s3namic 0.0.2

A Python package for managing AWS S3 bucket

Installation

pip install s3namic

---

Import module

from s3namic import s3namic
s3 = s3namic(
  bucket="bucket_name",
  access_key="access_key",
  secret_key="secrey_key",
  region="region",
)

---

Check S3 structure in tree form

s3_tree = s3.make_tree(
    # with_file_name=True, # True if even the file name is included in the tree
    )

import json
s3_tree = json.dumps(s3_tree, indent=4, ensure_ascii=False)
print(s3_tree)

output:

{
    "assets/": {
        "assets/backup/": {},
        "assets/batch_raw/": {
            "assets/batch_raw/batchData": {}
        },
        ...
}

---

Check S3 structure in list form

s3_list = s3.list_files()
print(s3_list[:5], "\n...\n", s3_list[-5:])

output:

['first_file.json', 'second_file.json', ... ]

Find a specific file in s3

• find_file

test_path = s3.find_file(file_name="2021-12-31", str_contains=True)
print(f"2023-04-30 File path containing filename: '{test_path}'")

output:

"2023-04-30 File path containing filename: 'assets/csv/2023-04-30.csv'"

• find_files

prefix_path = test_path[:-len(test_path.split("/")[-1])]
test_files = s3.find_files(prefix=prefix_path)
print(f"Number of files under '{prefix_path}': {len(test_files)}")

output:

"Number of files under 'assets/csv/': 112"

---

Get from s3 to a specific path url

print(s3.get_file_url(file_name=test_path, expires_in=3600)) # Expires in 3600 seconds (1 hour)

output:

"https://bucket_name.s3.amazonaws.com/assets/csv/test.csv"

---

CRUD from S3

C, U(upload_file, _write_file)

• Upload files to s3
• The upload_file method reads the file and uploads it to memory, and the _write_file method writes the file directly without reading it, so memory usage is small.
• Use upload_file to upload a file in your local to the s3 bucket, and use _write_file to directly save a variable to s3 in the code.
• The write_csv, write_json, write_pkl, write_txt, and write_parquet methods call the _write_file method to save the file according to the extension.

R(_read_file)

• read file from s3
• The read_csv, read_json, read_pkl, read_txt, and read_parquet methods call the _read_file method to read files according to the extension.
• The read_auto method calls the above methods according to the extension to read the file.
• The read_thread method speeds up the read_auto method by executing it multi-threaded.

D(delete_file)

• Delete files from s3

examples

• This example uses the csv extension, but json, pkl, txt, and parquet extensions can be used equally (refer to the above methods for usage).

import pandas as pd

# Save variable to file (write_csv)
test_write_csv = pd.DataFrame({
    "test": [
        "한글",
        "English",
        1234,
        "!@#$%^&*()_+",
        "😀👍👍🏻👍🏼"
    ]
})
# directly save the variable (dataframe)
s3.write_csv(file_name="assets/test/test_write.csv", file_content=test_write_csv, encoding="utf-8", index=False)
# Compress and save in gzip or bzip2 format
s3.write_csv(file_name="assets/test/test_write.csv.gz", file_content=test_write_csv, compression="gzip", encoding="utf-8", index=False)
s3.write_csv(file_name="assets/test/test_write.csv.bz2", file_content=test_write_csv, compression="bz2", encoding="utf-8", index=False)

# Read the saved file (read_csv)
print(s3.read_csv.__doc__, end="\n====================\n")
pd.concat([
    s3.read_csv(file_name="assets/test/test_write.csv", encoding="utf-8").rename(columns={"test": "Basic format"}),
    # Read compressed files in gzip or bzip2 format
    s3.read_csv(file_name="assets/test/test_write.csv.gz", encoding="utf-8").rename(columns={"test": "gzip format"}),
    s3.read_csv(file_name="assets/test/test_write.csv.bz2", encoding="utf-8").rename(columns={"test": "bzip2 format"})
], axis=1)

output:

	Basic format	gzip format	bzip2 format
0	한글	한글	한글
1	English	English	English
2	1234	1234	1234
3	!@#$%^&*()_+	!@#$%^&*()_+	!@#$%^&*()_+
4	😀👍👍🏻👍🏼	😀👍👍🏻👍🏼	😀👍👍🏻👍🏼

# Download the saved file locally (download_file)
print(s3.download_file.__doc__, end="\n====================\n")
load_path = os.getcwd()
s3.download_file(file_name="assets/test/test_write.csv", load_path=load_path+"/test_write.csv")
s3.download_file(file_name="assets/test/test_write.csv.gz", load_path=load_path+"/test_write.csv.gz")
s3.download_file(file_name="assets/test/test_write.csv.bz2", load_path=load_path+"/test_write.csv.bz2")

