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How can I define colors as variables in CSS?

...te long. I know that the client could ask for changes to the color scheme, and was wondering: is it possible to assign colors to variables, so that I can just change a variable to have the new color applied to all elements that use it? ...
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What is the difference between user and kernel modes in operating systems?

What are the differences between User Mode and Kernel Mode, why and how do you activate either of them, and what are their use cases? ...
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No module named _sqlite3

...sqlite-devel (or libsqlite3-dev on some Debian-based systems) Re-configure and re-compiled Python with ./configure --enable-loadable-sqlite-extensions && make && sudo make install Note The sudo make install part will set that python version to be the system-wide standard, which ...
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ValueError: numpy.dtype has the wrong size, try recompiling

I just installed pandas and statsmodels package on my python 2.7 When I tried "import pandas as pd", this error message comes out. Can anyone help? Thanks!!! ...
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How do I rename all folders and files to lowercase on Linux?

... A concise version using the "rename" command: find my_root_dir -depth -exec rename 's/(.*)\/([^\/]*)/$1\/\L$2/' {} \; This avoids problems with directories being renamed before files and trying to move files into non-existing directories (e.g. "A/A" into "a/a"). ...
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Exif manipulation library for python [closed]

...nt to check out exif-py: Python library to extract EXIF data from tiff and jpeg files. Very easy to use - $ ./EXIF.py image.jpg or the Python Imaging Library (PIL): The Python Imaging Library (PIL) adds image processing capabilities to your Python interpreter. This library supports many fi...
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Unzipping files in Python

I read through the zipfile documentation , but couldn't understand how to unzip a file, only how to zip a file. How do I unzip all the contents of a zip file into the same directory? ...
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source command not found in sh shell

...hat uses sh shell. I get an error in the line that uses the source command. It seems source is not included in my sh shell. ...
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How do I get a Cron like scheduler in Python? [closed]

I'm looking for a library in Python which will provide at and cron like functionality. 9 Answers ...
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What's the fundamental difference between MFC and ATL?

... nothing fancy), what is the fundamental difference I will see between ATL and MFC, to help me figure out which one to use? ...