Python ubuntu one client

How To Install python-os-client-config on Ubuntu 18.04

In this tutorial we learn how to install python-os-client-config on Ubuntu 18.04.

What is python-os-client-config

Os-client-config is a library for collecting client configuration for using an OpenStack cloud in a consistent and comprehensive manner. It will find cloud config for as few as 1 cloud and as many as you want to put in a config file. It will read environment variables and config files, and it also contains some vendor specific default values so that you don’t have to know extra info to use OpenStack

os-client-config honors all of the normal OS_* variables. It does not provide backwards compatibility to service-specific variables such as NOVA_USERNAME.

If you have environment variables and no config files, os-client-config will produce a cloud config object named “openstack” containing your values from the environment.

This package contains the Python 2.x module.

There are three methods to install python-os-client-config on Ubuntu 18.04. We can use apt-get , apt and aptitude . In the following sections we will describe each method. You can choose one of them.

Install python-os-client-config Using apt-get

Update apt database with apt-get using the following command.

After updating apt database, We can install python-os-client-config using apt-get by running the following command:

Install python-os-client-config Using apt

Update apt database with apt using the following command.

After updating apt database, We can install python-os-client-config using apt by running the following command:

Install python-os-client-config Using aptitude

If you want to follow this method, you might need to install aptitude first since aptitude is usually not installed by default on Ubuntu. Update apt database with aptitude using the following command.

After updating apt database, We can install python-os-client-config using aptitude by running the following command:

How To Uninstall python-os-client-config on Ubuntu 18.04

To uninstall only the python-os-client-config package we can use the following command:

Uninstall python-os-client-config And Its Dependencies

To uninstall python-os-client-config and its dependencies that are no longer needed by Ubuntu 18.04, we can use the command below:

Remove python-os-client-config Configurations and Data

To remove python-os-client-config configuration and data from Ubuntu 18.04 we can use the following command:

Remove python-os-client-config configuration, data, and all of its dependencies

We can use the following command to remove python-os-client-config configurations, data and all of its dependencies, we can use the following command:

References

Summary

In this tutorial we learn how to install python-os-client-config package on Ubuntu 18.04 using different package management tools: apt , apt-get and aptitude .

Источник

Python Socket Programming — Server, Client Example

While we believe that this content benefits our community, we have not yet thoroughly reviewed it. If you have any suggestions for improvements, please let us know by clicking the “report an issue“ button at the bottom of the tutorial.

Good Day Learners! In our previous tutorial, we discussed about Python unittest module. Today we will look into python socket programming example. We will create python socket server and client applications.

Python Socket Programming

To understand python socket programming, we need to know about three interesting topics — Socket Server, Socket Client and Socket. So, what is a server? Well, a server is a software that waits for client requests and serves or processes them accordingly. On the other hand, a client is requester of this service. A client program request for some resources to the server and server responds to that request. Socket is the endpoint of a bidirectional communications channel between server and client. Sockets may communicate within a process, between processes on the same machine, or between processes on different machines. For any communication with a remote program, we have to connect through a socket port. The main objective of this socket programming tutorial is to get introduce you how socket server and client communicate with each other. You will also learn how to write python socket server program.

Python Socket Example

1. Python socket server program executes at first and wait for any request
2. Python socket client program will initiate the conversation at first.
3. Then server program will response accordingly to client requests.
4. Client program will terminate if user enters “bye” message. Server program will also terminate when client program terminates, this is optional and we can keep server program running indefinitely or terminate with some specific command in client request.

Python Socket Server

We will save python socket server program as socket_server.py . To use python socket connection, we need to import socket module. Then, sequentially we need to perform some task to establish connection between server and client. We can obtain host address by using socket.gethostname() function. It is recommended to user port address above 1024 because port number lesser than 1024 are reserved for standard internet protocol. See the below python socket server example code, the comments will help you to understand the code.

import socket def server_program(): # get the hostname host = socket.gethostname() port = 5000 # initiate port no above 1024 server_socket = socket.socket() # get instance # look closely. The bind() function takes tuple as argument server_socket.bind((host, port)) # bind host address and port together # configure how many client the server can listen simultaneously server_socket.listen(2) conn, address = server_socket.accept() # accept new connection print("Connection from: " + str(address)) while True: # receive data stream. it won't accept data packet greater than 1024 bytes data = conn.recv(1024).decode() if not data: # if data is not received break break print("from connected user: " + str(data)) data = input(' -> ') conn.send(data.encode()) # send data to the client conn.close() # close the connection if __name__ == '__main__': server_program() 

So our python socket server is running on port 5000 and it will wait for client request. If you want server to not quit when client connection is closed, just remove the if condition and break statement. Python while loop is used to run the server program indefinitely and keep waiting for client request.

