[Python] Making a backup file + appending date time + moving file if the file exists. PYTHON

I have a few of the pieces of this working but I'm struggling with putting them together.

I would like to take a file, move it to a backup folder, get the date time from that file, and append it to the file's name / change the file's name to file name + date time.

This part gets the date time in the format I want it. (print line is the date time formatted properly, but I don't need to print this line)

Filepath = "C:\\SyncWork\\ACE\\Files\\ESAL_P\\ESAL_P.txt"
modifiedTime = os.path.getmtime(Filepath)
firstFile = os.path.getmtime(Filepath)

print (datetime.fromtimestamp(modifiedTime).strftime("%b-%d-%y-%H:%M:%S"))


This part will rename / move the file (But it's missing the datetime)

prevName = 'c:\\syncwork\\ace\\files\\ESAL_P\\ESAL_P.txt'
newName = 'c:\\syncwork\\ace\\files\\ESAL_P\\Backup\\ESAL_P.txt'

os.rename(prevName, newName)


How do I turn the print line with the formatting that I like into a string and append it to the end of the newName line?

AFTER my question was answered My final code looked like this:

Filepath = "C:\\SyncWork\\ACE\\Files\\ESAL_P\\ESAL_P.txt"
modifiedTime = os.path.getmtime(Filepath)



timestamp = datetime.fromtimestamp(modifiedTime).strftime("%b-%d-%Y_%H.%M.%S")

prevName = 'c:\\SyncWork\\ACE\\Files\\ESAL_P\\ESAL_P.txt'
newName = 'c:\\SyncWork\\ACE\\Files\\ESAL_P\\Backup\\ESAL_P'

os.rename(prevName, newName+"_"+timestamp + ".txt")
print(newName)

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