hash « string « Python Data Type Q&A

1. Is there a builtin "hash to string" in Perl?    stackoverflow.com

I'm coming to learn Perl from a Python background where the following hash-to-string conversion is built in to the language:

>>> d = {'a': 1, 'b': 2, 'c': 3}
>>> str(d)
"{'a': 1, 'c': ...

2. Hash method and UnicodeEncodeError    stackoverflow.com

In Python 2.5, I have the following hash function:

def __hash__(self):
  return hash(str(self))

3. Persistent Hashing of Strings in Python    stackoverflow.com

How would you convert an arbitrary string into a unique integer, which would be the same across Python sessions and platforms? For example hash('my string') wouldn't work because a different value ...

4. Efficiently generate a 16-character, alphanumeric string    stackoverflow.com

I'm looking for a very quick way to generate an alphanumeric unique id for a primary key in a table. Would something like this work?

def genKey():
    hash = hashlib.md5(RANDOM_NUMBER).digest().encode("base64")
 ...

5. Memory-efficient string-to-string map in Python (or C)    stackoverflow.com

I need a memory-efficient data structure for for storing about a million key--value pairs, where keys are strings of about 80 bytes, and values are strings of about 200 bytes, the ...

6. Hash+mapping or index+mapping to condense use of strings    stackoverflow.com

I have ~200K named properties and ~25K files. I extract whether the properties hold or not for each file using Python as a set of properties that hold, one set for ...

7. Is there a function that can turn a string into a hash?    stackoverflow.com

Ideally, 14 characters? Or, whatever works.

8. hash unicode string in python    stackoverflow.com

I try to hash some unicode strings:

hashlib.sha1(s).hexdigest()
UnicodeEncodeError: 'ascii' codec can't encode characters in position 0-81: 
ordinal not in range(128)

œ?¡™£¢?§¶•ªº–?œ?´®†¥¨ˆø?“‘åß?ƒ©???¬…æ??ç??˜µ??÷å??????????????????????????????????..?????????†???'‘“«««\dz?÷…•??l«??xcv?ƒm???!@#$©^&*(()––––––––––???????????????????•…÷?zdz?÷…•??l??•…÷?z?÷…•???•…??•…??•…??•…??•…??•…?•…?•…?•?…•÷?•…÷?•…÷?•…÷?•…÷?•…÷?•…÷?•…

9. fast, large-width, non-cryptographic string hashing in python    stackoverflow.com

I have a need for a high-performance string hashing function in python that produces integers with at least 34 bits of output (64 bits would make sense, but 32 is too ...

10. Python: Are `hash` values for built-in numeric types, strings standardised?    stackoverflow.com

I came to this question while pondering about the ordering of set, frozenset and dict. Python doesn't guarantee any ordering, and I guess any ordering is all down to the hash ...

11. ALGORITHM - String similarity score/hash    stackoverflow.com

Is there a method to calculate something like general "similarity score" of a string? In a way that I am not comparing two strings together but rather I get some number/scores ...

12. Hashing non-ascii Python string    stackoverflow.com

I'm trying to extract some string from a file using python re, then MD5ing this string using something like:

    #MD5er.py
    salt = extract_salt(file_foo)
    ...

13. String hash    python-forum.org

Hi, to write a function that would: take a string as parameter containing a hash (usually 16 random chars) that I would return a value between 0 and 1 (a float with at least two decimals) I would like to use all chars of the string and that * the function returns the same value if called with the same string ...