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acris is a python library of programming patterns that we use, at acrisel, in Python projects and choose to contribute to Python community

Project description

Overview

acris is a python library providing useful programming patterns and tools.

acris started as Acrisel’s internal idioms and utilities for programmers.

It included:
  1. programming idioms that are repeatedly used by programmers.

  2. utilities that helps programmers and administrators manage their environments

We decided to contribute this library to Python community as a token of appreciation to what this community enables us.

We hope that you will find this library useful and helpful as we find it.

If you have comments or insights, please don’t hesitate to contact us at support@acrisel.com

Programming Idoms

threadit

decorator for methods that can be executed as a thread.

example

from acris import threadit
from time import sleep

class ThreadedExample(object):
    @threadit
    def proc(self, id_, num, stall):
        s=num
        while num > 0:
            print("%s: %s" % (id_, s))
            num -= 1
            s += stall
            sleep(stall)
        print("%s: %s" % (id_, s))
        return s

class RetVal(object):
    def __init__(self, name):
        self.name=name

    def __call__(self, retval):
        print(self.name, ':', retval)

example output

te1=ThreadedExample().proc(1, 3, 1)
te2=ThreadedExample().proc(2, 3, 5)

te1.addCallback(RetVal('te1'))
te2.addCallback(RetVal('te2'))

will produce:

1: 3
2: 3
1: 4
1: 5
1: 6
te1 : 6
2: 8
2: 13
2: 18
te2 : 18

Singleton and NamedSingleton

meta class that creates singleton footprint of classes inheriting from it.

Singleton example

from acris import Singleton

class Sequence(Singleton):
    step_id=0

    def __call__(self):
        step_id=self.step_id
        self.step_id += 1
        return step_id

example output

A=Sequence()
print('A', A())
print('A', A())
B=Sequence()
print('B', B())

will produce:

A 0
A 1
B 2

NamedSingleton example

from acris import Singleton

class Sequence(NamedSingleton):
    step_id=0

    def __init__(self, name=''):
        self.name=name

    def __call__(self,):
        step_id=self.step_id
        self.step_id += 1
        return step_id

example output

A=Sequence('A')
print(A.name, A())
print(A.name, A())
B=Sequence('B')
print(B.name, B())

will produce:

A 0
A 1
B 0

Sequence

meta class to produce sequences. Sequence allows creating different sequences using name tags.

example

from acris import Sequence

A=Sequence('A')
print('A', A())
print('A', A())
B=Sequence('B')
print('B', B())

A=Sequence('A')
print('A', A())
print('A', A())
B=Sequence('B')
print('B', B())

example output

A 0
A 1
B 0
A 2
A 3
B 1

TimedSizedRotatingHandler

Use TimedSizedRotatingHandler is combining TimedRotatingFileHandler with RotatingFileHandler. Usage as handler with logging is as defined in Python’s logging how-to

example

import logging

# create logger
logger = logging.getLogger('simple_example')
logger.setLevel(logging.DEBUG)

# create console handler and set level to debug
ch = logging.TimedRotatingFileHandler()
ch.setLevel(logging.DEBUG)

# create formatter
formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')

# add formatter to ch
ch.setFormatter(formatter)

# add ch to logger
logger.addHandler(ch)

# 'application' code
logger.debug('debug message')
logger.info('info message')
logger.warn('warn message')
logger.error('error message')
logger.critical('critical message')

MpLogger and LevelBasedFormatter

Multiprocessor logger using QueueListener and QueueHandler It uses TimedSizedRotatingHandler as its logging handler

It also uses acris provided LevelBasedFormatter which facilitate message formats based on record level. LevelBasedFormatter inherent from logging.Formatter and can be used as such in customized logging handlers.

