other, UnicodeType):
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50 return self.__class__(other + self.data)
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51 else:
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52 return self.__class__(str(other) + self.data)
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53 def __mul__(self, n):
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54 return self.__class__(self.data*n)
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55 __rmul__ = __mul__
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56
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
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57 # the following methods are defined in alphabetical order:
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58 def capitalize(self): return self.__class__(self.data.capitalize())
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59 def center(self, width): return self.__class__(self.data.center(width))
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60 def count(self, sub, start=0, end=sys.maxint):
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
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61 return self.data.count(sub, start, end)
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62 def encode(self, encoding=None, errors=None): # XXX improve this?
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
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63 if encoding:
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64 if errors:
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65 return self.__class__(self.data.encode(encoding, errors))
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66 else:
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67 return self.__class__(self.data.encode(encoding))
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68 else:
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69 return self.__class__(self.data.encode())
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70 def endswith(self, suffix, start=0, end=sys.maxint):
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71 return self.data.endswith(suffix, start, end)
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72 def expandtabs(self, tabsize=8):
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73 return self.__class__(self.data.expandtabs(tabsize))
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74 def find(self, sub, start=0, end=sys.maxint):
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
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75 return self.data.find(sub, start, end)
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76 def index(self, sub, start=0, end=sys.maxint):
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
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77 return self.data.index(sub, start, end)
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78 def isdecimal(self): return self.data.isdecimal()
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79 def isdigit(self): return self.data.isdigit()
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80 def islower(self): return self.data.islower()
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81 def isnumeric(self): return self.data.isnumeric()
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82 def isspace(self): return self.data.isspace()
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83 def istitle(self): return self.data.istitle()
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84 def isupper(self): return self.data.isupper()
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85 def join(self, seq): return self.data.join(seq)
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86 def ljust(self, width): return self.__class__(self.data.ljust(width))
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
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87 def lower(self): return self.__class__(self.data.lower())
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88 def lstrip(self): return self.__class__(self.data.lstrip())
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89 def replace(self, old, new, maxsplit=-1):
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90 return self.__class__(self.data.replace(old, new, maxsplit))
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91 def rfind(self, sub, start=0, end=sys.maxint):
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92 return self.data.rfind(sub, start, end)
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93 def rindex(self, sub, start=0, end=sys.maxint):
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94 return self.data.rindex(sub, start, end)
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95 def rjust(self, width): return self.__class__(self.data.rjust(width))
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96 def rstrip(self): return self.__class__(self.data.rstrip())
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97 def split(self, sep=None, maxsplit=-1):
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98 return self.data.split(sep, maxsplit)
12369
68e48bb94071 Marc-Andre Lemburg:
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99 def splitlines(self, keepends=0): return self.data.splitlines(keepends)
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100 def startswith(self, prefix, start=0, end=sys.maxint):
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101 return self.data.startswith(prefix, start, end)
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102 def strip(self): return self.__class__(self.data.strip())
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103 def swapcase(self): return self.__class__(self.data.swapcase())
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104 def title(self): return self.__class__(self.data.title())
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105 def translate(self, table, deletechars=""):
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106 return self.__class__(self.data.translate(table, deletechars))
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107 def upper(self): return self.__class__(self.data.upper())
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108
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
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109 class MutableString(UserString):
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110 """mutable string objects
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111
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112 Python strings are immutable objects. This has the advantage, that
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113 strings may be used as dictionary keys. If this property isn't needed
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114 and you insist on changing string values in place instead, you may cheat
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115 and use MutableString.
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116
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117 But the purpose of this class is an educational one: to prevent
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
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118 people from inventing their own mutable string class derived
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119 from UserString and than forget thereby to remove (override) the
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
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120 __hash__ method inherited from ^UserString. This would lead to
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
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121 errors that would be very hard to track down.
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122
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
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123 A faster and better solution is to rewrite your program using lists."""
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124 def __init__(self, string=""):
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125 self.data = string
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126 def __hash__(self):
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127 raise TypeError, "unhashable type (it is mutable)"
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
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128 def __setitem__(self, index, sub):
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
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129 if index < 0 or index >= len(self.data): raise IndexError
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
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130 self.data = self.data[:index] + sub + self.data[index+1:]
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
Fred Drake <fdrake@acm.org>
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131 def __delitem__(self, index):
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
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132 if index < 0 or index >= len(self.data): raise IndexError
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
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133 self.data = self.data[:index] + self.data[index+1:]
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
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134 def __setslice__(self, start, end, sub):
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
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135 start = max(start, 0); end = max(end, 0)
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
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136 if isinstance(sub, UserString):
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
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137 self.data = self.data[:start]+sub.data+self.data[end:]
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
Fred Drake <fdrake@acm.org>
parents:
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138 elif isinstance(sub, StringType) or isinstance(sub, UnicodeType):
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
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139 self.data = self.data[:start]+sub+self.data[end:]
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
Fred Drake <fdrake@acm.org>
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140 else:
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
Fred Drake <fdrake@acm.org>
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141 self.data = self.data[:start]+str(sub)+self.data[end:]
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
Fred Drake <fdrake@acm.org>
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142 def __delslice__(self, start, end):
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
Fred Drake <fdrake@acm.org>
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143 start = max(start, 0); end = max(end, 0)
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
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144 self.data = self.data[:start] + self.data[end:]
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
Fred Drake <fdrake@acm.org>
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145 def immutable(self):
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
Fred Drake <fdrake@acm.org>
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146 return UserString(self.data)
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
Fred Drake <fdrake@acm.org>
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147
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
Fred Drake <fdrake@acm.org>
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148 if __name__ == "__main__":
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
Fred Drake <fdrake@acm.org>
parents:
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149 # execute the regression test to stdout, if called as a script:
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
Fred Drake <fdrake@acm.org>
parents:
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150 import os
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
Fred Drake <fdrake@acm.org>
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151 called_in_dir, called_as = os.path.split(sys.argv[0])
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
Fred Drake <fdrake@acm.org>
parents:
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152 called_in_dir = os.path.abspath(called_in_dir)
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
Fred Drake <fdrake@acm.org>
parents:
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153 called_as, py = os.path.splitext(called_as)
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
Fred Drake <fdrake@acm.org>
parents:
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154 sys.path.append(os.path.join(called_in_dir, 'test'))
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
Fred Drake <fdrake@acm.org>
parents:
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155 if '-q' in sys.argv:
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
Fred Drake <fdrake@acm.org>
parents:
diff changeset
156 import test_support
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
Fred Drake <fdrake@acm.org>
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157 test_support.verbose = 0
a216fe79ae00 UserString class from Peter Funk <pf@artcom-gmbh.de>.
Fred Drake <fdrake@acm.org>
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158 __import__('test_' + called_as.lower())