From cd1909dc2662718394f8982a8742ee1e78f6126e Mon Sep 17 00:00:00 2001
From: midichef <67946319+midichef@users.noreply.github.com>
Date: Mon, 13 Jan 2025 15:20:12 -0800
Subject: [PATCH] [loaders-] use empty str for null_value in fixed width sheet

---
 visidata/loaders/fixed_width.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/visidata/loaders/fixed_width.py b/visidata/loaders/fixed_width.py
index 6f74fb1ef..418791ed2 100644
--- a/visidata/loaders/fixed_width.py
+++ b/visidata/loaders/fixed_width.py
@@ -110,3 +110,5 @@ def save_fixed(vd, p, *vsheets):
                     for col, val in dispvals.items():
                         fp.write(('{0:%s%s.%s} ' % ('>' if vd.isNumeric(col) else '<', widths[col], widths[col])).format(val))
                     fp.write('\n')
+
+FixedWidthColumnsSheet.options.null_value = ''    # the file format cannot contain None, so use empty string instead