Install VirtualBox in Ubuntu

To install virtualbox in ubuntu:

sudo apt-get install virtualbox-ose

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Install nautilus-open-terminal in Ubuntu

To get 'Open in Terminal' in right button option in Ubuntu, need to install nautilus-open-terminal.

command:

sudo apt-get install nautilus-open-terminal

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Generate random numbers in Python

Python random module helps to generate random numbers.
We can generate this in three ways

• randint(a, b)
• uniform(a, b)
• random()

randint(a, b) : returns a random integer number in the range [a, b]
uniform(a, b) : returns a floating point number in the range [a, b]
random() : returns a floating point number in the range [0, 1]

>>> import random
>>> a = random.randint(1,99)
>>> a
77
>>> b = random.uniform(1,999)
>>> b
766.6455229055509
>>> c = random.random()
>>> c
0.6372421095384033
>>>

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Convert PDF to JPEG Python

Convert pdf file to image file using 'PythonMagick' in Python. PythonMagick provides object oriented bindings for the ImageMagick Library. You can dowload PythonMagick

Ex:

>>> import PythonMagick
>>> pdf = 'Invoices.pdf'
>>> p = PythonMagick.Image()
>>> p.density('600')
>>> p.read(pdf)
>>> p.write('test_image.jpg')
>>>

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Date in Python and its Conversion

Current date in Python using 'time' module

>>> import time
>>> time.strftime("format")

Ex:

>>> import time
>>> time.strftime("%d-%m-%Y")
'20-05-2014'

>>> time.strftime("%d-%m-%Y %H:%M:%S")
'20-05-2014 12:17:51'

Current date in Python using 'datetime' module

>>> import datetime
>>> now = datetime.datetime.now()
>>> now
datetime.datetime(2014, 5, 20, 12, 19, 16, 547221)
>>> now.year
2014
>>> now.month
5
>>> now.day
20
>>> now.hour
12
>>> now.minute
19
>>> now.second
16
>>> now.microsecond
547221
>>>

Change date format using time module

syntax:

time.strftime('required format', time.strptime('date data', 'source format'))

Ex:

>>> import time
>>> d1 = time.strftime('%d-%m-%Y', time.strptime('2014-05-10', '%Y-%m-%d'))
>>> d1
'10-05-2014'
>>>

Convert date to datetime using datetime module

Ex:

>>> from datetime import datetime
>>> d1 = datetime.strftime(datetime.strptime('2014-05-10', '%Y-%m-%d'), "%Y-%m-%d 00:00:00")
>>> d1
'2014-05-10 00:00:00'
>>> d2 = datetime.strftime(datetime.strptime('2014-05-10', '%Y-%m-%d'), "%Y-%m-%d 23:59:59")
>>> d2
'2014-05-10 23:59:59'
>>> d1, d2
('2014-05-10 00:00:00', '2014-05-10 23:59:59')
>>>

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Generate random password in Python

To generate random password in Python

import string
import random
from random import sample

def create_password(self):
        """
        create a random password
        """
        rand = string.ascii_letters + string.digits
        length = 8
        passwd = ''.join(sample(rand, length))
        return passwd

Ex:

>>> import string
>>> import random
>>> from random import sample
>>> rand = string.ascii_letters + string.digits
>>> length = 8
>>> passwd = ''.join(sample(rand, length))
>>> passwd
'8fK6ZR0q'
>>>

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Add spaces between lines in RML reports OpenERP

In OpenERP, the rml repots generates will omit the white spaces between lines. So in order to maintain the white spaces between lines needs to modify the base code in openerp report module or modify the rml syntax.

Solution 1:

=== modified file 'openerp/report/render/rml2pdf/trml2pdf.py'
--- openerp/report/render/rml2pdf/trml2pdf.py    2012-07-16 07:52:17 +0000
+++ openerp/report/render/rml2pdf/trml2pdf.py    2012-07-19 10:16:33 +0000
@@ -743,6 +743,8 @@
                 style.__dict__.update(extra_style)
             result = []
             for i in self._textual(node).split('\n'):
+                if len(i.strip()) == 0:
+                    i = '<font color="white"> </font>'
                 result.append(platypus.Paragraph(i, style, **(utils.attr_get(node, [], {'bulletText':'str'}))))
             return result
         elif node.tag=='barCode':

Solution 2:

Replace <para></para> with <xpre></xpre> in rml file.

ex:

<xpre style="terp_default_9">[[ format(o.note or '') ]]</xpre>

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