example

Within main process
import time
import random
import logging
from acris import MpLogger
import os
import multiprocessing as mp

logger=logging.getLogger(__name__)

def subproc(limit=1):
    for i in range(limit):
        sleep_time=3/random.randint(1,10)
        time.sleep(sleep_time)
        logger.info("proc [%s]: %s/%s - sleep %4.4ssec" % (os.getpid(), i, limit, sleep_time))

level_formats={logging.DEBUG:"[ %(asctime)s ][ %(levelname)s ][ %(message)s ][ %(module)s.%(funcName)s(%(lineno)d) ]",
                'default':   "[ %(asctime)s ][ %(levelname)s ][ %(message)s ]",
                }

mplogger=MpLogger(logging_level=logging.DEBUG, level_formats=level_formats, datefmt='%Y-%m-%d,%H:%M:%S.%f')
mplogger.start()

logger.debug("starting sub processes")
procs=list()
for limit in [1, 1]:
    proc=mp.Process(target=subproc, args=(limit, ))
    procs.append(proc)
    proc.start()

for proc in procs:
    if proc:
        proc.join()

logger.debug("sub processes completed")

mplogger.stop()
Within individual process
import logging

logger=logging.getLogger(__name__)
logger.debug("logging from sub process")

Example output

[ 2016-12-19,11:39:44.953189 ][ DEBUG ][ starting sub processes ][ mplogger.<module>(45) ]
[ 2016-12-19,11:39:45.258794 ][ INFO ][ proc [932]: 0/1 - sleep  0.3sec ]
[ 2016-12-19,11:39:45.707914 ][ INFO ][ proc [931]: 0/1 - sleep 0.75sec ]
[ 2016-12-19,11:39:45.710487 ][ DEBUG ][ sub processes completed ][ mplogger.<module>(56) ]

Decorators

Useful decorators for production and debug.

traced_method

logs entry and exit of function or method.

from acris import traced_method

traced=traced_method(print, print_args=True, print_result=True)

class Oper(object):
    def __init__(self, value):
        self.value=value

    def __repr__(self):
        return str(self.value)

    @traced
    def mul(self, value):
        self.value*=value
        return self

    @traced
    def add(self, value):
        self.value+=value
        return self

o=Oper(3)
print(o.add(2).mul(5).add(7).mul(8))

would result with the following output:

[ add ][ entering][ args: (2) ][ kwargs: {} ][ trace_methods.py.Oper(39) ]
[ add ][ exiting ] [ time span: 0:00:00.000056][ result: 5 ][ trace_methods.py.Oper(39) ]
[ mul ][ entering][ args: (5) ][ kwargs: {} ][ trace_methods.py.Oper(34) ]
[ mul ][ exiting ] [ time span: 0:00:00.000010][ result: 25 ][ trace_methods.py.Oper(34) ]
[ add ][ entering][ args: (7) ][ kwargs: {} ][ trace_methods.py.Oper(39) ]
[ add ][ exiting ] [ time span: 0:00:00.000007][ result: 32 ][ trace_methods.py.Oper(39) ]
[ mul ][ entering][ args: (8) ][ kwargs: {} ][ trace_methods.py.Oper(34) ]
[ mul ][ exiting ] [ time span: 0:00:00.000008][ result: 256 ][ trace_methods.py.Oper(34) ]
256

Data Types

varies derivative of Python data types

MergeChainedDict

Similar to ChainedDict, but merged the keys and is actually derivative of dict.

a={1:11, 2:22}
b={3:33, 4:44}
c={1:55, 4:66}
d=MergedChainedDict(c, b, a)
print(d)

Will output:

{1: 55, 2: 22, 3: 33, 4: 66}

ResourcePool

Resource pool provides program with interface to manager resource pools. This is used as means to funnel processing.

ResourcePoolRequestor object can be used to request resource set resides in multiple pools.

ResourcePoolRequestors object manages multiple requests for multiple resources.

