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Editorial Team
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Asked: 2026-05-22T18:01:50+00:00

The official Vim python interface documentation states, that modifying buffers with python is very

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The official Vim python interface documentation states, that modifying buffers with python is very simple, basically:

:py import vim
:py vim.current.buffer[0] = "Hello world"

However, python throws an exception, when I try to do that: 

Traceback (most recent call last):
  File "<string>", line 1, in <module>
TypeError: bad argument type for built-in operation

Read-only access (e.g. :py print vim.current.buffer[0] works just fine. Am I missing something here? Why can’t I modify vim buffers with python scripts?

[Note: I’m using recent Vim 7.3]

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1 Answer

  1. Editorial Team

    Works for me, “Hello World” is inserted in buffer. Is your vim compiled with +python

    I’m using version 7.3.162

    EDIT

    looking in the hg log for if_python.c I see a lot issues related to python, e.g. this one:

    changeset:   2641:b803b2776880
tag:         v7-3-062
user:        Bram Moolenaar <bram@vim.org>
date:        Tue Nov 16 19:26:02 2010 +0100
files:       src/auto/configure src/configure.in src/if_python.c src/if_python3.c src/version.c
description:
updated for version 7.3.062
Problem:    Python doesn't work properly when installed in another directory
        than expected.
Solution:   Figure out home directory in configure and use Py_SetPythonHome()
        at runtime. (Roland Puntaier)

    Which version are you on?

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