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cloudmesh-common

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cloudmesh-common

A set of useful APIs for cloudmesh

  • 5.0.59
  • PyPI
  • Socket score

Maintainers
2

Cloudmesh Common

image Python License Format Status Travis

Installation and Documentation

Please note that several packages are available which are pointed to in the installation documentation.

Links
Documentationhttps://cloudmesh.github.io/cloudmesh-cloud
Codehttps://github.com/cloudmesh/cloudmesh-cloud
Installation Instructionshttps://github.com/cloudmesh/get

Highlighted features

This library contains a number of useful functions and APIs that we highlight here. They are used to interact with the system and provide a number of functions to implement command line programs and shells.

Console

The console provides convenient way to print colored messages types in the terminal, such as errors, info, and regular messages

from cloudmesh.common.console import Console

Console.error("this is an error printed in red with prefix ERROR:")
Console.msg("this is a msg printed in black")
Console.ok("this is an ok message printed in green")

Shell

We have lots of shell commands that call linux commands, but also have a convenient execution command that returns the results in a string.

For more information we like you to inspect the source code:

from cloudmesh.common.Shell import Shell

shell = Shell()

print(shell.terminal_type())

# prints after the command is finished
r = shell.execute('pwd') 
print(r)

# prints while the command is executed
r = shell.live('pwd') 
print(r)

# open a new terminal and start the command ls in it (for OSX and Gnome)
shell.terminal("ls")

# an example of a build in command
shell.pip("install cloudmesh-common")

We have many such build in commands, please see the source

Printer

A convenient way to print dictionaries and lists with repeated entries as tables, csv, json, yaml. The dictionaries can even be hierarchical.

Let us assume we have

data = [
    {
        "name": "Gregor",
        "address": {
            "street": "Funny Lane 11",
            "city": "Cloudville"
        {
    },
    {
        "name": "Albert",
        "address": {
            "street": "Memory Lane 1901",
            "city": "Cloudnine"
        }
    }
]

Then we can print it nicely with

print(Printer.flatwrite(self.data,
                    sort_keys=["name"],
                    order=["name", "address.street", "address.city"],
                    header=["Name", "Street", "City"],
                    output="table")
          )

Other formats such as csv, json, dict are also supported.

In addition we have also printers for printing attribute lists. Please consult the source code.

StopWatch

See: https://colab.research.google.com/drive/1tG7IcP-XMQiNVxU05yazKQYciQ9GpMat#scrollTo=TZAjATZiQh4q&uniqifier=1 for an example

Using Cloudmesh StopWatch Inline

from cloudmesh.common.StopWatch import StopWatch
import time

StopWatch.start("a")
time.sleep(3)
StopWatch.stop("a")
StopWatch.status("a", True)
StopWatch.benchmark()

Using Cloudmesh Benchmark wrapped in Functions

If it is not wrapped in functions, do not use it this way.

from cloudmesh.common.Benchmark import Benchmark
import time
  
def b():
  Benchmark.Start()
  time.sleep(3)
  Benchmark.Stop()

def c():
  Benchmark.Start()
  time.sleep(1)
  Benchmark.Stop()

 b()
 c()

Benchmark.print()

dotdict

One dimensional Dictionaries in dot format.

from cloudmesh.common.dotdict import doctict

# convert a simple dict to a dotdict
d = dotdict({"name": "Gregor"})
# Now you can say
print(d["name"])
print(d.name)

ssh

util

Very useful functions are included in util

Especially useful are

  • generating passwords
  • banners
  • yn_choices
  • path_expansion
  • grep (simple line matching)
  • HEADING() which without parameter identifies the name of the function and prints its name within a banner

Changes

  • added support for terminals with dark background

Acknowledgments

Continued work was in part funded by the NSF CyberTraining: CIC: CyberTraining for Students and Technologies from Generation Z with the award numbers 1829704 and 2200409.

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