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Showing posts with the label Hash

Why Hash Function On Two Different Objects Return Same Value?

I used Spyder, run Python 2.7. Just found interesting things: hash(-1) and hash(-2) both return -2… Read more Why Hash Function On Two Different Objects Return Same Value?

Verifying Password Hashes Generated By Python Passlib

I have a need to verify password hashes generated using python passlib. My objective is to use pass… Read more Verifying Password Hashes Generated By Python Passlib

Python. Identity In Sets Of Objects. And Hashing

How do __hash__ and __eq__ use in identification in sets? For example some code that should help to… Read more Python. Identity In Sets Of Objects. And Hashing

Extract Hash Seed In Unit Testing

I need to get the random hash seed used by python to replicate failing unittests. If PYTHONHASHSEED… Read more Extract Hash Seed In Unit Testing

Hashing An Immutable Dictionary In Python

Short version: What's the best hashing algorithm for a multiset implemented as a dictionary of… Read more Hashing An Immutable Dictionary In Python

Is There Any Hash Function Which Have Following Properties

I want a hash function which is fast, collision resistant and can give unique output. The primary r… Read more Is There Any Hash Function Which Have Following Properties

Why Does Tuple(set([1,"a","b","c","z","f"])) == Tuple(set(["a","b","c","z","f",1])) 85% Of The Time With Hash Randomization Enabled?

Given Zero Piraeus' answer to another question, we have that x = tuple(set([1, 'a', … Read more Why Does Tuple(set([1,"a","b","c","z","f"])) == Tuple(set(["a","b","c","z","f",1])) 85% Of The Time With Hash Randomization Enabled?

How Is Hash(none) Calculated?

On my machine, hash(None) returns a value: >>> hash(None) -2138947203 Just out of curiosi… Read more How Is Hash(none) Calculated?

Multilevel Dictionary In Python

I would like to create a perl style multilevel dict in python however I'm struggling to get thi… Read more Multilevel Dictionary In Python

Ruby Hash Equivalent To Python Dict Setdefault

In Python it is possible to read a dictionary/hash key while at the same time setting the key to a … Read more Ruby Hash Equivalent To Python Dict Setdefault

What Makes Lists Unhashable?

So lists are unhashable: >>> { [1,2]:3 } TypeError: unhashable type: 'list' The f… Read more What Makes Lists Unhashable?

Why Doesn't Python Hash Function Give The Same Values When Run On Android Implementation?

I believed that hash() function works the same in all python interpreters. But it differs when I ru… Read more Why Doesn't Python Hash Function Give The Same Values When Run On Android Implementation?

Python Portable Hash

I am reading the source code of pyspark here. I got really confused by the portable function here. … Read more Python Portable Hash

What Hashing Function Does Spark Use For Hashingtf And How Do I Duplicate It?

Spark MLLIb has a HashingTF() function that computes document term frequencies based on a hashed va… Read more What Hashing Function Does Spark Use For Hashingtf And How Do I Duplicate It?

What Is Feature Hashing (hashing-trick)?

I know feature hashing (hashing-trick) is used to reduce the dimensionality and handle sparsity of … Read more What Is Feature Hashing (hashing-trick)?

Python Hash Not Being Updated In Csv File Output

I have working code that takes a directory of csv files and hashes one column of each line, then ag… Read more Python Hash Not Being Updated In Csv File Output

Scala MurmurHash3 Library Not Matching Python Mmh3 Library

I have a need to MurmurHash strings in both Python and Scala. However they are giving very differen… Read more Scala MurmurHash3 Library Not Matching Python Mmh3 Library