Description
Pandas version checks
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I have checked that this issue has not already been reported.
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I have confirmed this bug exists on the latest version of pandas.
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I have confirmed this bug exists on the main branch of pandas.
Reproducible Example
# ----------------------------------
### imports
import pandas as pd
import decimal as dc
# ----------------------------------
### definitions
value_str = '2.445'
# ----------------------------------
### initialization
df_float = pd.DataFrame(data=[float(value_str)])
df_decimal = pd.DataFrame(data=[dc.Decimal(value_str)])
# ----------------------------------
### exports
# excel
df_float.to_excel('float.xlsx')
df_decimal.to_excel('decimal.xlsx')
Issue Description
The code writes value to float.xlsx as number, but it is written as string in decimal.xlsx.
I identified that in the condition here
pandas/pandas/io/excel/_base.py
Line 1367 in d56f6e2
This same issue was already raised, but it was closed with no solution (by error?) #26277
Expected Behavior
Values in both dataframes should be written to excel as number.
Installed Versions
INSTALLED VERSIONS
commit : 91111fd
python : 3.9.13.final.0
python-bits : 64
OS : Linux
OS-release : 6.0.5-200.fc36.x86_64
Version : #1 SMP PREEMPT_DYNAMIC Wed Oct 26 15:55:21 UTC 2022
machine : x86_64
processor : x86_64
byteorder : little
LC_ALL : None
LANG : en_GB.UTF-8
LOCALE : en_GB.UTF-8
pandas : 1.5.1
numpy : 1.23.4
pytz : 2022.6
dateutil : 2.8.2
setuptools : 65.5.1
pip : 22.3.1
Cython : None
pytest : None
hypothesis : None
sphinx : None
blosc : None
feather : None
xlsxwriter : None
lxml.etree : None
html5lib : None
pymysql : None
psycopg2 : None
jinja2 : None
IPython : None
pandas_datareader: None
bs4 : None
bottleneck : None
brotli : None
fastparquet : None
fsspec : None
gcsfs : None
matplotlib : None
numba : None
numexpr : None
odfpy : None
openpyxl : 3.0.10
pandas_gbq : None
pyarrow : None
pyreadstat : None
pyxlsb : None
s3fs : None
scipy : None
snappy : None
sqlalchemy : None
tables : None
tabulate : None
xarray : None
xlrd : None
xlwt : None
zstandard : None
tzdata : None