qsv 0.3.1

A tool designed for rapid CSV file processing and filtering, specifically designed for log analysis.

Quilter-CSV

A tool provides elastic and rapid filtering for efficient analysis of huge CSV files like eventlogs.

[!NOTE]
This project is in the early stages of development. Please be aware that frequent changes and updates are likely to occur.

Description

Archtecture

This tool processes csv(comma-separated values) file by connecting three processes: initializer, chainable functions, and finalizer.
For example, you can load a csv file in the initializer, use a chainable functions to filter, sort, and select columns, and then output the resulting csv file in the finalizer.

$ qsv {{INITIALIZER}} {{Arguments}} - {{CHAINABLE}} {{Arguments}} - {{FINALIZER}} {{Arguments}}

Each process must be explicitly separated by a “-”.

Usage

e.g. Below is an example of reading a CSV file, extracting rows that contain 4624 in the EventID column, and displaying the top 3 rows them sorted by the Timestamp column.

$ qsv load Security.csv - isin 'Event ID' 4624 - sort 'Date and Time' - head 3
shape: (3, 5)
┌─────────────┬───────────────────────┬─────────────────────────────────┬──────────┬───────────────┐
│ Level       ┆ Date and Time         ┆ Source                          ┆ Event ID ┆ Task Category │
│ ---         ┆ ---                   ┆ ---                             ┆ ---      ┆ ---           │
│ str         ┆ str                   ┆ str                             ┆ i64      ┆ str           │
╞═════════════╪═══════════════════════╪═════════════════════════════════╪══════════╪═══════════════╡
│ Information ┆ 10/6/2016 01:00:55 PM ┆ Microsoft-Windows-Security-Aud… ┆ 4624     ┆ Logon         │
│ Information ┆ 10/6/2016 01:04:05 PM ┆ Microsoft-Windows-Security-Aud… ┆ 4624     ┆ Logon         │
│ Information ┆ 10/6/2016 01:04:10 PM ┆ Microsoft-Windows-Security-Aud… ┆ 4624     ┆ Logon         │
└─────────────┴───────────────────────┴─────────────────────────────────┴──────────┴───────────────┘

Initializers

load

Loads the specified CSV files.

Arguments:
  path*: str

examples

$ qsv load ./Security.csv

$ qsv load ./logs/*.csv

Chainable Functions

select

Filter only on the specified columns.

Arguments:
  colnames: Union[str, tuple[str]]

examples

$ qsv load ./Security.csv - select 'Event ID'

$ qsv load ./Security.csv - select "Date and Time-Event ID"

$ qsv load ./Security.csv - select "'Date and Time,Event ID'"

isin

Filter rows containing the specified values.

Arguments:
  colname: str
  values: list

examples

$ qsv load ./Security.csv - isin 'Event ID' 4624,4634

contains

Filter rows containing the specified regex.

Arguments:
  colname: str
  regex: str

examples

$ qsv load ./Security.csv - contains 'Date and Time' '10/6/2016'

head

Filters only the specified number of lines from the first line.

Options:
  number: int = 5

examples

$ qsv load ./Security.csv - head 10

tail

Filters only the specified number of lines from the last line.

Options:
  number: int = 5

examples

$ qsv load ./Security.csv - tail 10

sort

Sorts all rows by the specified column values.

Arguments:
  colnames: Union[str, tuple[str]]

Options:
  desc: bool = False

examples

$ qsv load ./Security.csv - sort 'Date and Time'

sort

Remove duplicated rows by the specified column names.

Arguments:
  colnames: Union[str, list[str]]

examples

$ qsv load ./Security.csv - uniq 'Event ID'

changetz

Changes the timezone of the specified date column.

Arguments:
  colname: str

Options:
  timezone_from: str = "UTC"
  timezone_to: str = "Asia/Tokyo"
  datetime_format: str = None

examples

$ qsv load ./Security.csv - changetz 'Date and Time' --timezone_from=UTC --timezone_to=Asia/Tokyo --new_colname='Date and Time(JST)'

Finalizer

headers

Displays the column names of the data.

Options:
  plain: bool = False

examples

$ qsv load ./Security.csv - headers
┏━━━━┳━━━━━━━━━━━━━━━┓
┃ #  ┃ Column Name   ┃
┡━━━━╇━━━━━━━━━━━━━━━┩
│ 00 │ Level         │
│ 01 │ Date and Time │
│ 02 │ Source        │
│ 03 │ Event ID      │
│ 04 │ Task Category │
└────┴───────────────┘

stats

Displays the statistical information of the data.

