1.0.0

First release.

Features

• CSV delimiter, line feed character, presence/absence of header, etc. are automatically determined (can be specified)
• Make a comparison after matching with the key columns
• You can specify columns that are not compared
• Differences can be displayed side-by-side (more suitable when the number of columns is small)
• Differences can be displayed in vertical order (more suitable when the number of columns is large)
• Differences are indicated by the following marks, which we call DIFF-MARK
  • !: There is a difference
  • <: Exists only on the left side
  • >: Exists only on the right side
• It is also possible to display only the number of differences and the line number with the difference
• It is possible to compare one file with commas and one file with tabs
• Low memory consumption
• Only Python standard modules are used and provided as a single file, so it is easy to install even on an isolated environment

Requirements

Runtime

• Python3.6 or later

CSV files

• Must be sorted by key columns

Installation

With pip

pip install git+https://github.com/blue-monk/csv-diff-python3

It may be safer to install it on a virtual environment created with venv.

Manual installation

Place csvdiff.py in any directory on the machine where Python 3 is installed.
It will be easier to use if you place it in a directory defined on PATH.

Run

If installed with pip

$ csvdiff3 -h

If installed manually

$ python csvdiff.py -h

or

$ chmod +x csvdiff.py
$ ./csvdiff.py -h