我如何告诉 python 移动到目录中的下一个文件？

Question

How do I move to the next file in Python after checking that the file extension is correct and parsing it in element tree? See code below. After the file is checked for .bpmn and parsed I would like to move to the next file and check if it is an .xml and then parse.

path = 'path_to_directory'
for filename in os.listdir(path):
    if filename.endswith(".bpmn"):
        fullname = os.path.join(path, filename)
        tree = ET.parse(fullname)
        root = tree.getroot()

     else:
         print("must end with .bpmn")

    if filename.endswith(".xml"):
        fullname = os.path.join(path, filename)
        treeXML = ET.parse(fullname)
        rootXML = treeXML.getroot()
     else:
        print("must end with xml")

Answer 1

for loops does it for you and continue bypass it. The continue statement in Python returns the control to the beginning of the while loop. The continue statement rejects all the remaining statements in the current iteration of the loop and moves the control back to the top of the loop.

The continue statement can be used in both while and for loops. for filename in os.listdir(path):

so filename keep changing after loop get executed. try this. use continue path = 'path_to_directory'

for filename in os.listdir(path):
    if filename.endswith(".bpmn"):
        fullname = os.path.join(path, filename)
        tree = ET.parse(fullname)
        root = tree.getroot()
        continue
     else:
         print("must end with .bpmn")

    if filename.endswith(".xml"):
        fullname = os.path.join(path, filename)
        treeXML = ET.parse(fullname)
        rootXML = treeXML.getroot()
        continue
     else:
        print("must end with xml")

continue

import os, sys

# Open a file
path = "/var/www/html/"
dirs = os.listdir( path )

# This would print all the files and directories
for file in dirs:
   print file