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BaseException.message deprecated in Python 2.6
...from Exception and pass the message as the first parameter to the constructor
Example:
class MyException(Exception):
"""My documentation"""
try:
raise MyException('my detailed description')
except MyException as my:
print my # outputs 'my detailed description'
You can use str(my) or (l...
Canvas is stretched when using CSS but normal with “width” / “height” properties
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It seems that the width and height attributes determine the width or height of the canvas's coordinate system, whereas the CSS properties just determine the size of the box in which it will be shown.
This is explained at http://www.whatwg.org/html#attr-canvas-width (needs JS) or http://www...
What is the difference between JSF, Servlet and JSP?
... text in client side languages (like HTML, CSS, JavaScript, ect.). JSP supports taglibs, which are backed by pieces of Java code that let you control the page flow or output dynamically. A well-known taglib is JSTL. JSP also supports Expression Language, which can be used to access backend data (via...
How do I create a dictionary with keys from a list and values defaulting to (say) zero? [duplicate]
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dict((el,0) for el in a) will work well.
Python 2.7 and above also support dict comprehensions. That syntax is {el:0 for el in a}.
share
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Difference between FOR and AFTER triggers?
What's the difference between FOR and AFTER triggers?
3 Answers
3
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How to escape os.system() calls?
...ameters to commands. How can I do this? Preferably something that would work on multiple operating systems/shells but in particular for bash.
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Python string prints as [u'String']
...se double-check that your data is really ASCII. This is pretty rare. Much more likely it's latin-1 or utf-8.
soup[0].encode("latin-1")
soup[0].encode("utf-8")
Or you ask Beautiful Soup what the original encoding was and get it back in this encoding:
soup[0].encode(soup.originalEncoding)
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If a folder does not exist, create it
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As others have said, use System.IO.Directory.CreateDirectory
But, you don't need to check if it exists first. From the docs
Any and all directories specified in path are created, unless they already exist or unless some part of path is invalid. If the director...
What is the meaning of polyfills in HTML5?
What is the meaning of polyfills in HTML5? I saw this word in many sites about HTML5, e.g. HTML5-Cross-Browser-Polyfills.
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Safest way to convert float to integer in python?
Python's math module contain handy functions like floor & ceil . These functions take a floating point number and return the nearest integer below or above it. However these functions return the answer as a floating point number. For example:
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