Hello I want to know how to create a file if it does not exist in direcotry. I want only to append data.
I am getting this error in Python No such file or directory.
This is my code:
with open (saveAddr+".csv",'a') as allpckts: writer = csv.DictWriter(allpckts, delimiter=',', fieldnames=header) if pktnum<2: writer.writerow(dict((fn,fn) for fn in header)) writer.writerow(packet_data) else: writer.writerow(packet_data)
My problem was that I wasn’t in right directory. So for anyone searching for the most basic syntax to only append to CSV file is:
with open (filename".csv",'a') as filedata: writer = csv.DictWriter(filedata, delimiter=',', fieldnames=header) writer.writerow(data)
Most probably you are trying to create a file in a directory which does not exist .
What you want is what ‘a’ mode does , it creates the file if it does not exist , otherwise it appends to the file . But it would not create the directories , if those directories so not exist , you should create the directories used in saveAddr , before running the program .
If you want a programmatic solution , you can check out os.mkdir , which should create the directory.