Playing with python library(boto) and S3

Here is a simple example of a python script that play with boto api:

 import requests, json
import datetime
import hashlib
import boto
import boto.s3.connection
from boto.s3.key import Key
import os,math 
from filechunkio import FileChunkIO

access_key = 'you access key'
secret_key = 'your secret key'

if __name__ == "__main__":  
      conn = boto.connect_s3(access_key,secret_key)  
      print conn.get_all_buckets()  
      '''list all bucket'''  
      for bucket in conn.get_all_buckets():  
           print bucket  
      '''create new bucket'''  
      #bucket = conn.create_bucket('hsn-bucket')  
      ''' select a bucket '''  
      bucket = conn.get_bucket('hsn-bucket')  
      ''' create a text file and upload it in bucket'''  
      k = Key(bucket)  
      k.key = 'dir/foobar'  
      k.set_contents_from_string('This is a test of S3')  
      ## Get file info  
      source_path = r'D:\file\test1.pdf'  
      source_size = os.stat(source_path).st_size  
      #get all keys in bucket  
      print bucket.get_all_keys()  
      '''upload local file once at time'''  
      #the name of the file has to be set as key  
      k.key=os.path.basename(source_path)  
      k.set_contents_from_filename(source_path)  
      '''upload file divided into multiple parts'''  
      # Create a multipart upload request  
      mp = bucket.initiate_multipart_upload(os.path.basename(source_path))  
      # Use a chunk size (minimum size is 50MiB) 
      chunk_size = 5242880  
      chunk_count = int(math.ceil(source_size / chunk_size))  
      # Send the file parts, using FileChunkIO to create a file-like object that points to a certain byte range within the original file. We set bytes to never exceed the original file size.  
      for i in range(chunk_count + 1):  
           offset = chunk_size * i  
           bytes = min(chunk_size, source_size - offset)  
           with FileChunkIO(source_path, 'r', offset=offset,bytes=bytes) as fp:  
                mp.upload_part_from_file(fp, part_num=i + 1)  
      # Finish the upload  
      mp.complete_upload()