# this program writes the tags present in a DICOM file to a text file. Repeats for all DICOMs in that folder.
# 2020-09-01-0859
import codecs
import sys
from pathlib import Path
import glob
import pydicom
from pydicom.filereader import dcmread
import os
sys.stdout = codecs.getwriter('utf-8')(sys.stdout.buffer)

CWD = os.getcwd()

with open ('list_of_tags.txt', 'w+',encoding='utf-8') as txtfile:
        #file_root = 'your path'
        #file_root = 'your path'
        file_root = CWD
        dcm_path = file_root+'/*.dcm'
        

        for filename in glob.glob(dcm_path):
            try:
                dataset = dcmread(filename)
                file_lst = filename.split('\\')
                txtfile.write(file_lst[-1] + "---------------------------------------------------------\n") #writes filename and visible separator to text file
                for me in dataset.file_meta: # gets meta tags (read-only)
                    dataset.file_meta.me = '00'
                    txtfile.write("     " + str(me) + '\n')
                for de in dataset:
                        line = str(de)
                        filePlusline = file_lst[-1] + " " + line
                        linelst = filePlusline.split()
                        wanted_txt = str(linelst)
                        txtfile.write("     "+ line + "\n") # writes the individual tag with 5 preceding spaces
                        #txtfile.write("     "+file_list[-1] + " " + line + "\n") # use this line instead of the previous line if you want the file name before each tag
                #txtfile.write("\n") #creates a blank line between files
                print("{} completed".format(file_lst[-1]))
            except:
                print("\n*****\nERROR: {}\n*****\n".format(filename))