catalogue

1) Module installation and import

2)os.getcwd()

3)os.listdir(path)

4)os.walk(path)

5)os.path.exists(path)

6)os.mkdir(path)

7)os.rmdir(path)

8)os.path.join(path1,path2)

9)os.path.split(path)

10)os.path.dirname(path)

11)os.path.basename(path)

12)os.path.isdir(path)

13)os.path.isfile(path)

14)os.path.getsize(path)

The os module is Python It is the most commonly used module to sort out files and directories in. This module provides a very rich method to deal with files and directories. Next, I will summarize some methods commonly used in my work and hope to grow with you.

1) Module installation and import

# Import
import os

2)os.getcwd()

• Function: obtain the current working path;

3)os.listdir(path)

• Function: pass in any path and return a list of all files and directories under the path;

path = r"C:\Users\Desktop\publish\os modular\test_os modular"
os.listdir(path)

4)os.walk(path)

• Meaning: pass in any path path, deeply traverse all subfolders under the specified path, and return a tuple composed of path, folder list and file list. The way I write in my code belongs to tuple unpacking;
• Tuple unpacking: assign each value in a tuple to different variables;

path = r"C:\Users\Desktop\publish\os modular\test_os modular"
for path,dirs,files in os.walk(path):
    #Output absolute path
    print(path)
    #folder
    print(dirs)
    #Files in folders
    print(files)
    print("\n")

5)os.path.exists(path)

• Meaning: pass in a path path to judge whether the directory under the specified path exists. Returns True if it exists; otherwise, returns False;

path1 = 'C:\Users\Desktop\publish\os modular\huang_wei'

if os.path.exists(path1):
    print("The specified folder does not exist")
else:
    print("The specified folder does not exist")

6)os.mkdir(path)

• Meaning: pass in a path path to create a single-layer (single) folder;
• Note: if the folder already exists, an error will be reported. Therefore, before creating a folder, you need to use OS path. The exists (path) function determines whether the folder exists;

os.getcwd()
path1 = os.getcwd()+"\\huang_wei"
os.mkdir(path1)

7)os.rmdir(path)

• Meaning: pass in a path and delete the folder under the specified path;
• Note: this method can only delete empty folders. Deleting non empty folders will report an error;

path1 = os.getcwd()+"\\huang_wei"
os.rmdir(path1)
----------------------------------
path2 = os.getcwd()+"\\a\\b\\c"
os.rmdir(path2) 

8)os.path.join(path1,path2)

• Meaning: pass in two path paths and splice the paths to form a new complete path;

path = os.getcwd()
lis = ["a.jpg","b.jpg","c.jpg"]
for i in lis:
    x = os.path.join(path,i)
    print(x)

9)os.path.split(path)

• Meaning: pass in a complete path and split it into absolute path and file name {2 parts;

path1 = r"C:\Users\Huang Wei\Desktop\publish\os modular\a.jpg"
os.path.split(path1)

10)os.path.dirname(path)

• Meaning: pass in a complete file path and only get its absolute path;

path1 = r"C:\Users\Desktop\publish\os modular\a.jpg"
os.path.dirname(path1)
#The output result is: C:\Users\Desktop\publish\os module

11)os.path.basename(path)

• Meaning: pass in a complete file path and only get its file name;

path1 = r"C:\Users\Desktop\publish\os modular\a.jpg"
os.path.basename(path1)
#The output result is: a.jpg

12)os.path.isdir(path)

• Meaning: pass in a complete file path to judge whether it is a folder;

path = os.getcwd()
file_list = os.listdir()
for file in file_list:
    if os.path.isdir(file):
        print(file)

13)os.path.isfile(path)

• Meaning: pass in a complete file path to judge whether it is a file;

path = os.getcwd()
file_list = os.listdir()
for file in file_list:
    if os.path.isfile(file):
        print(file)

14)os.path.getsize(path)

• Meaning: pass in a complete file path and return the size of the file;

os.path.getsize("Compressed package I created.zip")