Sync Example

import time
from acris import resource_pool as rp
from acris import Threaded
import queue
from datetime import datetime

class MyResource1(rp.Resource): pass

class MyResource2(rp.Resource): pass

rp1=rp.ResourcePool('RP1', resource_cls=MyResource1, policy={'resource_limit': 2, }).load()
rp2=rp.ResourcePool('RP2', resource_cls=MyResource2, policy={'resource_limit': 1, }).load()

@Threaded()
def worker_awaiting(name, rp):
    print('[ %s ] %s getting resource' % (str(datetime.now()), name ) )
    r=rp.get()
    print('[ %s ] %s doing work (%s)' % (str(datetime.now()), name, repr(r)))
    time.sleep(4)
    print('[ %s ] %s returning %s' % (str(datetime.now()), name, repr(r)))
    rp.put(*r)


r1=worker_awaiting('>>> w11-direct', rp1)
r2=worker_awaiting('>>> w21-direct', rp2)
r3=worker_awaiting('>>> w22-direct', rp2)
r4=worker_awaiting('>>> w12-direct', rp1)

Sync Example Output

[ 2016-12-11 13:06:14.659569 ] >>> w11-direct getting resource
[ 2016-12-11 13:06:14.659640 ] >>> w11-direct doing work ([Resource(name:MyResource1)])
[ 2016-12-11 13:06:14.659801 ] >>> w21-direct getting resource
[ 2016-12-11 13:06:14.659834 ] >>> w21-direct doing work ([Resource(name:MyResource2)])
[ 2016-12-11 13:06:14.659973 ] >>> w22-direct getting resource
[ 2016-12-11 13:06:14.660190 ] >>> w12-direct getting resource
[ 2016-12-11 13:06:14.660260 ] >>> w12-direct doing work ([Resource(name:MyResource1)])
[ 2016-12-11 13:06:18.662362 ] >>> w11-direct returning [Resource(name:MyResource1)]
[ 2016-12-11 13:06:18.662653 ] >>> w21-direct returning [Resource(name:MyResource2)]
[ 2016-12-11 13:06:18.662826 ] >>> w12-direct returning [Resource(name:MyResource1)]
[ 2016-12-11 13:06:18.662998 ] >>> w22-direct doing work ([Resource(name:MyResource2)])
[ 2016-12-11 13:06:22.667149 ] >>> w22-direct returning [Resource(name:MyResource2)]

Async Example

import time
from acris import resource_pool as rp
from acris import Threaded
import queue
from datetime import datetime

class MyResource1(rp.Resource): pass

class MyResource2(rp.Resource): pass

rp1=rp.ResourcePool('RP1', resource_cls=MyResource1, policy={'resource_limit': 2, }).load()
rp2=rp.ResourcePool('RP2', resource_cls=MyResource2, policy={'resource_limit': 1, }).load()

class Callback(object):
    def __init__(self, notify_queue):
        self.q=notify_queue
    def __call__(self, resources=None):
        self.q.put(resources)

@Threaded()
def worker_callback(name, rp):
    print('[ %s ] %s getting resource' % (str(datetime.now()), name))
    notify_queue=queue.Queue()
    r=rp.get(callback=Callback(notify_queue))

    if not r:
        print('[ %s ] %s doing work before resource available' % (str(datetime.now()), name,))
        print('[ %s ] %s waiting for resources' % (str(datetime.now()), name,))
        ticket=notify_queue.get()
        r=rp.get(ticket=ticket)

    print('[ %s ] %s doing work (%s)' % (str(datetime.now()), name, repr(r)))
    time.sleep(2)
    print('[ %s ] %s returning (%s)' % (str(datetime.now()), name, repr(r)))
    rp.put(*r)

r1=worker_callback('>>> w11-callback', rp1)
r2=worker_callback('>>> w21-callback', rp2)
r3=worker_callback('>>> w22-callback', rp2)
r4=worker_callback('>>> w12-callback', rp1)

