Is it possible to read the configuration for ConfigParser from a string or list?
Without any kind of temporary file on a filesystem
OR
Is there any similar solution for this?
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3 Answers
You could use a buffer which behaves like a file: Python 3 solution
import configparser import io s_config = """ [example] is_real: False """ buf = io.StringIO(s_config) config = configparser.ConfigParser() config.read_file(buf) print(config.getboolean('example', 'is_real')) In Python 2.7, this implementation was correct:
import ConfigParser import StringIO s_config = """ [example] is_real: False """ buf = StringIO.StringIO(s_config) config = ConfigParser.ConfigParser() config.readfp(buf) print config.getboolean('example', 'is_real') 
4 Comments
Lucas
well where to use the buffer? ConfigParser.Read() excepts a file name.
lanzz
cStringIO objects are not buffers. Strings are buffers, but buffers cannot be used where file-like objects are required; cStringIO wraps a buffer in order to make it behave like a file. Besides, your example does not demonstrate how a cStringIO behaves like a file; getvalue is a method specific to cStringIO instances, but files don't have it.
Noel Evans
@Lucas I've posted a complete example that takes a StringIO buffer and gets a sample value
mindthief
The question was tagged as python-2.7 but just for the sake of completeness: Since 3.2 you can use the ConfigParser function read_string() so you don't need the StringIO method anymore.
import configparser s_config = """ [example] is_real: False """ config = configparser.ConfigParser() config.read_string(s_config) print(config.getboolean('example', 'is_real')) 
2 Comments
Nick T
1 more reason I hate working with Python 2.7 still (thanks RHEL 7)
RCross
To be fair to RHEL7, it's perfectly possibly to install Python 3.x. developers.redhat.com/blog/2018/08/13/install-python3-rhel
Python has read_string and read_dict since version 3.2. It does not support reading from lists.
The example shows reading from a dictionary. Keys are section names, values are dictionaries with keys and values that should be present in the section.
#!/usr/bin/env python3 import configparser cfg_data = { 'mysql': {'host': 'localhost', 'user': 'user7', 'passwd': 's$cret', 'db': 'ydb'} } config = configparser.ConfigParser() config.read_dict(cfg_data) host = config['mysql']['host'] user = config['mysql']['user'] passwd = config['mysql']['passwd'] db = config['mysql']['db'] print(f'Host: {host}') print(f'User: {user}') print(f'Password: {passwd}') print(f'Database: {db}') 