diff options
Diffstat (limited to 'Demo/classes')
| -rwxr-xr-x | Demo/classes/Complex.py | 32 | ||||
| -rwxr-xr-x | Demo/classes/Dbm.py | 4 | ||||
| -rw-r--r-- | Demo/classes/README | 2 | ||||
| -rwxr-xr-x | Demo/classes/Range.py | 5 | ||||
| -rwxr-xr-x | Demo/classes/Rat.py | 11 | ||||
| -rwxr-xr-x | Demo/classes/Rev.py | 2 | ||||
| -rwxr-xr-x | Demo/classes/Vec.py | 5 | ||||
| -rwxr-xr-x | Demo/classes/bitvec.py | 39 |
8 files changed, 51 insertions, 49 deletions
diff --git a/Demo/classes/Complex.py b/Demo/classes/Complex.py index 5880c64..b7ba2e0 100755 --- a/Demo/classes/Complex.py +++ b/Demo/classes/Complex.py @@ -4,16 +4,21 @@ from math import sqrt -def complex(re, im): - return Complex().init(re, im) +class complex: - -class Complex: - - def init(self, re, im): + def __init__(self, re, im): self.re = float(re) self.im = float(im) - return self + + def __coerce__(self, other): + if type(other) == type(self): + if other.__class__ == self.__class__: + return self, other + else: + raise TypeError, 'cannot coerce to complex' + else: + # The cast to float() may raise an exception! + return self, complex(float(other), 0.0) def __repr__(self): return 'complex' + `self.re, self.im` @@ -60,9 +65,16 @@ class Complex: def test(): a = complex(2, 0) b = complex(3, 4) - print a, b - print a+b, a-b, a*b, a/b - print b+a, b-a, b*a, b/a + print a + print b + print a+b + print a-b + print a*b + print a/b + print b+a + print b-a + print b*a + print b/a i = complex(0, 1) print i, i*i, i*i*i, i*i*i*i j = complex(1, 1) diff --git a/Demo/classes/Dbm.py b/Demo/classes/Dbm.py index 0bd5491..8d7fe0f 100755 --- a/Demo/classes/Dbm.py +++ b/Demo/classes/Dbm.py @@ -41,11 +41,11 @@ class Dbm: def test(): - d = Dbm('@dbm', 'rw', 0666) + d = Dbm('@dbm', 'rw', 0600) print d while 1: try: - key = eval(raw_input('key: ')) + key = input('key: ') if d.has_key(key): value = d[key] print 'currently:', value diff --git a/Demo/classes/README b/Demo/classes/README index f821f78..cca7524 100644 --- a/Demo/classes/README +++ b/Demo/classes/README @@ -1,4 +1,4 @@ -Examples of classes that implement special operators (see class.doc): +Examples of classes that implement special operators (see reference manual): Complex.py Complex numbers Dates.py Date manipulation package by Tim Peters diff --git a/Demo/classes/Range.py b/Demo/classes/Range.py index b8bc9be..e7b6be2 100755 --- a/Demo/classes/Range.py +++ b/Demo/classes/Range.py @@ -16,7 +16,7 @@ def range(*a): start, stop, step = a else: raise TypeError, 'range() needs 1-3 arguments' - return Range().init(start, stop, step) + return Range(start, stop, step) # Class implementing a range object. @@ -26,14 +26,13 @@ def range(*a): class Range: # initialization -- should be called only by range() above - def init(self, start, stop, step): + def __init__(self, start, stop, step): if step == 0: raise ValueError, 'range() called with zero step' self.start = start self.stop = stop self.step = step self.len = max(0, int((self.stop - self.start) / self.step)) - return self # implement `x` and is also used by print x def __repr__(self): diff --git a/Demo/classes/Rat.py b/Demo/classes/Rat.py index 0d3e515..d10e4df 100755 --- a/Demo/classes/Rat.py +++ b/Demo/classes/Rat.py @@ -2,7 +2,7 @@ def rat(num, den): - return Rat().init(num, den) + return Rat(num, den) def gcd(a, b): @@ -13,13 +13,12 @@ def gcd(a, b): class Rat: - def init(self, num, den): + def __init__(self, num, den): if den == 0: raise ZeroDivisionError, 'rat(x, 0)' g = gcd(num, den) self.num = num/g self.den = den/g - return self def __repr__(self): return 'rat' + `self.num, self.den` @@ -49,8 +48,10 @@ class Rat: return a, rat(b, 1L) if t == type(0.0): return a.__float__(), b + if t == type(a) and a.__class__ == b.__class__: + return a, b raise TypeError, 'Rat.__coerce__: bad other arg' - + def __add__(a, b): if type(b) <> type(a): a, b = a.