I want to copy a file in s3 bucket using python.

Ex : I have bucket name = test. And in the bucket, I have 2 folders name “dump” & “input”. Now I want to copy a file from local directory to S3 “dump” folder using python… Can anyone help me?

NOTE: This answer uses boto. See the other answer that uses boto3, which is newer.

Try this…

import boto
import boto.s3
import sys
from boto.s3.key import Key


bucket_name = AWS_ACCESS_KEY_ID.lower() + '-dump'
conn = boto.connect_s3(AWS_ACCESS_KEY_ID,

bucket = conn.create_bucket(bucket_name,

testfile = "replace this with an actual filename"
print 'Uploading %s to Amazon S3 bucket %s' % \
   (testfile, bucket_name)

def percent_cb(complete, total):

k = Key(bucket)
k.key = 'my test file'
    cb=percent_cb, num_cb=10)

I am not a pythonist, so thanks for the heads up about the import statements.
Also, I’d not recommend placing credentials inside your own source code. If you are running this inside AWS use IAM Credentials with Instance Profiles (http://docs.aws.amazon.com/IAM/latest/UserGuide/id_roles_use_switch-role-ec2_instance-profiles.html), and to keep the same behaviour in your Dev/Test environment, use something like Hologram from AdRoll (https://github.com/AdRoll/hologram)

import boto3

s3 = boto3.resource('s3')
BUCKET = "test"

s3.Bucket(BUCKET).upload_file("your/local/file", "dump/file")

No need to make it that complicated:

s3_connection = boto.connect_s3()
bucket = s3_connection.get_bucket('your bucket name')
key = boto.s3.key.Key(bucket, 'some_file.zip')
with open('some_file.zip') as f:

I used this and it is very simple to implement

import tinys3

conn = tinys3.Connection('S3_ACCESS_KEY','S3_SECRET_KEY',tls=True)

f = open('some_file.zip','rb')


Upload file to s3 within a session with credentials.

import boto3

session = boto3.Session(
s3 = session.resource('s3')
# Filename - File to upload
# Bucket - Bucket to upload to (the top level directory under AWS S3)
# Key - S3 object name (can contain subdirectories). If not specified then file_name is used
s3.meta.client.upload_file(Filename="input_file_path", Bucket="bucket_name", Key='s3_output_key')

from boto3.s3.transfer import S3Transfer
import boto3
#have all the variables populated which are required below
client = boto3.client('s3', aws_access_key_id=access_key,aws_secret_access_key=secret_key)
transfer = S3Transfer(client)
transfer.upload_file(filepath, bucket_name, folder_name+"https://stackoverflow.com/"+filename)

This is a three liner. Just follow the instructions on the boto3 documentation.

import boto3
s3 = boto3.resource(service_name="s3")
s3.meta.client.upload_file(Filename="C:/foo/bar/baz.filetype", Bucket="yourbucketname", Key = 'baz.filetype')

Some important arguments are:


  • Filename (str) — The path to the file to upload.
  • Bucket (str) — The name of the bucket to upload to.
  • Key (str) — The name of the that you want to assign to your file in your s3 bucket. This could be the same as the name of the file or a different name of your choice but the filetype should remain the same.

    Note: I assume that you have saved your credentials in a ~\.aws folder as suggested in the best configuration practices in the boto3 documentation.

  • This will also work:

    import os 
    import boto
    import boto.s3.connection
    from boto.s3.key import Key
        conn = boto.s3.connect_to_region('us-east-1',
        aws_access_key_id = 'AWS-Access-Key',
        aws_secret_access_key = 'AWS-Secrete-Key',
        # host="s3-website-us-east-1.amazonaws.com",
        # is_secure=True,               # uncomment if you are not using ssl
        calling_format = boto.s3.connection.OrdinaryCallingFormat(),
        bucket = conn.get_bucket('YourBucketName')
        path="images/holiday" #Directory Under which file should get upload
        full_key_name = os.path.join(path, key_name)
        k = bucket.new_key(full_key_name)
    except Exception,e:
        print str(e)
        print "error"   

    Using boto3

    import logging
    import boto3
    from botocore.exceptions import ClientError
    def upload_file(file_name, bucket, object_name=None):
        """Upload a file to an S3 bucket
        :param file_name: File to upload
        :param bucket: Bucket to upload to
        :param object_name: S3 object name. If not specified then file_name is used
        :return: True if file was uploaded, else False
        # If S3 object_name was not specified, use file_name
        if object_name is None:
            object_name = file_name
        # Upload the file
        s3_client = boto3.client('s3')
            response = s3_client.upload_file(file_name, bucket, object_name)
        except ClientError as e:
            return False
        return True

    For more:-

    import boto
    from boto.s3.key import Key
    END_POINT = ''                          # eg. us-east-1
    S3_HOST = ''                            # eg. s3.us-east-1.amazonaws.com
    BUCKET_NAME = 'test'        
    FILENAME = 'upload.txt'                
    UPLOADED_FILENAME = 'dumps/upload.txt'
    # include folders in file path. If it doesn't exist, it will be created
    s3 = boto.s3.connect_to_region(END_POINT,
    bucket = s3.get_bucket(BUCKET_NAME)
    k = Key(bucket)

