Download youtube videos without any plugin or application

This is very simple technique to download the youtube videos without any software support or plugin in browser.

step 1: copy the url of video.

ex: https://www.youtube.com/watch?v=ulE2CbvCCG0

step 2: Omit the part 'https://www.' from url and  add 'ss' instead of it in url.

ie, ssyoutube.com/watch?v=ulE2CbvCCG0

step 3: Reload the browser.

Barcode in RML Reports

Barcode in rml report:

<barCode code="code128" quiet="9" fontName="Times-Roman" barWidth="2.00" fontSize="350" alignment="CENTER">[[ o.reg_no ]]</barCode>

Install VirtualBox in Ubuntu

To install virtualbox in ubuntu:

sudo apt-get install virtualbox-ose

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

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
>>>

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')
>>>

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')
>>>

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'
>>>

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>

Number of days between two dates/ date differences in Python

To find the number of days between two given dates or to find the difference between two dates in Python. This function generally needs in many case in most of the program.

from datetime import datetime

def days_between(d1, d2):
    d1 = datetime.strptime(d1, "%Y-%m-%d")
    d2 = datetime.strptime(d2, "%Y-%m-%d")
    return abs((d2 - d1).days)

Example:

>>> from datetime import datetime
>>> d1 = '2014-05-10'
>>> d2 = '2014-05-05'
>>> d1 = datetime.strptime(d1, "%Y-%m-%d")
>>> d2 = datetime.strptime(d2, "%Y-%m-%d")
>>> no_of_days = abs((d2 - d1).days)
>>> no_of_days
5 

Remove duplicates from a list in Python

The python built in function 'set()' helps to remove the duplicates from a list.

consider an example:

>>> list1 = [1, 2, 3, 1, 2, 5, 6, 7, 8]
>>> list1
[1, 2, 3, 1, 2, 5, 6, 7, 8]
>>> set(list1)
set([1, 2, 3, 5, 6, 7, 8])
>>> list(set(list1))
[1, 2, 3, 5, 6, 7, 8]
>>>

Page Number in RML Report

To show the page number in rml report:

<drawString x="4.5cm" y="27.35cm"><pageCount/></drawString>

To show the page number in such a format 'page 1 of 3' :

<drawString x="9.5cm" y="0.2cm"> Page: <pageNumber/> of </drawString>
<drawString x="10.6cm" y="0.2cm"><pageCount/></drawString>

Install Magento theme using Magento Connect Manager 1.8

These are the steps to be followed to install theme in Magento 1.8 using Magento Connect Manager.

1. Go to Magento Admin Panel.  System -> Magento Connect -> Magento Connect Manager.

2. Here you will get an Login area.

3. Click on 'Magento connect' hyperlink.

4. Click on 'Themes' menu and select the category of theme you want.

5. Select the theme and go for install option.

6. Select the magento connect 1.0 or 2.0 and check the 'extension license agreement'. Then click on 'Get Extension Key' button.
7. Copy the extension key with the help of 'Select key' button.

8. Paste the extension key and go for 'Install' button.

9. Then it shows the 'Extension dependencies'. And its status will be 'Ready to install'. Then go for 'proceed' button.

10. Then it will shows that theme installed successfully and go for 'Refresh' button.

11. Then click on 'Return to Admin' button on top right.

12. Go to System -> Design.

13. Click 'Add Design Change' button.

14. Choose the theme which installed now in 'Custom Design' field and click on 'Save' button.

15. Reload your homepage.
    
     
    

Display/ Lists all magento products on Home Page

In Magento, almost all are facing an issue that products are not displaying in home page. This may be due to many reasons. Here i am explaining based on latest Magento 1.8. Mainly this occurs due to three reasons.

1. Home page Layout configuration.
2. Zero quantity product.
3. Out of stock product.

Please ensure the following that you are correctly configured.
Home page Layout configuration

1. Login into your Magento Admin Panel.
2. Go to CMS -> Pages. In the 'Manage Pages' list, choose 'Home page'.
3. Left side you can see 'Page Information'. In this choose 'Design'.
4. On right you can see 'Page Layout'. And also can see 'Layout Update XML'.
5. In this change the following

<block type="catalog/product_new" name="home.catalog.product.new" alias="product_new" template="catalog/product/new.phtml" after="cms_page">

to

<block type="catalog/product_list" name="home.catalog.product.list" alias="products_homepage" template="catalog/product/list.phtml">

Zero quantity product

1.  Login into your Magento Admin Panel.
2. Go to Catalog -> Manage Products. Select a product and ensure that the quantity of product is not zero.
3. If it is zero, then open the product, On left side you can see 'Product Information'.
4. Choose 'Inventory'. Then update the Qty to a number > zero.

Out of stock product

1.  Login into your Magento Admin Panel.
2.  Go to Catalog -> Manage Products. Select a product.
3.  Open the product, On left side you can see 'Product Information'.
4.  Choose 'Inventory'. Then change 'Stock Availability' to 'In Stock'.