你想要的模式是： / p>

  with open（'ICP_all.txt'，'w'）as SeznamICP_all：
 for root，dirs，files in os.walk（目录）：
文件中的文件：
 if（file.endswith（'。 xml'））
 xmldoc = minidom.parse（os.path.join（root，file））
 itemlist = xmldoc.getElementsByTagName（'is'）
 SeznamICP_all.write（itemlist [ 0] .attributes ['icp']。value +'\\\
'）
 

在每次迭代的为循环，根指的是文件和 dirs 存在。

I am new to Python, yet I have some experience with Delphi. I am trying to make a script that would be able to search all xml files in directory (including all subdirectories in that directory), then parse those XML and save some data (numbers) from there to a simple txt file. After that I work through that txt file to create another txt file with only unique set of numbers from previously created txt file.

I created this script:

import os
from xml.dom import minidom

#for testing purposes
directory = os.getcwd()

print("Procházím aktuální adresář, hledám XML soubory...")
print("Procházím XML soubory, hledám IČP provádějícího...")

with open ('ICP_all.txt', 'w') as SeznamICP_all:   
    for root, dirs, files in os.walk(directory):
        for file in files:
            if (file.endswith('.xml')):
                xmldoc = minidom.parse(file)
                itemlist = xmldoc.getElementsByTagName('is')
                SeznamICP_all.write(itemlist[0].attributes['icp'].value + '\n')

print("Vytvářím list unikátních IČP...")

with open ('ICP_distinct.txt','w') as distinct:
    UnikatniICP = []
    with open ('ICP_all.txt','r') as SeznamICP_all:
        for line in SeznamICP_all:
            if line not in UnikatniICP:
                UnikatniICP.append(line)
                distinct.write(line)

print('Počet unikátních IČP:' + str(len(UnikatniICP)))
input('Pro ukončení stiskni libovolnou klávesu...')

It works as intented just until there is a subdirectory, in that case I get error:

FileNotFoundError: [Errno 2] No such file or directory: 'RNN38987.xml'

That is caused by the fact that file is in subdirectory, not in a directory with python script. I tried to make it work via path to get absolute path of the file to work with, but I am getting more error, see the script:

import os
from xml.dom import minidom
from pathlib import Path

#for testing purposes
directory = os.getcwd()

print("Procházím aktuální adresář, hledám XML soubory...")
print("Procházím XML soubory, hledám IČP provádějícího...")

with open ('ICP_all.txt', 'w') as SeznamICP_all:   
    for root, dirs, files in os.walk(directory):
        for file in files:
            if (file.endswith('.xml')):
                soubor = Path(file).resolve()
                print(soubor)
                xmldoc = minidom.parse(soubor)
                itemlist = xmldoc.getElementsByTagName('is')
                SeznamICP_all.write(itemlist[0].attributes['icp'].value + '\n')

print("Vytvářím list unikátních IČP...")

with open ('ICP_distinct.txt','w') as distinct:
    UnikatniICP = []
    with open ('ICP_all.txt','r') as SeznamICP_all:
        for line in SeznamICP_all:
            if line not in UnikatniICP:
                UnikatniICP.append(line)
                distinct.write(line)

print('Počet unikátních IČP:' + str(len(UnikatniICP)))
input('Pro ukončení stiskni libovolnou klávesu...')

The error I am getting now I don't really understand and google is not helping either - whole log:

Procházím aktuální adresář, hledám XML soubory...
Procházím XML soubory, hledám IČP provádějícího...
C:\2_Programming\Python\IČP FINDER\src\20150225_1815_2561_1.xml
Traceback (most recent call last):
  File "C:\2_Programming\Python\IČP FINDER\src\ICP Finder.py", line 17, in <module>
    xmldoc = minidom.parse(soubor)
  File "C:\2_Programming\Python\Interpreter\lib\xml\dom\minidom.py", line 1958, in parse
    return expatbuilder.parse(file)
  File "C:\2_Programming\Python\Interpreter\lib\xml\dom\expatbuilder.py", line 913, in parse
    result = builder.parseFile(file)
  File "C:\2_Programming\Python\Interpreter\lib\xml\dom\expatbuilder.py", line 204, in parseFile
    buffer = file.read(16*1024)
AttributeError: 'WindowsPath' object has no attribute 'read'

Can you please help me out?

The pattern you are looking for is like:

with open ('ICP_all.txt', 'w') as SeznamICP_all:   
    for root, dirs, files in os.walk(directory):
        for file in files:
            if (file.endswith('.xml')):
                xmldoc = minidom.parse(os.path.join(root, file))
                itemlist = xmldoc.getElementsByTagName('is')
                SeznamICP_all.write(itemlist[0].attributes['icp'].value + '\n')

In each iteration of your for loop, root refers to the directory in which the files and dirs exist.