ftp a tar file using python - python-2.7

Question

I am trying to copy a file from remote server to my local machine using FTP and i have written a python script for it.:
import os
from ftplib import FTP
btsIp=raw_input("Enter the IP:")
try:
ftp=FTP(btsIp,user='',passwd='',timeout=20)
except :
print("FTP Connection failed")
sys.exit(1)
ftp.cwd('/store/slv_imt')
filenames=ftp.nlst()
for eachFile in filenames:
localName=os.path.join('D:\Users\shaik-s\Documents\SLV_logs',eachFile)
file=open(localName,'w')
ftp.retrbinary('RETR' + eachFile,file.write)
file.close()
ftp.quit()
However, i am getting error, as command not understood:
slv_imt_2016-07-13__00-00-34.tar
Traceback (most recent call last):
File "C:/Python27/Scripts/ftp.py", line 16, in <module>
ftp.retrbinary('RETR' + eachFile,file.write)
File "C:\Python27\lib\ftplib.py", line 414, in retrbinary
conn = self.transfercmd(cmd, rest)
File "C:\Python27\lib\ftplib.py", line 376, in transfercmd
return self.ntransfercmd(cmd, rest)[0]
File "C:\Python27\lib\ftplib.py", line 339, in ntransfercmd
resp = self.sendcmd(cmd)
File "C:\Python27\lib\ftplib.py", line 249, in sendcmd
return self.getresp()
File "C:\Python27\lib\ftplib.py", line 224, in getresp
raise error_perm, resp
error_perm: 500 'RETRSLV_IMT_2016-07-13__00-00-34.TAR': command not understood.
Kindly help..

Answer 1

To fix the error, you need to add a space between "RETR" and "eachFile".
ftp.retrbinary('RETR %s'%eachFile, file.write)
But your code shows that you may encounter another problem, try to use the following cmd.
file = open(localName, 'wb')