examples

$ qsv load ./Security.csv - stats
shape: (9, 6)
┌────────────┬─────────────┬───────────────────────┬─────────────────────────────────┬─────────────┬─────────────────────────┐
│ statistic  ┆ Level       ┆ Date and Time         ┆ Source                          ┆ Event ID    ┆ Task Category           │
│ ---        ┆ ---         ┆ ---                   ┆ ---                             ┆ ---         ┆ ---                     │
│ str        ┆ str         ┆ str                   ┆ str                             ┆ f64         ┆ str                     │
╞════════════╪═════════════╪═══════════════════════╪═════════════════════════════════╪═════════════╪═════════════════════════╡
│ count      ┆ 62031       ┆ 62031                 ┆ 62031                           ┆ 62031.0     ┆ 62031                   │
│ null_count ┆ 0           ┆ 0                     ┆ 0                               ┆ 0.0         ┆ 0                       │
│ mean       ┆ null        ┆ null                  ┆ null                            ┆ 5058.625897 ┆ null                    │
│ std        ┆ null        ┆ null                  ┆ null                            ┆ 199.775419  ┆ null                    │
│ min        ┆ Information ┆ 10/6/2016 01:00:35 PM ┆ Microsoft-Windows-Eventlog      ┆ 1102.0      ┆ Credential Validation   │
│ 25%        ┆ null        ┆ null                  ┆ null                            ┆ 5152.0      ┆ null                    │
│ 50%        ┆ null        ┆ null                  ┆ null                            ┆ 5156.0      ┆ null                    │
│ 75%        ┆ null        ┆ null                  ┆ null                            ┆ 5157.0      ┆ null                    │
│ max        ┆ Information ┆ 10/7/2016 12:59:59 AM ┆ Microsoft-Windows-Security-Aud… ┆ 5158.0      ┆ User Account Management │
└────────────┴─────────────┴───────────────────────┴─────────────────────────────────┴─────────────┴─────────────────────────┘

showquery

Displays the data processing query.

examples

qsv load Security.csv - showquery
naive plan: (run LazyFrame.explain(optimized=True) to see the optimized plan)

  Csv SCAN Security.csv
  PROJECT */5 COLUMNS

show

Outputs the processing results to the standard output.

examples

$ qsv load Security.csv - show
Level,Date and Time,Source,Event ID,Task Category
Information,10/7/2016 06:38:24 PM,Microsoft-Windows-Security-Auditing,4658,File System
Information,10/7/2016 06:38:24 PM,Microsoft-Windows-Security-Auditing,4656,File System
Information,10/7/2016 06:38:24 PM,Microsoft-Windows-Security-Auditing,4658,File System
Information,10/7/2016 06:38:24 PM,Microsoft-Windows-Security-Auditing,4656,File System
Information,10/7/2016 06:38:24 PM,Microsoft-Windows-Security-Auditing,4658,File System

showtable

Outputs the processing results table to the standard output.

examples

$ qsv load Security.csv - showtable
shape: (3, 5)
┌─────────────┬───────────────────────┬─────────────────────────────────┬──────────┬───────────────┐
│ Level       ┆ Date and Time         ┆ Source                          ┆ Event ID ┆ Task Category │
│ ---         ┆ ---                   ┆ ---                             ┆ ---      ┆ ---           │
│ str         ┆ str                   ┆ str                             ┆ i64      ┆ str           │
╞═════════════╪═══════════════════════╪═════════════════════════════════╪══════════╪═══════════════╡
│ Information ┆ 10/6/2016 01:00:55 PM ┆ Microsoft-Windows-Security-Aud… ┆ 4624     ┆ Logon         │
│ Information ┆ 10/6/2016 01:04:05 PM ┆ Microsoft-Windows-Security-Aud… ┆ 4624     ┆ Logon         │
│ Information ┆ 10/6/2016 01:04:10 PM ┆ Microsoft-Windows-Security-Aud… ┆ 4624     ┆ Logon         │
└─────────────┴───────────────────────┴─────────────────────────────────┴──────────┴───────────────┘

dump

Outputs the processing results to a CSV file.

Options:
  path: str = yyyymmdd-HHMMSS_{QUERY}.csv

examples

$ qsv load Security.csv - dump ./Security-qsv.csv

Quilt

Quilt is a command that pre-defines a series of the above Initializer - Chainable Functions - Finalizer processes in a yaml rule and executes them all at once.

e.g

$ qsv quilt rules ./Security.csv

rules/test.yaml

title: test
description: test filter
version: 0.1.0
author: John Doe <[e-mail]>
rules:
  load: 
  isin:
    colname: EventId
    values:
      - 4624
  head:
    number: 5
  select:
    colnames:
      - RecordNumber
      - TimeCreated
  changetz:
    colname: TimeCreated
    timezone_from: UTC
    timezone_to: Asia/Tokyo
    datetime_format: "%Y-%m-%d %H:%M:%S%.f"
  showtable:

Planned Features:

• CSV cache (.pkl, duckdb, etc.)
• Filtering based on specific conditions (OR, AND conditions)
• Grouping for operations like count
• Joining with other tables

Installation

from PyPI

$ pip install qsv

from GitHub Releases

The version compiled into a binary using Nuitka is also available for use.

Ubuntu

$ chmod +x ./qsv
$ ./qsv {{options...}}

Windows

> qsv.exe {{options...}}

License

Quilter-csv is released under the MIT License.