    For upload folder example as following code and S3 folder picture
    enter image description here

    import boto
    import boto.s3
    import boto.s3.connection
    import os.path
    import sys    
    # Fill in info on data to upload
    # destination bucket name
    # source directory
    sourceDir="/home/willie/Desktop/x/"  #Linux Path
    # destination directory name (on s3)
    destDir="/test1/"   #S3 Path
    #max size in bytes before uploading in parts. between 1 and 5 GB recommended
    MAX_SIZE = 20 * 1000 * 1000
    #size of parts when uploading in parts
    PART_SIZE = 6 * 1000 * 1000
    access_key = 'MPBVAQ*******IT****'
    secret_key = '11t63yDV***********HgUcgMOSN*****'
    conn = boto.connect_s3(
            aws_access_key_id = access_key,
            aws_secret_access_key = secret_key,
            is_secure=False,               # uncomment if you are not using ssl
            calling_format = boto.s3.connection.OrdinaryCallingFormat(),
    bucket = conn.create_bucket(bucket_name,
    uploadFileNames = []
    for (sourceDir, dirname, filename) in os.walk(sourceDir):
    def percent_cb(complete, total):
    for filename in uploadFileNames:
        sourcepath = os.path.join(sourceDir + filename)
        destpath = os.path.join(destDir, filename)
        print ('Uploading %s to Amazon S3 bucket %s' % \
               (sourcepath, bucket_name))
        filesize = os.path.getsize(sourcepath)
        if filesize > MAX_SIZE:
            print ("multipart upload")
            mp = bucket.initiate_multipart_upload(destpath)
            fp = open(sourcepath,'rb')
            fp_num = 0
            while (fp.tell() < filesize):
                fp_num += 1
                print ("uploading part %i" %fp_num)
                mp.upload_part_from_file(fp, fp_num, cb=percent_cb, num_cb=10, size=PART_SIZE)
            print ("singlepart upload")
            k = boto.s3.key.Key(bucket)
            k.key = destpath
                    cb=percent_cb, num_cb=10)

    PS: For more reference URL

    If you have the aws command line interface installed on your system you can make use of pythons subprocess library.
    For example:

    import subprocess
    def copy_file_to_s3(source: str, target: str, bucket: str):
       subprocess.run(["aws", "s3" , "cp", source, f"s3://{bucket}/{target}"])

    Similarly you can use that logics for all sort of AWS client operations like downloading or listing files etc. It is also possible to get return values. This way there is no need to import boto3. I guess its use is not intended that way but in practice I find it quite convenient that way. This way you also get the status of the upload displayed in your console – for example:

    Completed 3.5 GiB/3.5 GiB (242.8 MiB/s) with 1 file(s) remaining

    To modify the method to your wishes I recommend having a look into the subprocess reference as well as to the AWS Cli reference.

    Note: This is a copy of my answer to a similar question.

    I have something that seems to me has a bit more order:

    import boto3
    from pprint import pprint
    from botocore.exceptions import NoCredentialsError
    class S3(object):
        BUCKET = "test"
        connection = None
        def __init__(self):
                vars = get_s3_credentials("aws")
                self.connection = boto3.resource('s3', 'aws_access_key_id',
            except(Exception) as error:
                self.connection = None
        def upload_file(self, file_to_upload_path, file_name):
            if file_to_upload is None or file_name is None: return False
                file_name = "your-folder-inside-s3/{0}".format(file_name)
                print("Upload Successful")
                return True
            except FileNotFoundError:
                print("The file was not found")
                return False
            except NoCredentialsError:
                print("Credentials not available")
                return False

    There’re three important variables here, the BUCKET const, the file_to_upload and the file_name

    BUCKET: is the name of your S3 bucket

    file_to_upload_path: must be the path from file you want to upload

    file_name: is the resulting file and path in your bucket (this is where you add folders or what ever)

    There’s many ways but you can reuse this code in another script like this

    import S3
    def some_function():
        S3.S3().upload_file(path_to_file, final_file_name)

    xmlstr = etree.tostring(listings,  encoding='utf8', method='xml')
    conn = boto.connect_s3(
            aws_access_key_id = access_key,
            aws_secret_access_key = secret_key,
            # host="<bucketName>.s3.amazonaws.com",
            #is_secure=False,               # uncomment if you are not using ssl
            calling_format = boto.s3.connection.OrdinaryCallingFormat(),
    bucket = conn.get_bucket('resources', validate=False)
    key= bucket.get_key('filename.txt')
    key.set_contents_from_string("SAMPLE TEXT")

    You should mention the content type as well to omit the file accessing issue.

    import os
    filename, file_extension = os.path.splitext(image)
    s3 = boto3.client('s3', config=boto3.session.Config(signature_version='s3v4'),
    s3.put_object(Body=image, Bucket=S3_BUCKET, Key=s3_filestore_path, ContentType=content_type)