Async Example Output

[ 2016-12-11 13:08:24.410447 ] >>> w11-callback getting resource
[ 2016-12-11 13:08:24.410539 ] >>> w11-callback doing work ([Resource(name:MyResource1)])
[ 2016-12-11 13:08:24.410682 ] >>> w21-callback getting resource
[ 2016-12-11 13:08:24.410762 ] >>> w21-callback doing work ([Resource(name:MyResource2)])
[ 2016-12-11 13:08:24.410945 ] >>> w22-callback getting resource
[ 2016-12-11 13:08:24.411227 ] >>> w22-callback doing work before resource available
[ 2016-12-11 13:08:24.411273 ] >>> w12-callback getting resource
[ 2016-12-11 13:08:24.411334 ] >>> w22-callback waiting for resources
[ 2016-12-11 13:08:24.411452 ] >>> w12-callback doing work ([Resource(name:MyResource1)])
[ 2016-12-11 13:08:26.411901 ] >>> w11-callback returning ([Resource(name:MyResource1)])
[ 2016-12-11 13:08:26.412200 ] >>> w21-callback returning ([Resource(name:MyResource2)])
[ 2016-12-11 13:08:26.412505 ] >>> w22-callback doing work ([Resource(name:MyResource2)])
[ 2016-12-11 13:08:26.416130 ] >>> w12-callback returning ([Resource(name:MyResource1)])
[ 2016-12-11 13:08:28.416001 ] >>> w22-callback returning ([Resource(name:MyResource2)])

Requestor Example

import time
from acris import resource_pool as rp
from acris import Threaded
import queue
from datetime import datetime

class MyResource1(rp.Resource): pass

class MyResource2(rp.Resource): pass

rp1=rp.ResourcePool('RP1', resource_cls=MyResource1, policy={'resource_limit': 2, }).load()
rp2=rp.ResourcePool('RP2', resource_cls=MyResource2, policy={'resource_limit': 2, }).load()

class Callback(object):
    def __init__(self, notify_queue):
        self.q=notify_queue
    def __call__(self, ready=False):
        self.q.put(ready)

@Threaded()
def worker_callback(name, rps):
    print('[ %s ] %s getting resource' % (str(datetime.now()), name))
    notify_queue=queue.Queue()
    callback=Callback(notify_queue, name=name)
    request=rp.Requestor(request=rps, callback=callback)

    if request.is_reserved():
        resources=request.get()
    else:
        print('[ %s ] %s doing work before resource available' % (str(datetime.now()), name,))
        print('[ %s ] %s waiting for resources' % (str(datetime.now()), name,))
        notify_queue.get()
        resources=request.get()

    print('[ %s ] %s doing work (%s)' % (str(datetime.now()), name, repr(resources)))
    time.sleep(2)
    print('[ %s ] %s returning (%s)' % (str(datetime.now()), name, repr(resources)))
    request.put(*resources)

r1=worker_callback('>>> w11-callback', [(rp1,1),])
r2=worker_callback('>>> w21-callback', [(rp1,1),(rp2,1)])
r3=worker_callback('>>> w22-callback', [(rp1,1),(rp2,1)])
r4=worker_callback('>>> w12-callback', [(rp1,1),])

Requestor Example Output

[ 2016-12-13 06:27:54.924629 ] >>> w11-callback getting resource
[ 2016-12-13 06:27:54.925094 ] >>> w21-callback getting resource
[ 2016-12-13 06:27:54.925453 ] >>> w22-callback getting resource
[ 2016-12-13 06:27:54.926188 ] >>> w12-callback getting resource
[ 2016-12-13 06:27:54.932922 ] >>> w11-callback doing work ([Resource(name:MyResource1)])
[ 2016-12-13 06:27:54.933709 ] >>> w12-callback doing work ([Resource(name:MyResource1)])
[ 2016-12-13 06:27:54.938425 ] >>> w22-callback doing work before resource available
[ 2016-12-13 06:27:54.938548 ] >>> w22-callback waiting for resources
[ 2016-12-13 06:27:54.939256 ] >>> w21-callback doing work before resource available
[ 2016-12-13 06:27:54.939267 ] >>> w21-callback waiting for resources
[ 2016-12-13 06:27:56.936881 ] >>> w11-callback returning ([Resource(name:MyResource1)])
[ 2016-12-13 06:27:56.937543 ] >>> w12-callback returning ([Resource(name:MyResource1)])
[ 2016-12-13 06:27:56.947615 ] >>> w22-callback doing work ([Resource(name:MyResource2), Resource(name:MyResource1)])
[ 2016-12-13 06:27:56.948587 ] >>> w21-callback doing work ([Resource(name:MyResource2), Resource(name:MyResource1)])
[ 2016-12-13 06:27:58.949812 ] >>> w22-callback returning ([Resource(name:MyResource2), Resource(name:MyResource1)])
[ 2016-12-13 06:27:58.950064 ] >>> w21-callback returning ([Resource(name:MyResource2), Resource(name:MyResource1)])

