How would you translate this from Perl to Python?

Question

I\'ve got a Perl function which takes a timestamp and returns either the unchanged timestamp (if it\'s never seen it before) or otherwise, it appends some letters to make it uni

Answer 1

The class is generic and boring, but This is my very first recursive generator. <3

def stamptag():
    yield ''
    prefixtag = stamptag()
    prefix = prefixtag.next()
    while True:
        for i in range(ord('A'),ord('Z')+1):
            yield prefix+chr(i)
        prefix = prefixtag.next()

tagger = stamptag()
for i in range(3000):
    tagger.next()
print tagger.next()

class uniquestamp:
    def __init__(self):
        self.timestamp = -1
        self.tagger = stamptag()

    def format(self,newstamp):
        if self.timestamp < newstamp:
            self.tagger = stamptag()
            self.timestamp = newstamp
        return str(newstamp)+self.tagger.next()

stamper = uniquestamp()
print map(stamper.format, [1,1,1,2,2,3,4,4])

output:

DKJ
['1', '1A', '1B', '2', '2A', '3', '4', '4A']

Answer 2

Quite similar to Ali A, but I'll post mine anyway:

class unique_timestamp:
    suffixes = " ABCDEFGHIJKLMNOPQRSTUVWXYZ"
    def __init__(self):
        self.previous_timestamps = {}
        pass
    def uniquify(self, timestamp):
        times_seen_before = self.previous_timestamps.get(timestamp, 0)
        self.previous_timestamps[timestamp] = times_seen_before + 1
        if times_seen_before > 0:
            return str(timestamp) + self.suffixes[times_seen_before]
        else:
            return str(timestamp)

Usage:

>>> u = unique_timestamp()
>>> u.uniquify(1)
'1'
>>> u.uniquify(1)
'1A'
>>> u.uniquify(1)
'1B'
>>> u.uniquify(2)
'2'