Renaming characters in multiple files in a folder-CodePudding

I'm trying to rename files in a folder with import os. Folder

I want to replace the 'SN' in all these files with 'NG'.

I have tried with the code `

filenames = os.listdir(serial_dir) #serial_dir is the right path
for filename in filenames:
            dst = filename.replace('SN', 'NG')
            os.rename(filename, dst)

` I have tested by printing out "filenames" and get the return:

['SN0000244,calibrationCheck1.txt', 'SN0000244,calibrationCheck2.txt', 'SN0000244,CurrentCalibration1.csv', 'SN0000244,CurrentCalibration2.csv', 'SN0000244,CurrentCalibrationFit1.csv', 'SN0000244,CurrentCalibrationFit2.csv', 'SN0000244.txt']

But i get the error: can only concatenate str (not "int") to str

Thanks.

I tried searching stackoverflow for answers but got nothing.

CodePudding user response：

os.rename looks for files in the current directory, not in the directory you specified. You should add the directory path before the file name.

serial_dir = 'path/to/dir'
filenames = os.listdir(serial_dir)
for filename in filenames:
    dst = filename.replace('SN', 'NG')
    os.rename(f'{serial_dir}/{filename}', f'{serial_dir}/{dst}')