Virtual ResourcePool

Like ResourcePool, VResourcePool manages resources. The main difference between the two is that ResourcePool manages physical resource objects. VResourcePool manages virtual resources (VResource) that only represent physical resources. VResources can not be activated or deactivated.

One unique property VResourcePool enables is that request could be returned by quantity.

Virtual Requestors Example

import time
from acris import virtual_resource_pool as rp
from acris.threaded import Threaded
from acris.mplogger import create_stream_handler
import queue
from datetime import datetime

class MyResource1(rp.Resource): pass
class MyResource2(rp.Resource): pass

rp1=rp.ResourcePool('RP1', resource_cls=MyResource1, policy={'resource_limit': 2, }).load()
rp2=rp.ResourcePool('RP2', resource_cls=MyResource2, policy={'resource_limit': 1, }).load()

class Callback(object):
    def __init__(self, notify_queue, name=''):
        self.q=notify_queue
        self.name=name
    def __call__(self,received=False):
        self.q.put(received)

requestors=rp.Requestors()

@Threaded()
def worker_callback(name, rps):
    print('[ %s ] %s getting resource' % (str(datetime.now()), name))
    notify_queue=queue.Queue()
    callback=Callback(notify_queue, name=name)
    request_id=requestors.reserve(request=rps, callback=callback)

    if not requestors.is_reserved(request_id):
        print('[ %s ] %s doing work before resource available' % (str(datetime.now()), name,))
        notify_queue.get()
    resources=requestors.get(request_id)

    print('[ %s ] %s doing work (%s)' % (str(datetime.now()), name, repr(resources)))
    time.sleep(1)
    print('[ %s ] %s returning (%s)' % (str(datetime.now()), name, repr(resources)))
    requestors.put_requested(rps)

r2=worker_callback('>>> w21-callback', [(rp1,1), (rp2,1)])
r1=worker_callback('>>> w11-callback', [(rp1,1),])
r3=worker_callback('>>> w22-callback', [(rp1,1), (rp2,1)])
r4=worker_callback('>>> w12-callback', [(rp1,1),])

Virtual Requestor Example Output

[ 2016-12-16 14:27:53.224110 ] >>> w21-callback getting resource
[ 2016-12-16 14:27:53.224750 ] >>> w11-callback getting resource
[ 2016-12-16 14:27:53.225567 ] >>> w22-callback getting resource
[ 2016-12-16 14:27:53.226220 ] >>> w12-callback getting resource
[ 2016-12-16 14:27:53.237146 ] >>> w11-callback doing work ([Resource(name:MyResource1)])
[ 2016-12-16 14:27:53.238361 ] >>> w12-callback doing work before resource available
[ 2016-12-16 14:27:53.241046 ] >>> w21-callback doing work before resource available
[ 2016-12-16 14:27:53.242350 ] >>> w22-callback doing work ([Resource(name:MyResource1), Resource(name:MyResource2)])
[ 2016-12-16 14:27:54.238443 ] >>> w11-callback returning ([Resource(name:MyResource1)])
[ 2016-12-16 14:27:54.246868 ] >>> w22-callback returning ([Resource(name:MyResource1), Resource(name:MyResource2)])
[ 2016-12-16 14:27:54.257040 ] >>> w12-callback doing work ([Resource(name:MyResource1)])
[ 2016-12-16 14:27:54.259858 ] >>> w21-callback doing work ([Resource(name:MyResource1), Resource(name:MyResource2)])
[ 2016-12-16 14:27:55.258659 ] >>> w12-callback returning ([Resource(name:MyResource1)])
[ 2016-12-16 14:27:55.262741 ] >>> w21-callback returning ([Resource(name:MyResource1), Resource(name:MyResource2)])

