Incidentally, I used a local standalone version of Sunfounders filedb.py to come to above conclusions. It is copied below, in the hope that it may be able to help you to progress further.
and these are the two lines that I had to change to get this to run via systemctl, but this may not be exactly your problem of course!
CONFIG = ‘/home/astroberry/picar-x.conf’
config_flie = fileDB(config, 777, getpass.getuser())
#!/usr/bin/env python3
‘’’
‘’’
import os
from time import sleep
import getpass
class fileDB(object):
“”"A file based database.
A file based database, read and write arguements in the specific file.
"""
def __init__(self, db:str, mode:str=None, owner:str=None):
'''
Init the db_file is a file to save the datas.
:param db: the file to save the datas.
:type db: str
:param mode: the mode of the file.
:type mode: str
:param owner: the owner of the file.
:type owner: str
'''
self.db = db
# Check if db_file is existed, otherwise create one
if self.db != None:
self.file_check_create(db, mode, owner)
else:
raise ValueError('db: Missing file path parameter.')
def file_check_create(self, file_path:str, mode:str=None, owner:str=None):
"""
Check if file is existed, otherwise create one.
:param file_path: the file to check
:type file_path: str
:param mode: the mode of the file.
:type mode: str
:param owner: the owner of the file.
:type owner: str
"""
dir = file_path.rsplit('/',1)[0]
try:
if os.path.exists(file_path):
if not os.path.isfile(file_path):
print('Could not create file, there is a folder with the same name')
return
else:
if os.path.exists(dir):
if not os.path.isdir(dir):
print('Could not create directory, there is a file with the same name')
return
else:
os.makedirs(file_path.rsplit('/',1)[0], mode=0o754)
sleep(0.001)
with open(file_path, 'w') as f:
f.write("# robot-hat config and calibration value of robots\n\n")
if mode != None:
os.popen('sudo chmod %s %s'%(mode, file_path))
if owner != None:
os.popen('sudo chown -R %s:%s %s'%(owner, owner, file_path.rsplit('/',1)[0]))
except Exception as e:
raise(e)
def get(self, name, default_value=None):
"""
Get value with data's name
:param name: the name of the arguement
:type name: str
:param default_value: the default value of the arguement
:type default_value: str
:return: the value of the arguement
:rtype: str
"""
try:
conf = open(self.db,'r')
lines=conf.readlines()
conf.close()
file_len=len(lines)-1
flag = False
# Find the arguement and set the value
for i in range(file_len):
if lines[i][0] != '#':
if lines[i].split('=')[0].strip() == name:
value = lines[i].split('=')[1].replace(' ', '').strip()
flag = True
if flag:
return value
else:
return default_value
except FileNotFoundError:
conf = open(self.db,'w')
conf.write("")
conf.close()
return default_value
except :
return default_value
def set(self, name, value):
"""
Set value by with name. Or create one if the arguement does not exist
:param name: the name of the arguement
:type name: str
:param value: the value of the arguement
:type value: str
"""
# Read the file
conf = open(self.db,'r')
lines=conf.readlines()
conf.close()
file_len=len(lines)-1
flag = False
# Find the arguement and set the value
for i in range(file_len):
if lines[i][0] != '#':
if lines[i].split('=')[0].strip() == name:
lines[i] = '%s = %s\n' % (name, value)
flag = True
# If arguement does not exist, create one
if not flag:
lines.append('%s = %s\n\n' % (name, value))
# Save the file
conf = open(self.db,'w')
conf.writelines(lines)
conf.close()
#CONFIG = ‘/opt/picar-x/picar-x.conf’
CONFIG = ‘/home/astroberry/picar-x.conf’
config:str=CONFIG
--------- config_flie ---------
#config_flie = fileDB(config, 777, os.getlogin())
config_flie = fileDB(config, 777, getpass.getuser())