Python Socket Client

We will save python socket client program as socket_client.py . This program is similar to the server program, except binding. The main difference between server and client program is, in server program, it needs to bind host address and port address together. See the below python socket client example code, the comment will help you to understand the code.

import socket def client_program(): host = socket.gethostname() # as both code is running on same pc port = 5000 # socket server port number client_socket = socket.socket() # instantiate client_socket.connect((host, port)) # connect to the server message = input(" -> ") # take input while message.lower().strip() != 'bye': client_socket.send(message.encode()) # send message data = client_socket.recv(1024).decode() # receive response print('Received from server: ' + data) # show in terminal message = input(" -> ") # again take input client_socket.close() # close the connection if __name__ == '__main__': client_program() 

Python Socket Programming Output

To see the output, first run the socket server program. Then run the socket client program. After that, write something from client program. Then again write reply from server program. At last, write bye from client program to terminate both program. Below short video will show how it worked on my test run of socket server and client example programs.

pankaj$ python3.6 socket_server.py Connection from: ('127.0.0.1', 57822) from connected user: Hi -> Hello from connected user: How are you? -> Good from connected user: Awesome! -> Ok then, bye! pankaj$ 

pankaj$ python3.6 socket_client.py -> Hi Received from server: Hello -> How are you? Received from server: Good -> Awesome! Received from server: Ok then, bye! -> Bye pankaj$ 

Notice that socket server is running on port 5000 but client also requires a socket port to connect to the server. This port is assigned randomly by client connect call. In this case, it’s 57822. So, that’s all for Python socket programming, python socket server and socket client example programs. Reference: Official Documentation

Thanks for learning with the DigitalOcean Community. Check out our offerings for compute, storage, networking, and managed databases.

Источник

Blog

One of the projects I’ve been working on has been to improve aspects of the Ubuntu One Developer Documentation web site. While there are still some layout problems we are working on, it is now in a state where it is a lot easier for us to update.

I have been working on updating our authentication/authorisation documentation and revising some of the file storage documentation (the API used by the mobile Ubuntu One clients). To help verify that the documentation was useful, I wrote a small program to exercise those APIs. The result is u1ftp: a program that exposes a user’s files via an FTP daemon running on localhost. In conjunction with the OS file manager or a dedicated FTP client, this can be used to conveniently access your files on a system without the full Ubuntu One client installed.

You can download the program from:

To make it easy to run on as many systems as possible, I packaged it up as a runnable zip file so can be run directly by the Python interpreter. As well as a Python interpreter, you will need the following installed to run it:

• On Linux systems, either the gnomekeyring extension (if you are using a GNOME derived desktop), or PyKDE4 (if you have a KDE derived desktop).
• On Windows, you will need pywin32.
• On MacOS X, you shouldn’t need any additional modules.

These could not be included in the zip file because they are extension modules rather than pure Python.

Once you’ve downloaded the program, you can run it with the following command:

This will start the FTP server listening at ftp://localhost:2121/. Pointing a file manager at that URL should prompt you to log in, where you can use your standard Ubuntu One credentials and start browsing your files. It will verify the credentials against the Ubuntu SSO service and issue an OAuth token that it stores in the keyring. The OAuth token is then used to authenticate requests to the file storage REST API.

While I expect this program to be useful on its own, it was also intended to act as an example of how the Ubuntu One API can be used. One way to browse the source is to simply unzip the package and poke around. Alternatively, you can check out the source directly from Launchpad:

If you come up with an interesting extension to u1ftp, feel free to upload your changes as a branch on Launchpad.

Источник