Mediator

Class interface to generator allowing query of has_next()

Example

from acris import Mediator

def yrange(n):
    i = 0
    while i < n:
        yield i
        i += 1

n=10
m=Mediator(yrange(n))
for i in range(n):
    print(i, m.has_next(3), next(m))
print(i, m.has_next(), next(m))

Example Output

0 True 0
1 True 1
2 True 2
3 True 3
4 True 4
5 True 5
6 True 6
7 True 7
8 False 8
9 False 9
Traceback (most recent call last):
  File "/private/var/acrisel/sand/acris/acris/acris/example/mediator.py", line 19, in <module>
    print(i, m.has_next(), next(m))
  File "/private/var/acrisel/sand/acris/acris/acris/acris/mediator.py", line 38, in __next__
    value=next(self.generator)
StopIteration

Utilities

commdir.py

usage: commdir.py [-h] [--dir1 DIR1] [--dir2 DIR2] [--quiet] [--out [REPORT]]
                  [--follow] [--detailed] [--sync-cmd] [--merge] [--total]
                  [--ignore [PATTERN [PATTERN ...]]]

Reports differences in directory structure and content. commdir.py will exit
with 0 if directories found the same. otherwise, it will exit with 1.

optional arguments:
  -h, --help            show this help message and exit
  --dir1 DIR1           source folder for the comparison
  --dir2 DIR2           target folder for the comparison
  --quiet               avoid writing any report out, default: False
  --out [REPORT]        file to write report to, default: stdout
  --follow              follow links when walking folders, default: False
  --detailed            provide detailed file level diff, default: False
  --sync-cmd            provide commands that would align dirs and files,
                        default: False
  --merge               when sync-cmd, set how diff commands would be
                        resolved, default: dir1 is base.
  --total               outputs summary.
  --ignore [PATTERN [PATTERN ...]]
                        pattern to ignore

example: python commdir.py --dir1 my_folder --dir2 other_folder --ignore __pycache__ .*DS_Store

commdir.py also provides access to its underlined function commdir:

commdir(dir1, dir2, ignore=[], detailed=False, followlinks=False, quiet=False, bool_result=True)

compares two directory structures and their files.

commdir walks through two directories, dir1 and dir2. While walking, it aggregates information on the difference between the two structures and their content.

If bool_result is True, commdir will return True if difference was found. When False, it would return a DiffContent namedtuple with the following fields:

  • diff (boolean)

  • folders_only_in_dir1 (list)

  • folders_only_in_dir2 (list)

  • files_only_in_dir1 (list)

  • files_only_in_dir2 (list)

  • diff_files (list)

  • diff_detail (list)

Args:

dir1, dir2: two directories structure to compare. ignore: list of regular expression strings to ignore, when directory is ignored, all its sub folders are ignored too. detailed: if set, will generate detailed file level comparison. followlinks: if set, symbolic links will be followed. quiet: if set, information will not be printed to stdio. bool_result: instruct how the function would respond to caller (True: boolean or False: DiffContent)

commdir example output

----------------------------
folders only in other_folder
----------------------------
   static/admin/fonts
   static/admin/js/vendor
   static/admin/js/vendor/jquery
   static/admin/js/vendor/xregexp
-----------------------
files only in my_folder
-----------------------
   docs/._example.rst
   docs/._user_guide.rst
--------------------------
files only in other_folder
--------------------------
   static/admin/css/fonts.css
   static/admin/fonts/LICENSE.txt
   static/admin/fonts/README.txtff
   static/admin/img/LICENSE
   static/admin/js/vendor/jquery/jquery.js
   static/admin/js/vendor/jquery/jquery.min.js
   static/admin/js/vendor/xregexp/xregexp.min.js
----------------
files different:
----------------
   .pydevproject
   ui/settings/prod.py
   ui/wsgi.py
   personalenv.xml
--------
Summary:
--------
  Folders only in my_folder: 0
  Files only in my_folder: 2
  Folders only in other_folder: 4
  Files only in other_folder: 7
  Files different: 4

bee.py

utility to run commands on multiple hosts and collect responses.