__coerce__(b) @@ -93,4 +94,4 @@ def test(): except ZeroDivisionError: print 'OK' -#test() +test() diff --git a/Demo/classes/Rev.py b/Demo/classes/Rev.py index 5cf4602..c1874c6 100755 --- a/Demo/classes/Rev.py +++ b/Demo/classes/Rev.py @@ -8,7 +8,7 @@ # ... # !dlroW olleH # -# The .forw is so you can use anonymous sequences in init, and still +# The .forw is so you can use anonymous sequences in __init__, and still # keep a reference the forward sequence. ) # If you give it a non-anonymous mutable sequence, the reverse sequence # will track the updated values. ( but not reassignment! - another diff --git a/Demo/classes/Vec.py b/Demo/classes/Vec.py index 6e2bc47..8289bc8 100755 --- a/Demo/classes/Vec.py +++ b/Demo/classes/Vec.py @@ -2,16 +2,15 @@ def vec(*v): - return apply(Vec().init, v) + return apply(Vec, v) class Vec: - def init(self, *v): + def __init__(self, *v): self.v = [] for x in v: self.v.append(x) - return self def fromlist(self, v): diff --git a/Demo/classes/bitvec.py b/Demo/classes/bitvec.py index 40cd13f..69718d7 100755 --- a/Demo/classes/bitvec.py +++ b/Demo/classes/bitvec.py @@ -48,7 +48,7 @@ def _check_slice(len, i, j): class BitVec: - def init(self, *params): + def __init__(self, *params): self._data = 0L self._len = 0 if not len(params): @@ -93,20 +93,12 @@ class BitVec: else: raise error, 'bitvec() requires 0 -- 2 parameter(s)' - return self - - - def _init(self, data, len): - self._data = data - self._len = len - return self - def append(self, item): #_check_value(item) #self[self._len:self._len] = [item] self[self._len:self._len] = \ - BitVec()._init(long(not not item), 1) + BitVec(long(not not item), 1) def count(self, value): @@ -138,7 +130,7 @@ class BitVec: def insert(self, index, item): #_check_value(item) #self[index:index] = [item] - self[index:index] = BitVec()._init(long(not not item), 1) + self[index:index] = BitVec(long(not not item), 1) def remove(self, value): @@ -163,7 +155,7 @@ class BitVec: def copy(self): - return BitVec()._init(self._data, self._len) + return BitVec(self._data, self._len) def seq(self): @@ -229,7 +221,7 @@ class BitVec: #rprt(`self`+'.__getslice__'+`i, j`+'\n') i, j = _check_slice(self._len, i, j) if i >= j: - return BitVec()._init(0L, 0) + return BitVec(0L, 0) if i: ndata = self._data >> i else: @@ -239,7 +231,7 @@ class BitVec: #we'll have to invent faster variants here #e.g. mod_2exp ndata = ndata & ((1L << nlength) - 1) - return BitVec()._init(ndata, nlength) + return BitVec(ndata, nlength) def __setslice__(self, i, j, sequence, *rest): #rprt(`self`+'.__setslice__'+`(i, j, sequence) + rest`+'\n') @@ -274,16 +266,16 @@ class BitVec: if type(multiplier) != type(0): raise TypeError, 'sequence subscript not int' if multiplier <= 0: - return BitVec()._init(0L, 0) + return BitVec(0L, 0) elif multiplier == 1: return self.copy() #handle special cases all 0 or all 1... if self._data == 0L: - return BitVec()._init(0L, self._len * multiplier) + return BitVec(0L, self._len * multiplier) elif (~self)._data == 0L: - return ~BitVec()._init(0L, self._len * multiplier) + return ~BitVec(0L, self._len * multiplier) #otherwise el cheapo again... - retval = BitVec()._init(0L, 0) + retval = BitVec(0L, 0) while multiplier: retval, multiplier = retval + self, multiplier - 1 return retval @@ -293,7 +285,7 @@ class BitVec: if type(otherseq) != type(self): otherseq = apply(bitvec, (otherseq, ) + rest) #sequence is now of our own type - return BitVec()._init(self._data & otherseq._data, \ + return BitVec(self._data & otherseq._data, \ min(self._len, otherseq._len)) @@ -302,7 +294,7 @@ class BitVec: if type(otherseq) != type(self): otherseq = apply(bitvec, (otherseq, ) + rest) #sequence is now of our own type - return BitVec()._init(self._data ^ otherseq._data, \ + return BitVec(self._data ^ otherseq._data, \ max(self._len, otherseq._len)) @@ -311,13 +303,13 @@ class BitVec: if type(otherseq) != type(self): otherseq = apply(bitvec, (otherseq, ) + rest) #sequence is now of our own type - return BitVec()._init(self._data | otherseq._data, \ + return BitVec(self._data | otherseq._data, \ max(self._len, otherseq._len)) def __invert__(self): #rprt(`self`+'.__invert__()\n') - return BitVec()._init(~self._data & ((1L << self._len) - 1), \ + return BitVec(~self._data & ((1L << self._len) - 1), \ self._len) def __coerce__(self, otherseq, *rest): @@ -337,5 +329,4 @@ class BitVec: return float(self._data) -def bitvec(params): - return apply(BitVec().init, params) +bitvec = BitVec |