Connecting Progress database using Linux ODBC drivers from P

I have downloaded and installed the PROGRESS_DATADIRECT_ODBC_OE_LINUX_64.tar.Z on my linux server with the help of documentation. I have created the odbc.ini file and exported it as mentioned in the documentation.

odbc.ini:

[ODBC Data Sources]
PROGRESSDB = PROGRESSDB Server

IANAAppCodePage=4
InstallDir=/localhome/USER1/Progress/DataDirect/Connect64_for_ODBC_71
Trace=0
TraceFile=odbctrace.out
TraceDll=/localhome/USER1/Progress/DataDirect/Connect64_for_ODBC_71/lib/ddtrc27.so

[PROGRESSDB]
Driver=/localhome/USER1/Progress/DataDirect/Connect64_for_ODBC_71/lib/ddoe27.so
ApplicationUsingThreads=1
AlternateServers=
ArraySize=50
ConnectionRetryCount=0
ConnectionRetryDelay=3
Database=DBNAME
DefaultIsolationLevel=1
DefaultLongDataBuffLen=2048
EnableTimestampWithTimezone=1
EncryptionMethod=0
FailoverMode=0
FailoverGranularity=0
FailoverPreconnect=0
HostName=PROGRESSDBSERVER
HostNameInCertificate=
LoadBalancing=0
LoadBalanceTimeout=0
LoginTimeout=15
LogonID=dbuser
Password=dbpwd
PortNumber=2501
QueryTimeout=0
ReportCodePageConversionErrors=0
StaticCursorLongColBuffLen=4096
TrustStore=
TrustStorePassword=
UseWideCharacterTypes=0
ValidateServerCertificate=1

When I ran the 

ODBCINI= /localhome/USER1/Progress/DataDirect/Connect64_for_ODBC_71/odbc.ini; export ODBCINI

I got below messages:

/localhome/USER1/Progress/DataDirect/Connect64_for_ODBC_71/odbc.ini: line 1: [ODBC: command not found
/localhome/USER1/Progress/DataDirect/Connect64_for_ODBC_71/odbc.ini: line 2: PROGRESSDB: command not found
/localhome/USER1/Progress/DataDirect/Connect64_for_ODBC_71/odbc.ini: line 8: [PROGRESSDB]: command not found

So I am not sure whether export command executed successfully or not.

Then I tried my sample python code:

#!/usr/bin/python3

import pypyodbc as pyodbc

cnxn = pyodbc.connect('DSN=PROGRESSDB;UID=dbuser;PWD=dbpwd')
cursor = cnxn.cursor()
cursor.execute("select Username from PUB.Client")
rows = cursor.fetchall()
for row in rows:
   print(row.Username)

But I am getting below error:

File "/usr/lib/python3.4/site-packages/pypyodbc.py", line 2434, in __init__
self.connect(connectString, autocommit, ansi, timeout, unicode_results, readonly)
File "/usr/lib/python3.4/site-packages/pypyodbc.py", line 2483, in connect
check_success(self, ret)
File "/usr/lib/python3.4/site-packages/pypyodbc.py", line 988, in check_success
ctrl_err(SQL_HANDLE_DBC, ODBC_obj.dbc_h, ret, ODBC_obj.ansi)
File "/usr/lib/python3.4/site-packages/pypyodbc.py", line 964, in ctrl_err
raise Error(state,err_text)
pypyodbc.Error: ('IM002', '[IM002] [unixODBC][Driver Manager]Data source name not found, and no default driver specified')

Kindly suggest if I am missing anything....

Thanks in advance.