# Delete a file on s3 (delete_file)
print(s3.delete_file.__doc__, end="\n====================\n")
print(f"List of files before deletion: {s3.find_files(prefix='assets/test/')}")
s3.delete_file(file_name="assets/test/test_write.csv")
s3.delete_file(file_name="assets/test/test_write.csv.gz")
s3.delete_file(file_name="assets/test/test_write.csv.bz2")
print(f"List of files after deletion: {s3.find_files(prefix='assets/test/')}")

output:

"List of files before deletion: ['assets/test/', 'assets/test/test.csv', 'assets/test/test.json', 'assets/test/test.parquet', 'assets/test/test.pickle', 'assets/test/test.pkl', 'assets/test/test.txt', 'assets/test/test_write.csv', 'assets/test/test_write.csv.bz2', 'assets/test/test_write.csv.gz']"
"List of files after deletion: ['assets/test/', 'assets/test/test.csv', 'assets/test/test.json', 'assets/test/test.parquet', 'assets/test/test.pickle', 'assets/test/test.pkl', 'assets/test/test.txt']"

# Upload a file stored locally (upload_file)
print(s3.upload_file.__doc__, end="\n====================\n")
print(f"List of files before upload: {s3.find_files(prefix='assets/test/')}")
s3.upload_file(file_name="assets/test/test_write.csv", file_path=load_path+"/test_write.csv")
s3.upload_file(file_name="assets/test/test_write.csv.gz", file_path=load_path+"/test_write.csv.gz")
s3.upload_file(file_name="assets/test/test_write.csv.bz2", file_path=load_path+"/test_write.csv.bz2")
print(f"List of files after upload: {s3.find_files(prefix='assets/test/')}")

output:

"List of files before upload: ['assets/test/', 'assets/test/test.csv', 'assets/test/test.json', 'assets/test/test.parquet', 'assets/test/test.pickle', 'assets/test/test.pkl', 'assets/test/test.txt']"
"List of files after upload: ['assets/test/', 'assets/test/test.csv', 'assets/test/test.json', 'assets/test/test.parquet', 'assets/test/test.pickle', 'assets/test/test.pkl', 'assets/test/test.txt', 'assets/test/test_write.csv', 'assets/test/test_write.csv.bz2', 'assets/test/test_write.csv.gz']"

# Delete local files
os.remove(load_path+"/test_write.csv")
os.remove(load_path+"/test_write.csv.gz")
os.remove(load_path+"/test_write.csv.bz2")

---

Methods that use CRUD in various ways

• read_auto
  • A method that executes one of read_csv, read_excel, read_json, read_parquet, and read_pkl depending on the file extension
  • You can automatically find the extension in the file name or specify the extension with the extension argument.
    
    
• read_thread
  • Execute the read_auto method with multi-threading
    
    
• compress, decompress
  • Compress and decompress files in s3 bucket and save as files
  • Using _read_file() method, _write_file() method
    
    

	test
0	한글
1	English
2	1234
3	!@#$%^&*()_+
4	😀👍👍🏻👍🏼

auto_path = s3.find_file(file_name="2022-12", str_contains=True)  # File path with filename containing 2022-12
print(f"File path with filename containing 2023-04-30: {auto_path}")
# Just put the folder path as prefix
folder_path = auto_path[:auto_path.rfind('/')] + '/'
print(f"Folder path of the file path: {folder_path}")
print(f"Number of files in the folder: {len(s3.find_files(prefix=folder_path))}")
auto_file = s3.read_thread(prefix=folder_path, encoding="cp949", workers=os.cpu_count(), extension="csv")
print(f"Number of data frames of files in the folder (list type): {len(auto_file)}")

output:

"File path with filename containing 2023-04-30: assets/csv/2023-04-30.csv"
"Folder path of the file path: assets/csv/"
"Number of files in the folder: 112"
"Number of data frames of files in the folder (list type): 112"

s3.compress(file_name="assets/test/test_write.csv", compression="gzip")
s3.compress(file_name="assets/test/test_write.csv", compression="bz2")
s3.decompress(file_name="assets/test/test_write.csv.gz")
s3.decompress(file_name="assets/test/test_write.csv.bz2")

output:

"The file assets/test/test_write.csv was compressed using gzip and saved as assets/test/test_write.csv.gz."
"The file assets/test/test_write.csv was compressed using bz2 and saved as assets/test/test_write.csv.bz2."
"The file assets/test/test_write.csv.gz was unzipped and saved as assets/test/test_write.csv."
"The file assets/test/test_write.csv.bz2 was unzipped and saved as assets/test/test_write.csv"