How to concatenate strings in a list into a long path in Python

Today the internship company assigned a data processing task. When concatenating the strings in the list into a long path, I encountered the following problem:

import os

path_list = ['first_directory', 'second_directory', 'file.txt']print os.path.join(path_list)

 After discovering os.path.join, it is still a list of strings. I was puzzled by this:

['first_directory', 'second_directory', 'file.txt']

 After thinking about it carefully, I figured out that the input of os.path.join must be one or more strs, not a list. The essence of a string list is still a list. The instruction understands the string list as a str, which is equivalent to performing os.path.join on a single str. Of course, there is no change in the end.

  So I modified the code:

import os

path_list = ['first_directory', 'second_directory', 'file.txt']# print os.path.join(path_list)head = ''for path in path_list:
    head = os.path.join(head, path)print head

  Finally the strings in the list were concatenated into a complete long path: ## #

first_directory/second_directory/file.txt

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