configparser module, when use text file to show following error

[mbilalshafiq]

import configparser

config = configparser.ConfigParser()
#config.read("E:\\My Folders\\Alnafi\\AlNafi\\configparser_Ex3.ini") # when we use .ini file then out put is ok
config.read_file("E:\\My Folders\\Alnafi\\AlNafi\\configparser_Ex3.txt")
config.sections()

Error:
MissingSectionHeaderError: File contains no section headers.
file: '<???>', line: 1
'E'

-----------

[Gribouillis]

A configparser file normally needs a section header

Output:
[mysection]
foo = bar

[mbilalshafiq]

#Thanks your reply
#this is my .txt file using in configparser module

[rootdirectory]
root_directory = e:\alnafi
[username]
user_name = m.bilal
[databaseconnected]
database_connected = True
[summaryunit]
summary_unit = False

Error:
  File "C:\Users\Lenovo\Anaconda3\lib\configparser.py", line 1079, in _read
    raise MissingSectionHeaderError(fpname, lineno, line)

MissingSectionHeaderError: File contains no section headers.
file: '<???>', line: 1
'E'

[mbilalshafiq]

A configparser file normally needs a section header

Output:
[mysection]
foo = bar

#after added your section but still same issue.
[mysection]
foo = bar
[rootdirectory]
root_directory = e:\alnafi
[username]
user_name = m.bilal
[databaseconnected]
database_connected = True
[summaryunit]
summary_unit = False

Error:
MissingSectionHeaderError: File contains no section headers.
file: '<string>', line: 1
'E:\\My Folders\\Alnafi\\AlNafi\\configparser_Ex3.txt'

[Gribouillis]

You are using a wrong signature for ConfigParser.read_file(). This method expects an iterable of strings such as an open file. Replace config.read_file() with config.read().

[mbilalshafiq]

You are using a wrong signature for ConfigParser.read_file(). This method expects an iterable of strings such as an open file. Replace config.read_file() with config.read().

Thanks your guidance, now is working fine...