usage: bee.py [-h] -c COMMAND [-p PARALLEL] -t HOST [-u USERNAME]
              [--sudo-user USERNAME] [--keep-log]

Sends ssh command to multiple destinations.

optional arguments:
  -h, --help            show this help message and exit
  -c COMMAND, --command COMMAND
                        command to execute over ssh channel
  -p PARALLEL, --parallel PARALLEL
                        number of parallel session to open
  -t HOST, --target HOST
                        destination host to run against
  -u USERNAME, --user USERNAME
                        user to use for ssh authentication
  --sudo-user USERNAME  sudo user to use to run commands
  --keep-log            indicates bee to keep host logs instead of deleting

csv2xlsx.py

converts multiple CSV file to XLSX file. Each CSV file will end on its own sheet.

usage: csv2xlsx.py [-h] [-d DELIMITER] [-o OUTFILE] CSV [CSV ...]

Creates Excel file from one or more CSV files. If multiple CSV are provided,
they wiull be mapped to separated sheets. If "-" is provided, input will be
acquire from stdin.

positional arguments:
  CSV                   csv files to merge in xlsx; if -, stdin is assumed

optional arguments:
  -h, --help            show this help message and exit
  -d DELIMITER, --delimiter DELIMITER
                        select delimiter character
  -o OUTFILE, --out OUTFILE
                        output xlsx filename

mail.py

send mail utility and function API

usage: mail.py [-h] [-a ATTACHMENT] [-o FILE] -s SUBJECT [-b BODY]
               [-f MAILFROM] [-c CC] -t RECIPIENT

Send the contents of a directory as a MIME message. Unless the -o option is
given, the email is sent by forwarding to your local SMTP server, which then
does the normal delivery process. Your local machine must be running an SMTP
server.

optional arguments:
  -h, --help            show this help message and exit
  -a ATTACHMENT, --attach ATTACHMENT
                        Mail the contents of the specified directory or file,
                        Only the regular files in the directory are sent, and
                        we don't recurse to subdirectories.
  -o FILE, --output FILE
                        Print the composed message to FILE instead of sending
                        the message to the SMTP server.
  -s SUBJECT, --subject SUBJECT
                        Subject for email message (required).
  -b BODY, --body BODY  Boby text for the message (optional).
  -f MAILFROM, --mailfrom MAILFROM
                        The value of the From: header (optional); if not
                        provided $USER@$HOSTNAME will be use as sender
  -c CC, --malicc CC    The value of the CC: header (optional)
  -t RECIPIENT, --mailto RECIPIENT
                        A To: header value (at least one required)

prettyxml.py

Reformat XML in hierarchical structure.

usage: pretty-xml.py [-h] [-o OUTFILE] [XML [XML ...]]

Pretty prints XML file that is not pretty.

positional arguments:
  XML                   XML files to pretty print; if - or none provided,
                        stdin is assumed

optional arguments:
  -h, --help            show this help message and exit
  -o OUTFILE, --out OUTFILE
                        output filename; defaults to stdout

sshcmd

Runs single shh command on remote host

def sshcmd(cmd, host, password,)

Args:
    cmd: command to execute
    host: remote host to run on
    password: user's password on remote host

touch

UNIX like touch with ability to create missing folders.

touch(path, times=None, dirs=False)

Args:
    path: to touch
    times: a 2-tuple of the form (atime, mtime) where each member is an int or float expressing seconds.
           defaults to current time.
    dirs: if set, create missing folders

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