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summary hashilib digest encryption There are only two kinds of hash digest (encryption) algorithms: md5 and sha-x series Characteristics of hash encryption The digest generated by hash algorithm is irreversible. (the original text cannot be obtained through encrypted text)Only the same data can be summarized by the same algorithmNo matter h ...

Create a class. A class corresponds to a table in a database, and the data attributes of the class correspond to the field names in the table. This class is called mapping class. 1, Proactively create mappings Classes mapped using the Declarative system are defined according to the base class. In other words, each mapped class needs to inhe ...

Data pre filling has its own characteristics, and redundant and invalid data need to be pre selected according to different data formats. Data preprocessing is roughly divided into three steps: data preparation, data conversion and data output. Data processing is not only the basic link of system engineering, but also an effective means to impr ...

1, Operator 1.1 + -- addition of two objects +Operator is used to add two objects. [example 1] number addition. In Python, we often use + to add values. Common applications are as follows: a = 13 b = 2 c = 4.0 d = 5.0 print(a + b) # Add integers 15 print(c + d) # Floating point number addition 9.0 print(a + c) # Add integer and float ...

imgaug is a encapsulated python library for image authentication. It supports the transformation of key points and bounding box together. Project home page: imgaug doc 1. Installation and uninstallation # Install via github sudo pip install git+https://github.com/aleju/imgaug # Install via pypi sudo pip install imgaug # For local install ...

Exploratory Data Analysis EDA (Exploratory Data Analysis) analysis with python   show holy respect to python community, for there dedication and wisdom   Dataset related: First, UCL wine dataset: UCI data set is a commonly used standard test data set for machine learning. It is a database for machine learning proposed by the University of ...

Many articles can't be updated to CSDN, and can be concerned about my official account number (programmer sailing). 1. Summary When analyzing malicious code, we often encounter the situation that there is no import function in the import table when statically Analyzing Malicious Code. This situation is usually that malicious code confused t ...

Neither class attributes nor class methods can be used directly outside the class like ordinary variables or functions. We can regard the class as an independent space, then the class attribute is actually a variable defined in the class body, and the class method is a function defined in the class body. As mentioned in the previous chapter, in ...

Introduction to particle swarm optimization 03: with Matlab and python code (PSO) VIII: Inertia weight w reflects the ability of particles to inherit the previous velocity. Shi Y first introduced inertia weight w into PSO algorithm, and analyzed and pointed out that a larger inertia weight value is conducive to global search, while a smaller ...

1. Trial matrix A = [ 1 2 ...