ds4se

Data Science for Software Engieering (ds4se) is an academic initiative to perform exploratory analysis on software engineering artifacts and metadata. Data Management, Analysis, and Benchmarking for DL and Traceability.

This file will become your README and also the index of your documentation.

Install

pip install ds4se

How to use

import ds4se.facade as facade

Traceability

To use the ds4se library to calculate trace link value of proposed trace link with given.

Supported technique model:
    VSM
    LDA
    orthogonal 
    LSA
    JS
    word2vec
    doc2vec

The function returns a tuple of two integers, with the first element as distance between two artifacts and the second element be the similarity between two artifacts, which is the traceability value.

facade.TraceLinkValue("source_string","target_string","LDA")

0.01

word2vec_metric is an optional parameter when using word2vec as technique, available metrics are:
WMD
SCM

Analysis

Usage of ds4se model to calculate the number of documents of either source or target class

The method takes in two parameters, a pandas dataframe for source artifacts and a pandas data frame for target artifacts, and it will do calculation for both classes.

The method returns a list of 4 integers:
1: number of documents for source artifacts;
2: number of documents for target artifacts;
3: source difference (difference between previous two results);
4: target difference (same as above, but opposite).

result = facade.NumDoc("source","target")
source_doc = result[0]
target_doc = result[1]
difference_source = result[2]
difference_target = result[3]
print("The number of documents for source is {} , with {} source difference".format(source_doc, difference_source))
print("The number of documents for target is {} , with {} target difference".format(target_doc, difference_target))

The number of documents for source is 160 , with 32 source difference
The number of documents for target is 128 , with -32 target difference

For all functions in analysis part, input should be pandas dataframe with following structure

d = {'contents': ["hello world", "this is a content of another file"]}
df = pd.DataFrame(data=d)
df

	contents
0	hello world
1	this is a content of another file

Usage of ds4se model to calculate the vocabulary size of either source or target class

The method takes in two parameters, source artifacts and target artifacts, and it will do calculation for both classes.

The method returns a list of 4 integers:
1: vocabulary size for source artifacts;
2: vocabulary size for target artifacts;
3: source difference;
4: target difference.

vocab_result = facade.VocabSize(source_df, target_df)
source = vocab_result[0]
target = vocab_result[1]
difference_source = vocab_result[2]
difference_target = vocab_result[3]
print("The vocabulary size for source is {} , with {} target difference".format(source, difference_source))
print("The vocabulary size for target is {} , with {} target difference".format(target, difference_target))

The vocabulary size for source is 179 , with 35 target difference
The vocabulary size for target is 144 , with -35 target difference

Usage of ds4se model to calculate the average number of token of either source or target class

The method takes in two parameters, source artifacts and target artifacts, and it will do calculation for both classes.

The method returns a list of 4 integers:
1: average number of token for source artifacts;
2: average number of token for target artifacts;
3: source difference;
4: target difference.

token_result = facade.AverageToken(source_df, target_df)
source = token_result[0]
target = token_result[1]
difference_source = vocab_result[2]
difference_target = vocab_result[3]
print("The number of average token for source is {} , with {} source difference".format(source, difference_source))
print("The number of average token for target is {} , with {} target difference".format(target, difference_target))

The number of average token for source is 107 , with 35 source difference
The number of average token for target is 143 , with -35 target difference

Usage of ds4se model to retriev term frequency

The method takes in two parameters, 
1: source artifacts,
2: target artifacts, 
and it will do calculation for both classes.

The method returns a dictonary with 
key: token
value: a list of count and frequency

facade.VocabShared(source_df,target_df)

{'est': [160, 0.16], 'http': [136, 0.136], 'frequnecy': [124, 0.124]}

If we only need the term frequency of one of two classes, we can use Vocab() function

The filename should be the path to the file

facade.Vocab(artifacts_df)

{'est': [141, 0.141], 'http': [136, 0.136], 'frequnecy': [156, 0.156]}

For Shared Metrics

Using the following metrics to compute using both source and target artifacts, use the following funtions.

They all require two parameters: source and target artifacts.

And return one int value

Shared vocabulary size

facade.SharedVocabSize(source_df, target_df)

112

Mutual information

facade.MutualInformation(source_df, target_df)

127

Corss Entropy

facade.CrossEntropy(source_df, target_df)

171

KL Divergence

facade.KLDivergence(source_df, target_df)

152