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¶ ObjImportApi for Log Files
The ObjImportApi class in ObjDataImportLog.py is a specialized tool for importing and parsing log files. It is designed to handle specific log formats, such as Apache error logs, by extending the ObjData.ObjData class.
¶ Key Features
- Log Format Specificity: Tailored to parse log files where entries are enclosed in brackets (
[]). - Structured Data Extraction: Capable of splitting log lines into meaningful segments, such as timestamps and event details.
- Date and Time Parsing: Automatically converts timestamp strings from the log into
datetimeobjects.
¶ Methods
¶ __init__(self, DB=0)
Initializes the ObjImportApi object, inheriting from ObjData.ObjData.
¶ DetectSeparator(self, Filename)
Identifies the separator used in the log file. For the current implementation, it assumes that log entries are separated by brackets ([]) and returns [ as the primary separator.
¶ PrepFile(self, Filename)
Prepares the log file for import. This method returns the filename without any modifications.
¶ OpenFile(self, Filename)
Opens the specified log file for reading. It determines the delimiter and prepares the file for line-by-line processing.
¶ CloseFile(self)
Closes the log file that is currently open.
¶ ColumnList(self)
Returns a list of column names based on the log file type, which is specified by self._Sheetname. For example, for an apache_error log, it returns ["event_date", "event_type", "pid", "event_note"].
¶ NextRow(self)
Reads the next line from the log file and parses it into a structured row. It splits the line by the detected separator, cleans up the segments, and converts the timestamp into a datetime object. If the end of the file is reached, it returns 'EOF'.
¶ Usage Example
# Create an instance of the importer
log_importer = ObjImportApi()
# Specify the log type
log_importer._Sheetname = "apache_error"
# Open a log file
log_importer.OpenFile("error.log")
# Get the column list
columns = log_importer.ColumnList()
print("Columns:", columns)
# Process rows
while True:
row = log_importer.NextRow()
if row == 'EOF':
break
print("Log entry:", row)
# Close the file
log_importer.CloseFile()
¶ Cyclomatic complexity
A quantitative measure of the number of linearly independent
paths through a program's source code.
M 62:4 ObjImportApi.NextRow - B
M 52:4 ObjImportApi.ColumnList - A
C 28:0 ObjImportApi - A
M 40:4 ObjImportApi.OpenFile - A
M 30:4 ObjImportApi.__init__ - A
M 33:4 ObjImportApi.DetectSeparator - A
M 37:4 ObjImportApi.PrepFile - A
M 49:4 ObjImportApi.CloseFile - A
¶ Halstead metrics
Halstead’s goal was to identify measurable properties of software, and the
relations between them. These numbers are statically computed from the source code
η1 = the number of distinct operators
η2 = the number of distinct operands
N1 = the total number of operators
N2 = the total number of operands
h1: 3
h2: 12
N1: 7
N2: 12
vocabulary: 15
length: 19
calculated_length: 47.77443751081735
volume: 74.23092131656186
difficulty: 1.5
effort: 111.34638197484279
time: 6.185910109713488
bugs: 0.024743640438853954
¶ Maintainability Index
Maintainability Index is a software metric which measures how maintainable
factory.import/ObjDataImportLog.py - A
Updated : 2025-11-26