diff options
Diffstat (limited to 'Lib/string.py')
| -rw-r--r-- | Lib/string.py | 32 |
1 files changed, 23 insertions, 9 deletions
diff --git a/Lib/string.py b/Lib/string.py index edf24a4e2f..afa0787eca 100644 --- a/Lib/string.py +++ b/Lib/string.py @@ -254,23 +254,37 @@ def expandtabs(s, tabsize=8): return res + line # Character translation through look-up table. -def translate(s, table): - if type(table) != type('') or len(table) != 256: - raise TypeError, "translation table must be 256-char string" - res = "" - for c in s: - res = res + table[ord(c)] - return res +def translate(s, table, deletions=""): + if type(table) != type('') or len(table) != 256: + raise TypeError, "translation table must be 256 characters long" + res = "" + for c in s: + if c not in deletions: + res = res + table[ord(c)] + return res # Capitalize a string, e.g. "aBc dEf" -> "Abc def". def capitalize(s): - return upper(s[:1]) + lower(s[1:]) + return upper(s[:1]) + lower(s[1:]) # Capitalize the words in a string, e.g. " aBc dEf " -> "Abc Def". # See also regsub.capwords(). def capwords(s): - return join(map(capitalize, split(s))) + return join(map(capitalize, split(s))) +# Construct a translation string +_idmapL = None +def maketrans(fromstr, tostr): + if len(fromstr) != len(tostr): + raise ValueError, "maketrans arguments must have same length" + global _idmapL + if not _idmapL: + _idmapL = map(None, _idmap) + L = _idmapL[:] + fromstr = map(ord, fromstr) + for i in range(len(fromstr)): + L[fromstr[i]] = tostr[i] + return joinfields(L, "") # Try importing optional built-in module "strop" -- if it exists, # it redefines some string operations that are 100-1000 times faster. |