Editing ini file using python "ConfigParser" will replace all ini entries to lower keys

Question

The code snippet below can edit an ini file, but will replace all ini entries to lower case:

config = ConfigParser.RawConfigParser()
config.read("test.ini")
config.set("GENERAL", "OptionEntry4", "100")
with open("test.ini", 'w') as configfile:
    config.write(configfile)

ini file before edit:

[GENERAL]
OptionEntry1 = 10
OptionEntry2 = 20
OptionEntry3 = 30
OptionEntry4 = 40
OptionEntry5 = 50

ini file after edit:

[GENERAL]
optionentry1 = 10
optionentry2 = 20
optionentry3 = 30
optionentry4 = 100
optionentry5 = 50

Answer 1

according to the documentation : "All option names are passed through the optionxform() method. Its default implementation converts option names to lower case."

config = ConfigParser.RawConfigParser()
config.optionxform = str

should fix it.

Answer 2

config = ConfigParser.RawConfigParser()
config.optionxform = str
config.read("test.ini")
config.set("GENERAL", "OptionEntry4", "100")
with open("test.ini", 'w') as configfile:
    config.write(configfile)

Read the doc: https://docs.python.org/2/library/configparser.html#ConfigParser.RawConfigParser.optionxform